Office Action 1: Non-Final Rejection (2025-03-18)
Rejection types: 102 - Lack of Novelty, 103 - Obviousness, 112 - Written Description/Enablement, Double Patenting

CLAIMS:
WHAT IS CLAIMED IS:

1\. A neck fan, comprising:
a first fan main body; and
a second fan main body connected to the first fan main body,
wherein the first fan main body and the second fan main body are configured to blow air towards a user respectively, the first fan main body and the second fan main body are respectively provided with a control switch, and the control switch is configured to control an operation of the first fan main body and/or the second fan main body.

2\. The neck fan according to claim 1, wherein the second fan main body and the first fan main body are oppositely arranged and are respectively positioned on two sides of the user's neck; and the second fan main body and the first fan main body have the same structure.

3\. The neck fan according to claim 1, wherein the first fan main body comprises a first main body portion, a first fan assembly, a first power supply assembly and a first switch, the first main body portion is provided with a first mounting cavity, the first power supply assembly is arranged within the first mounting cavity and is electrically connected to the first fan assembly, the first power supply assembly comprises a first battery and a first circuit board, the first switch and the first battery are electrically connected to the first circuit board, the first circuit board is provided with a first main control module, the first switch is mounted on the first main body portion and is electrically connected to the first main control module, and the first switch is configured to turn on or turn off the first fan assembly.

4\. The neck fan according to claim 3, wherein the first fan main body further comprises a first charging interface and a first charging control module, and the first charging interface and the first charging control module are configured to charge the first battery; the first fan main body further comprises a first status indication module, and the first status indication module is configured to display at least one of a startup status, a shutdown status, a charging status, and an output wind level of the first fan main body or the neck fan.

5\. The neck fan according to claim 3, wherein the first fan main body further comprises a first battery protection module, the first battery protection module is electrically connected to the first main control module and the first charging control module, and is configured to perform charging protection for the first battery.

6\. The neck fan according to claim 3,wherein the first switch comprises a stepless adjustment key configured to perform stepless adjustment and control the rotation speed of the first fan main body; and the stepless adjustment key is a potentiometer with variable electric resistance or an encoder.1

7\. The neck fan according to claim 6, wherein the stepless adjustment key comprises a plurality of connection terminals and at least one adjustment pin, one of the plurality of connection terminals is grounded, and at least one adjustment pin is configured for the user to operate so that the other connection terminals output corresponding stepless adjustment signals.

8\. The neck fan according to claim 3, wherein the first fan main body further comprises a first boost module; the first switch is configured to send out a first fan working signal; the first main control module, when receiving the first fan working signal, is configured to drive the first boost module to receive and boost the output voltage of the first battery, thereby driving the first fan assembly to operate; and the first main control module is also configured to control the output voltage of the first boost module to achieve control over the rotation speed of the first fan assembly.

9\. The neck fan according to claim 8, wherein the first boost module comprises an inductor and a switching element, a control terminal of a MCU of the first main control module is connected to a control terminal of the switching element, a first conducting terminal of the switching element is connected to the first battery via the inductor, a second conducting terminal of the switching element is grounded, the first conducting terminal of the switching element is connected to the first fan assembly, the MCU of the first main control module controls the on - off state of the switching element, thereby controlling the voltage from the first battery to be boosted through the inductor, and provides the boosted voltage to the first fan assembly to drive the first fan assembly to blow air.

10\. The neck fan according to claim 8, wherein the second fan main body further comprises a second main body portion, a second fan assembly, a second power supply assembly and a second switch, the second power supply assembly comprises a second battery and a second circuit board, the second switch and the second battery are electrically connected to the second circuit board, the second circuit board is provided with a second main control module, the second switch is mounted on the second main body portion and is electrically connected to the second main control module, the second switch is configured to turn on or turn off the second fan main body, the second fan main body further comprises a second boost module, the second switch is configured to send out a second fan working signal, the second main control module, when receiving the second fan working signal, is configured to drive the second boost module to receive and boost the output voltage of the second battery, thereby driving the second fan assembly to operate, and the second main control module is also configured to control the output voltage of the second boost module to achieve control over the rotation speed of the second fan assembly.2l1 The neck fan according to claim 10, wherein the first main body portion is provided with a first conductive end, the second main body portion is provided with a second conductive end,
when the first fan main body and the second fan main body are connected together, consequently, the first conductive end is communicated with the second conductive end, the first switch is electrically connected to the first main control module and the second main control module respectively, and the second switch is also electrically connected to the first main control module and the second main control module respectively, such that at least one of the first switch and the second switch can send out a third fan working signal; the first main control module is configured to receive the third fan working signal and drive the first boost module to boost the output voltage of the first battery, thereby driving the first fan assembly to operate, and the second main control module is configured to receive the third fan working signal and drive the second boost module to boost the output voltage of the second battery, thereby driving the second fan assembly to operate.

12\. The neck fan according to claim 1, wherein the first fan main body and the second fan main body are manufactured independently and then connected together through an assembly process.

13\. The neck fan according to claim 12, wherein the first fan main body and the second fan main body are detachably connected, so that the first fan main body and the second fan main body are able to operate and be used independently.

14\. The neck fan according to claim 12, wherein the neck fan further comprises a connection member, the connection member comprises a flexible connection portion, the flexible connection portion is provided with at least one installation hole, the at least one installation hole is configured to be sleeved and fixed on one end of the first fan main body and one end of the second fan main body, so that the first fan main body and the second fan main body are connected through the flexible connection portion.

15\. The neck fan according to claim 14, wherein an inner sidewall of the at least one installation hole is provided with a first anti-detachment structure and a second anti-detachment structure, the first anti-detachment structure is configured to engage with a first buckle on an outer surface of one end of the first fan main body, the second anti-detachment structure is configured to engage with a second buckle on one end of the second fan main body, and at least one of the first anti-detachment structure and the first buckle is provided with a plurality of concave - convex structures arranged in sequence along an extending direction of the connection member.
SVG {EMBED HERE} 0.1130.09
16\. The neck fan according to claim 15, wherein the first anti-detachment structure comprises a plurality of first buckle slots arranged along an extending direction of the connection member, the plurality of first buckle slots are configured to engage with a plurality of protrusions arranged along an extending direction of the first buckle; the second anti-detachment structure comprises a 3 plurality of second buckle slots arranged along the extending direction, the plurality of second buckle slots are configured to engage with a plurality of protrusions arranged along an extending direction of the second buckle; the first anti-detachment structure is configured to be detachably connected with the first buckle, and the second anti-detachment structure is configured to be detachably connected with the second buckle; the flexible connection portion is also provided with a first fixing structure and a second fixing structure, the first fixing structure and the second fixing structure are respectively arranged at two ends of the flexible connection portion, the first fixing structure is configured to connect with a third fixing structure at one end of the first fan main body, and the second fixing structure is configured to connect with a fourth fixing structure at one end of the second fan main body; the first fixing structure is configured to be detachably connected with the third fixing structure, and the second fixing structure is configured to be detachably connected with the fourth fixing structure.

17\. The neck fan according to claim 14, wherein the connection member further comprises at least one neck support portion, the at least one neck support portion is connected to an inner side of the flexible connection portion adjacent to thehuman neck, the at least one neck support portion is configured to form at least one air inlet gap with the first fan main body or the second fan main body, so that air from the first fan main body or the second fan main body can enter the air inlet gap.

18\. The neck fan according to claim 3, wherein the first fan main body comprises a first main body portion, the first main body portion has an arc-shaped structure, and comprises a concave first air guide path positioned on a surface of one side of the first main body portion and extended along an extending direction of the arc-shaped structure; the first fan assembly is arranged at one end of the first main body portion and is configured to blow air towards the first air guide path, and the first air guide path is configured to guide air of the first fan assembly to one side of the first main body portion and one end of the first main body portion away from the first fan assembly.

19\. The neck fan according to claim 18, wherein the first fan assembly comprises a first fan shell, a first motor, and a first fan blade mounted on a rotating shaft of the first motor, the first motor and the first fan blade are arranged within the first fan shell; the first fan shell comprises a shell main body and an air outlet hood, the air outlet hood is arranged on one side of the shell main body; the air outlet hood comprises a plurality of air gathering rings and an annular wall structure connected to a periphery of the plurality of air gathering rings, a plurality of air outlet holes are formed among the plurality of air gathering rings, and the air gathering rings are configured to cooperate with an inner side surface of the annular wall structure to pressurize wind from the shell main body and then blow it out.4

20.Theneck fan according to claim19, whereintheinner side surface of the annular wall structure is an inclined surfaceor an arc-shaped surface,so that an inner diameter of the annular wall structure gradually decreases along a direction from the shell main body to the air outlet hood; the shell main body comprises an annularly arranged sidewall structure, an mounting portion positioned at one end inside the sidewall structure and an air guiding portion connected between the mounting portion and the sidewall structure, the air guiding portion comprises a plurality of air guiding blades arranged at intervals and is configured to guide wind from the first fan blade based on a preset direction, the first fan blade and the first motor are arranged within the sidewall structure and are positioned on one side of the mounting portion, and the first motor is mounted on the mounting portion; the first fan shell further comprises a metal barrier net, the metal barrier net is arranged on one side of the sidewall structure away from the air outlet hood, the metal barrier net is made of metal material and is provided with a plurality of air inlet holes, and an inner diameter of each air inlet holes ranges from0.5mm to 4 mm; the air inlet hole is in a regular hexagon shape, a surrounding wall is arranged between two adjacent air inlet holes, and a width of the surrounding wall ranges from 0.05 mm to 2 mm.s

OFFICE ACTION:
Notice of Pre-AIA  or AIA  Status
The present application, filed on or after March 16, 2013, is being examined under the first inventor to file provisions of the AIA .
Claim Objections
Claims 2 and 17 are objected to because of the following informalities:
In claim 2, “positioned on two sides of the user’s neck” should read –configured to be positioned on two sides of a user’s neck--.
In claim 17, “adjacent to the human neck” should read --configured to rest adjacent a user’s neck--.
Appropriate correction is required.
Claim Rejections - 35 USC § 112
The following is a quotation of 35 U.S.C. 112(b):
(b)  CONCLUSION.—The specification shall conclude with one or more claims particularly pointing out and distinctly claiming the subject matter which the inventor or a joint inventor regards as the invention.
The following is a quotation of 35 U.S.C. 112 (pre-AIA ), second paragraph:
The specification shall conclude with one or more claims particularly pointing out and distinctly claiming the subject matter which the applicant regards as his invention.
Claims 2-10 and 18-20 is rejected under 35 U.S.C. 112(b) or 35 U.S.C. 112 (pre-AIA ), second paragraph, as being indefinite for failing to particularly point out and distinctly claim the subject matter which the inventor or a joint inventor (or for applications subject to pre-AIA  35 U.S.C. 112, the applicant), regards as the invention.
In claim 2, line 3, the limitation “the same structure” is indefinite for lacking sufficient antecedent basis because no structure per se has been recited or previously defined in the claim(s) rendering it unclear which structures of each fan main body are being referred to. Clarification and correction is required.
In claim 3, line 2, “the first switch” is indefinite because it is not clear if this switch is an element of or further limiting the control switch recited in claim 1 or another switch all together because the switch(es) are configured to operate the fan assemblies. The specification appears to disclose only one of these types of switches (para.’s 0097-0101, inter alia). For examination, it will be interpreted as further directed to and limiting the control switch of claim 1. Clarification and correction is required.
Double Patenting
A rejection based on double patenting of the “same invention” type finds its support in the language of 35 U.S.C. 101 which states that “whoever invents or discovers any new and useful process... may obtain a patent therefor...” (Emphasis added). Thus, the term “same invention,” in this context, means an invention drawn to identical subject matter. See Miller v. Eagle Mfg. Co., 151 U.S. 186 (1894); In re Vogel, 422 F.2d 438, 164 USPQ 619 (CCPA 1970); In re Ockert, 245 F.2d 467, 114 USPQ 330 (CCPA 1957).
A statutory type (35 U.S.C. 101) double patenting rejection can be overcome by canceling or amending the claims that are directed to the same invention so they are no longer coextensive in scope. The filing of a terminal disclaimer cannot overcome a double patenting rejection based upon 35 U.S.C. 101.
Claims 1-20 are provisionally rejected under 35 U.S.C. 101 as claiming the same invention as that of claims 1-20 of copending Application No. 19/010,416 (‘416). This is a provisional statutory double patenting rejection since the claims directed to the same invention have not in fact been patented.
The instant claims are identical to the claims presented in ‘416.
Claims 1-20 of this application are patentably indistinct from claims 1-20 of Application No. 19/010,416 (‘416). Pursuant to 37 CFR 1.78(f), when two or more applications filed by the same applicant or assignee contain patentably indistinct claims, elimination of such claims from all but one application may be required in the absence of good and sufficient reason for their retention during pendency in more than one application. Applicant is required to either cancel the patentably indistinct claims from all but one application or maintain a clear line of demarcation between the applications. See MPEP § 822.
The claims, drawings and specification in the ‘416 application are identical to the instant application claims, drawings and specification.
Claim Rejections - 35 USC § 102
In the event the determination of the status of the application as subject to AIA  35 U.S.C. 102 and 103 (or as subject to pre-AIA  35 U.S.C. 102 and 103) is incorrect, any correction of the statutory basis (i.e., changing from AIA  to pre-AIA ) for the rejection will not be considered a new ground of rejection if the prior art relied upon, and the rationale supporting the rejection, would be the same under either status.
The following is a quotation of the appropriate paragraphs of 35 U.S.C. 102 that form the basis for the rejections under this section made in this Office action:
A person shall be entitled to a patent unless –
(a)(1) the claimed invention was patented, described in a printed publication, or in public use, on sale, or otherwise available to the public before the effective filing date of the claimed invention.
Claims 1-3, 12-14, 17 and 18 are rejected under 35 U.S.C. 102(a)(1) as being anticipated by Lee (U. S. Patent Application Publication No. 2017/0370596).
Regarding claim 1, Lee discloses a neck fan (FIG.’s 1-6, Abstract), comprising:
a first fan main body 30 (FIG.’s 1-3, para. 0036, one-half of neckplace part 10 each having a fan 30, clearly shown); and a second fan main body (Id., other half of neckplace part 10) connected to the first fan main body (FIG. 4, para. 0081, via connector 70), wherein the first fan main body and the second fan main body are configured to blow air towards a user respectively (para. 0035), the first fan main body 30 and the second fan main body 30 are respectively provided with a control switch 53 (FIG. 1, para. 0072, operating button 53), and the control switch 53 is configured to control an operation of the first fan main body and/or the second fan main body (Id., “adjust intensity and intervals of wind by operating button 52”).
Re. claim 2, Lee further discloses the second fan main body and the first fan main body are oppositely arranged and are respectively positioned on two sides of the user's neck (FIG. 1, as shown); and the second fan main body and the first fan main body have the same structure (as shown)1.
Re. claim 3, Lee further discloses the first fan main body comprises a first main body portion C (as shown), a first fan assembly 30, 31 (para. 0039), a first power supply assembly B and a first switch 53 (para. 0066, battery B and button 53, the button is interpreted providing the input actuation for the recited first switch)2, the first main body portion is provided with a first mounting cavity (FIG. 3, surrounding fan 30, motor M and battery B), the first power supply assembly B is arranged within the first mounting cavity (shown) and is electrically connected to the first fan assembly 30, 31, the first power supply assembly comprises a first battery B and a first circuit board (para. 0066, “adjusting unit 52 includes a small-sized circuit board”), the first switch 53 and the first battery B are electrically connected to the first circuit board (not disclosed explicitly although explicitly required in order to operate the fan), the first circuit board is provided with a first main control module 50, 52 (para. 0063, control unit 50 and adjusting unit 52) the first switch 53 is mounted on the first main body portion (FIG. 1, as shown) and is electrically connected to the first main control module 50, 52, and the first switch 53 is configured to turn on or turn off the first fan assembly 30, 31 (para. 0072).
Re. claim 12, Lee further discloses the first fan main body and the second fan main body are manufactured independently (FIG. 3, as shown) and then connected together through an assembly process (a product-by-process limitation met by Lee since the end resulting structure of the half sections of casing components C1, C2 are structurally equivalent)3.
Re. claim 13, Lee further discloses the first fan main body and the second fan main body are detachably connected (by connection 70), so that the first fan main body and the second fan main body are able to operate and be used independently (an intended use limitation, Lee is capable of this use based upon the broadest reasonable interpretation of the terms).
Re. claim 14, Lee further discloses the neck fan further comprises a connection member 70, C (para.’s 0075 &0079, coupler C and connector 70), the connection member comprises a flexible connection portion 70 (para. 0099, “rubber of silicone”), the flexible connection portion is provided with at least one installation hole (as shown in center of coupler C element 12), the at least one installation hole is configured to be sleeved and fixed on one end of the first fan main body and one end of the second fan main body (para. 0099, protrusion and groove, shown in cutout view of FIG. 1 forming sleeved connection), so that the first fan main body and the second fan main body are connected through the flexible connection portion 70 (as shown).
Re. claim 17, Lee further discloses the connection member 70, C further comprises at least one neck support portion (outer surface of body forms a neck support portion), the at least one neck support portion is connected to an inner side of the flexible connection portion adjacent to the human neck (when worn by a user), the at least one neck support portion is configured to form at least one air inlet gap (holes H2 interpreted as providing air inlet gaps) with the first fan main body or the second fan main body, so that air from the first fan main body or the second fan main body can enter the air inlet gap (holes H2 proximate coupler C provide inlet or outlets depending upon operating state of the fan assemblies).
Re. claim 18, Lee further discloses the first main body portion C1 (FIG. 3, para. 0042), wherein the first main body portion has an arc-shaped structure C2 (Id., shown) and comprises a concave first air guide path (between 32 and C2 an arc-shaped surface is clearly shown) positioned on a surface of one side of the first main body portion C1 and extended along an extending direction of the arc-shaped structure (shown), and the first fan assembly 30, 31 (para. 0039, wind generation part 30 and fan 31), wherein the first fan assembly 30, 31 is arranged at one end of the first main body portion C1 (shown) and is configured to blow air towards the first air guide path (Id., “..air to flow to necklace part 10”), and the first air guide path (between 32 and C2) is configured to guide air of the first fan assembly to one side of the first main body portion and one end of the first main body portion away from the first fan assembly (toward holes H2 away from the fan assembly).
Claim Rejections - 35 USC § 103
The following is a quotation of 35 U.S.C. 103 which forms the basis for all obviousness rejections set forth in this Office action:
A patent for a claimed invention may not be obtained, notwithstanding that the claimed invention is not identically disclosed as set forth in section 102, if the differences between the claimed invention and the prior art are such that the claimed invention as a whole would have been obvious before the effective filing date of the claimed invention to a person having ordinary skill in the art to which the claimed invention pertains. Patentability shall not be negated by the manner in which the invention was made.
Claims 4, 6, and 7 are rejected under 35 U.S.C. 103 as being unpatentable over Lee (U. S. Patent Application Publication No. 2017/0370596) in view of Zheng et al. (U. S. Patent Application Publication No. 2024/0229809).
As to claim 4, Lee is discussed above but is silent as to the first fan main body further comprises a first charging interface and a first charging control module and the first charging interface and the first charging control module are configured to charge the first battery, the first fan main body further comprises a first status indication module, and the first status indication module is configured to display at least one of a startup status, a shutdown status, a charging status, and an output wind level of the first fan main body or the neck fan. In this regard, Zheng teaches a portable fan assembly having a first charging interface (FIG.’s 86-91, para.’s 0325-0327, inter alia, USB interface and associated circuit components including the fast-charging management unit circuit) and a first charging control module (Id., fast-charging management unit circuit), configured to charge first battery (upon modification when Zheng’s circuit is installed in Lee and connected to battery B according to modification below), further including a first status indication module 700, 900 (FIG.’s 85 & 86, para. 0322 & 0327, charging display unit 700 and display unit 900 includes an SMG switch interface and a digital display), and the first status indication module 700, 900 is configured to display at least one of a startup status, a shutdown status, a charging status (para. 0323, “send a fan operation status command; … pins 2, 12-15 of the control chip U4 are connected to the display unit 900 to output the display control signal” __interpreted as charging status under broadest reasonable interpretation of the terms), and an output wind level of the first fan main body or the neck fan. With this in mind, it would have been obvious to one having ordinary skill in the art before the effective filing date of the instant application to adapt Lee with a first charging interface, control and status indication module(s) configured as claimed in order to provide efficient fast-charging of the battery of the fan using a USB interface as suggested by Zheng, Id.
As to claim 6, Lee is discussed above and further discloses a stepless adjustment key configured to perform stepless adjustment and control the rotation speed of the first fan main body (para.’s 0068-0070, adjusting unit 52 changes voltage providing rotational speed control __interpreted as providing recited stepless adjustment accordingly). Lee is silent as to and the stepless adjustment key is a potentiometer with variable electric resistance or an encoder. In this regard, Zheng teaches a portable fan assembly having a rolling rotation encoder 214 (FIG. 50, para. 0203) providing inputs for stepless adjustment rotational speed control. To this point, it would have been obvious to one having ordinary skill in the art before the effective filing date of the instant application to modify Lee so that its rotational speed control is provided using an encoder in order to provide infinitely adjustable air output from the fan as suggested by Zheng, Id.
As to claim 7, Lee is discussed above but fails to disclose the stepless adjustment key comprises a plurality of connection terminals and at least one adjustment pin, one of the plurality of connection terminals is grounded, and at least one adjustment pin is configured for the user to operate so that the other connection terminals output corresponding stepless adjustment signals. Upon modification, Zheng further teaches the stepless adjustment key having a plurality of connection terminals (FIG. 50, para. 0209, encoder provided with at least two terminals 2141, 2142) and at least one adjustment pin (Id., adjustment module 201 interpreted to have at least one pin), one of the plurality of connection terminals is grounded (inherently), and at least one adjustment pin is configured for the user to operate so that the other connection terminals output corresponding stepless adjustment signals (para. 0210, “the first adjustment module 201 includes a first capacitor C1, a first resistor R1, and a second resistor R2. …[t]he first output end 2141 of the rolling rotation encoder 214 is connected to an end of the first resistor R1 and an end of the second resistor R2. … [t]he other end of the first capacitor C1 is grounded. … [t]he other end of the third resistor R3 is connected to the positive electrode of the storage battery 221, the other end of the fourth resistor R4 is connected to an end of the second capacitor C2, and the other end of the second capacitor C2 is grounded” __interpreted as forming an equivalent terminal and adjustment pin configuration providing the same functionality in the same way, achieving the same result).
Claim 5 is rejected under 35 U.S.C. 103 as being unpatentable over Lee (U. S. Patent Application Publication No. 2017/0370596) in view of Peterson (U. S. Patent Application Publication No. 2017/0302093).
As to claim 5, Lee is discussed above but is silent as to the first fan main body further comprises a first battery protection module, the first battery protection module is electrically connected to the first main control module and the first charging control module, and is configured to perform charging protection for the first battery. In this regard, charge protection is commonly implemented in a variety of portable battery powered devices to prevent over-load and damage. To this point, Peterson teaches a power conversion circuit having a battery protection module 404 (FIG. 4, para. 0060, inter alia, FET and associated components in the circuit form recited module) with provision for connecting to a charging control module and battery 400 (note terminal connection points). With this in mind, it would have been obvious to one having ordinary skill in the art before the effective filing date of the instant application to modify Lee and provide a battery protection module configured in the manner claimed in order to protect the battery against over-load and under voltage conditions as taught by Peterson, Id.
Claims 8-10 are rejected under 35 U.S.C. 103 as being unpatentable over Lee (U. S. Patent Application Publication No. 2017/0370596) in view of Dishman et al. (U. S. Patent Application Publication No. 2010/0164421).
As to claim 8, Lee is discussed above and further discloses the first switch 53 is configured to send out a first fan working signal (para. 0072). Lee is silent as to the first fan main body further comprises a first boost module, the first main control module, when receiving the first fan working signal, is configured to drive the first boost module to receive and boost the output voltage of the first battery, thereby driving the first fan assembly to operate; and the first main control module is also configured to control the output voltage of the first boost module to achieve control over the rotation speed of the first fan assembly. To this point, Dishman teaches a fan power supply arrangement comprising a boost module 202a-c, 210, 214, 216, 218 (FIG.’s 2 & 4, para.’s 0056, 0069) providing a switching power supply arrangement making for controlling fan speed (para. 0071). Dishman further indicates that the boosted control output signals can be PWM or voltage driven (para. 0062). With this in mind, it would have been obvious to one having ordinary skill in the art before the effective filing date of the instant application to modify Lee so that its control module comprises a first boost module configured to receive a fan working signal from the operating button or switch and boost the output value from the input, i. e., the battery, achieving rotation control to drive the fan at different speeds using the boost module circuits of Dishman __a power supply circuit configuration known to predictively convert input power to suitable output power levels for driving the fan at different speeds as suggested by Dishman (para. 0014, inter alia).
As to claim 9, once modified, Dishman further teaches the first boost module comprises an inductor L1, L2 (FIG. 4, para. 0069) and a switching element Q1, Q2, a control terminal of a MCU4 of the first main control module is connected to a control terminal of the switching element (upon modification), a first conducting terminal of the switching element is connected to the first battery via the inductor (upon modification, battery B of Lee would be connected to input leads of element 412 of the circuit of Dishman), a second conducting terminal of the switching element is grounded (inherent as shown by return lines to element 412 interpreted as providing a ground path), the first conducting terminal of the switching element is connected to the first fan assembly 114 (as shown and upon modification), the MCU of the first main control module controls the on - off state of the switching element, thereby controlling the voltage from the first battery to be boosted through the inductor L1, L2, and provides the boosted voltage to the first fan assembly 114 to drive the first fan assembly to blow air.
As to claim 10, Lee further discloses the second fan main body further comprises a second main body portion, a second fan assembly 30, a second power supply assembly B, the second power supply assembly comprises a second battery B (FIG. 3) a second circuit board, the second switch and the second battery are electrically connected to the second circuit board, the second circuit board is provided with a second main control module 50 (para. 0063, note that two sets of control unit 50, adjusting unit 52 and associated circuit components are depicted in FIG. 3). Lee is silent as to second switch is mounted on the second main body portion and is electrically connected to the second main control module, the second switch is configured to turn on or turn off the second fan main body. However, providing a second button or switch for the other fan is merely duplicating the known working elements of Lee. It has been held, see In re Harza, 274 F.2d 669, 124 USPQ 378 (CCPA 1960), that the mere duplication of parts has no patentable significance unless a new and unexpected result is produced. Since the button or switch is used to provide power to operate the fan, having duplicate buttons would produce an expected redundancy. Therefore, it would have been obvious to one of ordinary skill in the art before the filing of the claimed invention to duplicate the buttons or switches, with one button to control each fan, in order to provide redundancy as well as the ability to power on each fan. See MPEP 2144.04 (VI)(B).
Further as to claim 10, Lee is silent as to the second fan main body further comprises a second boost module, the second switch is configured to send out a second fan working signal, the second main control module, when receiving the second fan working signal, is configured to drive the second boost module to receive and boost the output voltage of the second battery, thereby driving the second fan assembly to operate, and the second main control module is also configured to control the output voltage of the second boost module to achieve control over the rotation speed of the second fan assembly. To this point, Dishman teaches a fan power supply arrangement comprising a boost module 202a-c, 210, 214, 216, 218 (FIG.’s 2 & 4, para.’s 0056, 0069) providing a switching power supply for controlling fan speed (para. 0071). Dishman further indicates that the boosted control output signals can be PWM or voltage driven (para. 0062). With this in mind, it would further have been obvious to provide the second boost module configured in the claimed manner in addition to the first module for the same reasons set forth in the rejection of claim 8 above since this is simply duplicating the known working elements of Dishman for driving the second fan assembly in order to control the second fan assembly separately. See MPEP 2144.04 (VI)(B).
Claim 19 is rejected under 35 U.S.C. 103 as being unpatentable over Lee (U. S. Patent Application Publication No. 2017/0370596) in view of Ji (U. S. Patent Application Publication No. 2023/0006512).
As to claim 19, Lee is discussed above and further discloses the first fan assembly 30, 31 comprises a first fan shell C1, a first motor M, and a first fan blade 31 mounted on a rotating shaft of the first motor M (as shown), the first motor M and the first fan blade 31 are arranged within the first fan shell 30 (shown), the first fan shell C1 comprises a shell main body (shown) and an air outlet hood (C2 where holes H2 are located), the air outlet hood is arranged on one side of the shell main body C1 (as shown). However, Lee is silent as to the air outlet hood comprises a plurality of air gathering rings and an annular wall structure connected to a periphery of the plurality of air gathering rings, a plurality of air outlet holes are formed among the plurality of air gathering rings, and the air gathering rings are configured as claimed. In this regard, Ji teaches a fan assembly having a first fan shell 1 (FIG. 8) comprising a shell main body 1 and an air outlet hood 11 (FIG. 3, para. 0030), the air outlet hood 11 is arranged on one side of the shell main body 1; the air outlet hood comprises a plurality of air gathering rings 11, 12 (Id., inner core 12 and outer hood 11 forming recited air gathering rings under broadest reasonable interpretation of the term) and an annular wall structure 11 (outer surface of sleeve 11) connected to a periphery of the plurality of air gathering rings 11, 12 a plurality of air outlet holes 14 (Id., ducts 14) are formed among the plurality of air gathering rings 11, 12, and the air gathering rings 11, 12 are configured to cooperate with an inner side surface of the annular wall structure to pressurize wind from the shell main body and then blow it out (FIG.  8, para. 0053, as shown and described). With this in mind, it would have been obvious to one having ordinary skill in the art before the effective filing date of the instant application to replace the fan assembly of Lee with the fan assembly of Ji __a fan configuration known to yield predictable air flow performance having expected results. The use of the fan assembly of Ji in the combination of Lee is considered a simple substitution of one known fan assembly configuration for that of another. Where a claimed improvement on a device or apparatus is no more than the simple substitution of one known element for another or the mere application of a known technique to a piece of prior art ready for improvement, the claim is unpatentable under 35 U.S.C. 103(a). Ex Parte Smith, 83 USPQ.2d 1509, 1518-19 (BPAI, 2007) (citing KSR v. Teleflex, 127 S.Ct. 1727, 1740, 82 USPQ2d 1385, 1396 (2007)).5
Claim 20 is rejected under 35 U.S.C. 103 as being unpatentable over Lee (U. S. Patent Application Publication No. 2017/0370596) in view of Ji (U. S. Patent Application Publication No. 2023/0006512) as applied to claim 19 above, further in view of Pille et al. (U. S. Patent Application Publication No. 2021/0190344).
As to claim 20, Lee further discloses a barrier net H1 (FIG. 6), the barrier net is arranged on one side of the sidewall structure away from the air outlet hood (shown), the barrier net is provided with a plurality of air inlet holes H1. Once modified, Ji further teaches the inner side surface of the annular wall structure is an inclined surface or an arc-shaped surface (inner surface of sleeve 11 is arc-shaped), the shell main body comprises an annularly arranged sidewall structure 11, an mounting portion 5, 52, 53 (end shown in FIG. 2) positioned at one end inside the sidewall structure and an air guiding portion 13 (FIG. 3, para. 0030, guide plates 13) connected between the mounting portion and the sidewall structure 11 (shown), the air guiding portion comprises a plurality of air guiding blades 13 (FIG. 4, para. 0030, guide plates 13) arranged at intervals and is configured to guide wind from the first fan blade (upon modification) based on a preset direction (toward outlet), the first fan blade and the first motor are arranged within the sidewall structure and are positioned on one side of the mounting portion (upon modification), and the first motor is mounted on the mounting portion (upon modification, fan assembly of Ji installs motor component ring 3 and winding 4 around shaft inside core 12 connecting to the mounting portion 5, 52, 53 (FIG. 2, para. 0033),
Lee and Ji are silent as to an inner diameter of the annular wall structure gradually decreases along a direction from the shell main body to the air outlet hood.  To this point, decreasing the inner diameter of a fluid passage along the flow direction is commonly done to increase flow velocity using the Venturi effect6.  With this in mind, the Examiner takes Official Notice that it would have been obvious to one having ordinary skill in the art before the effective filing date of the instant application to have the inner diameter of the annular wall decrease along the claimed direction to the outlet hood in order to increase the air flow velocity at the outlet using the Venturi effect.
Further, Lee is silent as to an inner diameter of each the air inlet holes ranges from 0.5mm to 4 mm. It has been held, see Gardner v. TEC Syst., Inc., 725 F.2d 1338, 220 USPQ 777 (Fed. Cir. 1984), cert. denied, 469 U.S. 830, that where the only difference between the prior art and the claims was a recitation of relative dimensions of the claimed device and a device having the claimed relative dimensions would not perform differently than the prior art device, the claimed device was not patentably distinct from the prior art device. Since applicant has not disclosed that having the inner diameter of the air inlet holes solves any stated problem or is for any particular purpose it appears that having the holes as claimed in Lee would perform equally well as the inlet holes claimed by applicant, absent persuasive evidence that the particular configuration of the claimed limitation is significant, it would have been an obvious matter of design choice, before the effective filing date of the instant application to modify the inner diameter of the inlet holes in the claimed range for the purpose of providing adequate inlet air flow to the fan assembly. See MPEP 2144.04 (IV)(A), Gardner v. TEC Syst., Inc., 725 F.2d 1338, 220 USPQ 777 (Fed. Cir. 1984), cert. denied, 469 U.S. 830, 225 USPQ 232 (1984).
Also, Lee is silent as to the barrier net being made of metal. The Examiner takes Official Notice that it would have been obvious to one having ordinary skill in the art before the effective filing date of the instant application to make the barrier net of metal __materials known for their suitable strength and durability for use in fan components.7
Lee and JI are discussed above but are silent as to the air inlet hole is in a regular hexagon shape, a surrounding wall is arranged between two adjacent air inlet holes, and a width of the surrounding wall ranges from 0.05 mm to 2 mm. In this regard, Pille teaches an air inlet diffuser with hexagonal inlet ducts 14 (FIG.’s 2A-2E, para. 0096). Thus, it would have been obvious to one having ordinary skill in the art before the effective filing date of the instant application to provide air inlet holes in a regular hexagonal shape in order to reduce turbulence and homogeneously distribute air into the fan as suggested by Pille (para.’s 0029-0031, inter alia).
Lastly, regarding the width of the wall ranging from 0.05 mm to 2 mm, it has been held, see Gardner v. TEC Syst., Inc., 725 F.2d 1338, 220 USPQ 777 (Fed. Cir. 1984), cert. denied, 469 U.S. 830, that where the only difference between the prior art and the claims was a recitation of relative dimensions of the claimed device and a device having the claimed relative dimensions would not perform differently than the prior art device, the claimed device was not patentably distinct from the prior art device. Since applicant has not disclosed that having the width of the wall of the air inlet holes solves any stated problem or is for any particular purpose it appears that having the holes of Pille would perform equally well as the inlet holes claimed by applicant, absent persuasive evidence that the particular configuration of the claimed limitation is significant, it would have been an obvious matter of design choice, before the effective filing date of the instant application to modify the width of the wall of the inlet holes in the claimed range by utilizing the values as claimed for the purpose of forming the hexagonal inlet openings with the required strength to handle the incoming air flow accordingly. See MPEP 2144.04 (IV)(A), Gardner v. TEC Syst., Inc., 725 F.2d 1338, 220 USPQ 777 (Fed. Cir. 1984), cert. denied, 469 U.S. 830, 225 USPQ 232 (1984).
Allowable Subject Matter
Claims 11, 15 and 16 are objected to as being dependent upon a rejected base claim, but would be allowable if rewritten in independent form including all of the limitations of the base claim and any intervening claims.
The following is a statement of reasons for the indication of allowable subject matter:
With respect to claim 11, the prior art of record either alone or in combination does not teach or suggest the neck fan of claim 1 including each of the limitations in claim 3, 8 and 10 further wherein the second fan main body further comprises a second main body portion, a second fan assembly, a second power supply assembly and a second switch, the second power supply assembly comprises a second battery and a second circuit board, the second switch and the second battery are electrically connected to the second circuit board, the second circuit board is provided with a second main control module, the second switch is mounted on the second main body portion and is electrically connected to the second main control module, the second switch is configured to turn on or turn off the second fan main body, the second fan main body further comprises a second boost module, the second switch is configured to send out a second fan working signal, the second main control module, when receiving the second fan working signal, is configured to drive the second boost module to receive and boost the output voltage of the second battery, thereby driving the second fan assembly to operate, and the second main control module is also configured to control the output voltage of the second boost module to achieve control over the rotation speed of the second fan assembly.
With respect to claim 15, the prior art of record either alone or in combination does not teach or suggest the neck fan of claim 1 including each of the limitations in claim 12 and 14 further wherein an inner sidewall of the at least one installation hole is provided with a first anti-detachment structure and a second anti-detachment structure, the first anti-detachment structure is configured to engage with a first buckle on an outer surface of one end of the first fan main body, the second anti-detachment structure is configured to engage with a second buckle on one end of the second fan main body, and at least one of the first anti-detachment structure and the first buckle is provided with a plurality of concave - convex structures arranged in sequence along an extending direction of the connection member.
It is the Examiner’s opinion that modifying the applied art in the manner claimed is neither contemplated nor would be foreseeable without benefit of the disclosure of the instant invention.
Conclusion
The prior art made of record and not relied upon is considered pertinent to applicant's disclosure.
Chen (U. S. Patent Application Publication 2019/0222038) discloses an MCU and battery charging module with USB interface components (FIG.’s 1-10, Abstract).


NEXT OFFICE ACTION: Notice of Pre-AIA  or AIA  Status
The present application, filed on or after March 16, 2013, is being examined under the first inventor to file provisions of the AIA .
Application Status
This communication is in response to the Amendment and Request for Reconsideration filed 21 May 2025. Claims 1-6, 8-11, 13, 15, 16 and 18-23 are pending in the application. Claims 1-3, 6, 10, 13, 15 and 18 have been amended. Claims 7, 12, 14 and 17 are cancelled. Claims 21-23 are new.
The claim objections are hereby withdrawn in light of Applicant's amendments.
The 35 U.S.C. 112(b) or 35 U.S.C. 112 (pre-AIA ), second paragraph rejections are hereby withdrawn in light of the amendments to the claims.
The 35 U.S.C. 101 statutory double patenting rejections have been overcome due to the amendments to the claims because the claims are no longer identical to the claims presented in co-pending application no. 19/010,416.
Terminal Disclaimer
The terminal disclaimer filed on 21 May 2025 disclaiming the terminal portion of any patent granted on this application which would extend beyond the expiration date of any patent issued in co-pending application no. 19/010,416  has been reviewed and is accepted.  Note however that terminal disclaimer filing itself DID NOT overcome the double patenting rejections because it cannot overcome a statutory double patenting rejection over 35 U.S.C.101.
EXAMINER'S AMENDMENT
An examiner’s amendment to the record appears below. Should the changes and/or additions be unacceptable to applicant, an amendment may be filed as provided by 37 CFR 1.312. To ensure consideration of such an amendment, it MUST be submitted no later than the payment of the issue fee.
Authorization for this examiner’s amendment was provided by Alex Hu on 9 June 2025 via voice mail.
The application has been amended as follows:
IN THE CLAIMS
In claim 1, line 20, “the connection member” has been replaced with --the connection portion--.
In claim 6, line 3, the phrase “control the rotation speed of the first main body” has been replaced with --control rotation speed of the first fan assembly--.
In claim 10, line 9, the phase “turn on and off the second fan main body” has been replaced with --turn on and off the second fan assembly--.
In claim 23, line 7, “pressurize wind” has been replaced with --pressurize air--1
Reasons for Allowance
The following is an examiner’s statement of reasons for allowance:
Claims 1, 21 and 22 and dependents are allowable for the reasons set forth on pp. 14-19 of the remarks filed with the response. The response hereby incorporated into these reasons for allowance
Any comments considered necessary by applicant must be submitted no later than the payment of the issue fee and, to avoid processing delays, should preferably accompany the issue fee.  Such submissions should be clearly labeled “Comments on Statement of Reasons for Allowance.”
Conclusion

CITED REFERENCE SUMMARIES: Ref US20240229809A1: Claims:
A portable bladeless fan, comprising: a housing, having an air inlet portion at a rear side of the housing and an air outlet portion at a front side of the housing, wherein the air inlet portion and the air outlet portion are fluidly connected with each other inside the housing; a mix-flow fan, arranged inside the housing and configured to rotate about a rotation shaft to generate an airflow; a pressurizing member, connected to a front portion of the housing and disposed at a front of the mix-flow fan, wherein the pressurizing member comprises a pressurizing seat and a plurality of second blades, the pressurizing seat comprises a pressurizing surface that is at least partially increased in a radial direction from the rear side to the front side, the plurality of the second blades are spaced apart from each other and are arranged on and connected to the pressurizing surface, the plurality of the second blades are connected to the housing, the airflow generated by the mix-flow is capable of being converted into a high-pressure airflow after flowing through the pressurizing surface, the plurality of the second blades are configured to re-arrange a direction of the airflow and to reduce a noise of the airflow to convert a sharp sound into a low sound.
a housing, having an air inlet portion at a rear side of the housing and an air outlet portion at a front side of the housing, wherein the air inlet portion and the air outlet portion are fluidly connected with each other inside the housing;
a mix-flow fan, arranged inside the housing and configured to rotate about a rotation shaft to generate an airflow;
a pressurizing member, connected to a front portion of the housing and disposed at a front of the mix-flow fan, wherein the pressurizing member comprises a pressurizing seat and a plurality of second blades, the pressurizing seat comprises a pressurizing surface that is at least partially increased in a radial direction from the rear side to the front side, the plurality of the second blades are spaced apart from each other and are arranged on and connected to the pressurizing surface, the plurality of the second blades are connected to the housing, the airflow generated by the mix-flow is capable of being converted into a high-pressure airflow after flowing through the pressurizing surface, the plurality of the second blades are configured to re-arrange a direction of the airflow and to reduce a noise of the airflow to convert a sharp sound into a low sound.
The portable bladeless fan according to claim 1 , wherein, the mix-flow fan comprises a rotation seat and a plurality of first blades; the rotation seat comprises an airflow guiding surface that is increased in the radial direction from the rear side to the front side, the plurality of the first blades are spaced apart from each other and are arranged on and connected to the airflow guiding surface; the airflow guiding surface and the pressurizing surface are increased in the radial direction to have a flared shape and to form an outwardly expanding pressurizing ramp, the pressurizing ramp is configured to increase a pressurizing path of the airflow, the pressurizing ramp and the housing are cooperatively configured to convert the sharp sound into the low sound.
the mix-flow fan comprises a rotation seat and a plurality of first blades;
the rotation seat comprises an airflow guiding surface that is increased in the radial direction from the rear side to the front side, the plurality of the first blades are spaced apart from each other and are arranged on and connected to the airflow guiding surface;
the airflow guiding surface and the pressurizing surface are increased in the radial direction to have a flared shape and to form an outwardly expanding pressurizing ramp, the pressurizing ramp is configured to increase a pressurizing path of the airflow, the pressurizing ramp and the housing are cooperatively configured to convert the sharp sound into the low sound.
The portable bladeless fan according to claim 2 , wherein, the rotation seat and the pressurizing seat are directly adjacent to each other and are spaced apart from each other axially; the airflow guiding surface and the pressurizing surface are directly adjacent to each other and are spaced apart from each other in an axial direction; and each of a spacing between the rotation seat and the pressurizing seat in the axial direction and a spacing between the airflow guiding surface and the pressurizing surface in the axial direction is in a range from 1 mm to 4 mm to guide the airflow generated by the mixed-flow fan to flow smoothly to the pressurizing surface and to reduce a noise generated by a turbulent flow.
the rotation seat and the pressurizing seat are directly adjacent to each other and are spaced apart from each other axially;
the airflow guiding surface and the pressurizing surface are directly adjacent to each other and are spaced apart from each other in an axial direction; and
each of a spacing between the rotation seat and the pressurizing seat in the axial direction and a spacing between the airflow guiding surface and the pressurizing surface in the axial direction is in a range from 1 mm to 4 mm to guide the airflow generated by the mixed-flow fan to flow smoothly to the pressurizing surface and to reduce a noise generated by a turbulent flow.
The portable bladeless fan according to claim 2 , wherein, the rotation seat defines a first chamber having an opening facing to the front side; the pressurizing seat defines second chamber having an opening facing to the rear side; the first chamber and the second chamber are at least partially overlapping with each other in the radial direction; the mix-flow fan comprises a motor received in the first chamber and the second chamber, the opening of the first chamber and the opening of the second chamber face towards and are communicated with each other to shield noise generated by the motor to convert the sharp sound to the low sound.
the rotation seat defines a first chamber having an opening facing to the front side;
the pressurizing seat defines second chamber having an opening facing to the rear side;
the first chamber and the second chamber are at least partially overlapping with each other in the radial direction;
the mix-flow fan comprises a motor received in the first chamber and the second chamber, the opening of the first chamber and the opening of the second chamber face towards and are communicated with each other to shield noise generated by the motor to convert the sharp sound to the low sound.
The portable bladeless fan according to claim 1 , wherein, a cross section of a front portion of the pressurizing seat, taken along the radial direction, has a radius of 21.3 mm to 22 mm; or a cross section of a front portion of the pressurizing seat, taken along the radial direction, has a radius of 28 mm to 35 mm to increase an airflow area without reducing an airflow amount and an air pressure; and a thickness of the pressurizing seat in a front-rear direction is in a range from 9.5 mm to 14.5 mm.
a cross section of a front portion of the pressurizing seat, taken along the radial direction, has a radius of 21.3 mm to 22 mm; or a cross section of a front portion of the pressurizing seat, taken along the radial direction, has a radius of 28 mm to 35 mm to increase an airflow area without reducing an airflow amount and an air pressure; and
a thickness of the pressurizing seat in a front-rear direction is in a range from 9.5 mm to 14.5 mm.
The portable bladeless fan according to claim 1 , wherein, a front end of the pressurizing member is recessed towards the rear side; a front cover is arranged at the front end of the pressurizing member, the front cover is recessed towards the rear side to form a negative pressure region to guide a localized airflow, after flowing out of the air outlet portion, to flow attachingly along a front surface of the front cover to compensate the negative pressure region and to reduce turbulence.
a front end of the pressurizing member is recessed towards the rear side;
a front cover is arranged at the front end of the pressurizing member, the front cover is recessed towards the rear side to form a negative pressure region to guide a localized airflow, after flowing out of the air outlet portion, to flow attachingly along a front surface of the front cover to compensate the negative pressure region and to reduce turbulence.
A portable bladeless fan, comprising: a housing, having an air inlet portion at a rear side of the housing and an air outlet portion at a front side of the housing, wherein the air inlet portion and the air outlet portion are fluidly connected with each other inside the housing; a pressurizing member, connected to a front portion of the housing; a mix-flow fan, arranged inside the housing and connected to a rear of the pressurizing member, wherein the mix-flow fan is configured to rotate about a rotation shaft to generate an airflow; a booster, arranged inside the housing and surrounding a periphery of the mix-flow fan; wherein a first channel is formed between the mix-flow fan and the booster, a second channel is formed between the pressurizing member and the housing, the first channel and the second channel cooperatively form a pressurizing conduction channel, the airflow is capable of flowing from the air inlet portion, passing through the pressurizing guiding channel, to reach the fan outlet portion.
a pressurizing member, connected to a front portion of the housing;
a mix-flow fan, arranged inside the housing and connected to a rear of the pressurizing member, wherein the mix-flow fan is configured to rotate about a rotation shaft to generate an airflow;
a booster, arranged inside the housing and surrounding a periphery of the mix-flow fan;
wherein a first channel is formed between the mix-flow fan and the booster, a second channel is formed between the pressurizing member and the housing, the first channel and the second channel cooperatively form a pressurizing conduction channel, the airflow is capable of flowing from the air inlet portion, passing through the pressurizing guiding channel, to reach the fan outlet portion.
The portable bladeless fan according to claim 7 , wherein, the housing comprises a first housing and a second housing connected to the first housing; the first housing is firstly gradually increased along a radial direction of the air inlet portion from the front side to the rear side and is subsequently increased along the radial direction from the rear side to the front side; the second housing is gradually decreased along the radial direction from the rear side to the front side; and the booster is spaced apart from the first housing to absorb the noise generated by rotation of the mix-flow fan.
the housing comprises a first housing and a second housing connected to the first housing;
the first housing is firstly gradually increased along a radial direction of the air inlet portion from the front side to the rear side and is subsequently increased along the radial direction from the rear side to the front side;
the second housing is gradually decreased along the radial direction from the rear side to the front side; and
the booster is spaced apart from the first housing to absorb the noise generated by rotation of the mix-flow fan.
The portable bladeless fan according to claim 7 , wherein, the mix-flow fan comprises a rotation seat, the rotation seat comprises an airflow guiding surface and a plurality of first blades, the airflow guiding surface is at least partially gradually increased in the radial direction from the rear to the front, the plurality of first blades are arranged on and connected to the airflow guiding surface and are spaced apart from each other; the pressurizing member comprises a pressurizing seat and a plurality of second blades, the pressurizing seat comprises a pressurizing surface that is at least partially increased in the radial direction from the rear side to the front side, the plurality of the second blades are spaced apart from each other and are arranged on and connected to the pressurizing surface, the plurality of the second blades are connected to the housing; and the booster comprises a booster surface that faces the mix-flow fan and is at least partially increased in the radial direction from the rear side to the front side.
the mix-flow fan comprises a rotation seat, the rotation seat comprises an airflow guiding surface and a plurality of first blades, the airflow guiding surface is at least partially gradually increased in the radial direction from the rear to the front, the plurality of first blades are arranged on and connected to the airflow guiding surface and are spaced apart from each other;
the pressurizing member comprises a pressurizing seat and a plurality of second blades, the pressurizing seat comprises a pressurizing surface that is at least partially increased in the radial direction from the rear side to the front side, the plurality of the second blades are spaced apart from each other and are arranged on and connected to the pressurizing surface, the plurality of the second blades are connected to the housing; and
the booster comprises a booster surface that faces the mix-flow fan and is at least partially increased in the radial direction from the rear side to the front side.
The portable bladeless fan according to claim 9 , wherein, each of at least a portion of the airflow guiding surface and at least a portion of the pressurizing surface is radially recessed to form a concave surface, at least a portion of the pressurizing surface is radially protruded to form a convex surface; a volume within the pressurized airflow guiding channel is increased to gather the airflow.
each of at least a portion of the airflow guiding surface and at least a portion of the pressurizing surface is radially recessed to form a concave surface, at least a portion of the pressurizing surface is radially protruded to form a convex surface; a volume within the pressurized airflow guiding channel is increased to gather the airflow.
The portable bladeless fan according to claim 9 , wherein, a minimum radial gap between the first blades and the pressurizing surface is maintained within an error range of an equivalent separation distance to prevent the airflow at a front end of the mix-flow from flowing around the minimum radial gap to flow reversely to a rear end of the mix-flow.
The portable bladeless fan according to claim 7 , wherein a front end of the booster is aligned with a front end of the mix-flow fan; or a front end of the booster is protrudes from a front end of the mix-flow fan.
a front end of the booster is aligned with a front end of the mix-flow fan; or
a front end of the booster is protrudes from a front end of the mix-flow fan.
The portable bladeless fan according to claim 7 , wherein a height of the front end of the booster is in a range from 1.4 mm to 3.7 mm, the front end of the booster and the housing form a stepped shape to guide a high-pressure airflow generated by the mix-flow fan to flow quickly to the pressurizing member.
a height of the front end of the booster is in a range from 1.4 mm to 3.7 mm, the front end of the booster and the housing form a stepped shape to guide a high-pressure airflow generated by the mix-flow fan to flow quickly to the pressurizing member.
A portable bladeless fan, comprising: a housing, having an air inlet portion at a rear side of the housing and an air outlet portion at a front side of the housing, wherein the air inlet portion and the air outlet portion are fluidly connected with each other inside the housing, and a handle is arranged at a lower side of the housing; a pressurizing member, comprising a pressurizing seat and a plurality of second blades that are spaced apart from each other and are arranged on and connected to a radial outside of the pressurizing seat, wherein the pressurizing seat defines a first cavity having an opening facing to the rear side, the plurality of the second blades are connected to a front portion of the housing, and one of the plurality of second blades defines a wire-through slot communicating with the first cavity; a mix-flow fan, arranged inside the housing and connected to a rear side of the pressurizing member, wherein the mix-flow fan is configured to rotate about a rotation shaft to generate an airflow, the mix-flow fan comprises a motor, a rotation seat and a plurality of first blades, the plurality of the first blades are spaced apart from each other and are arranged on a radial outside of the rotation seat, the motor is configured to drive the rotation seat and the plurality of the first blades to rotate, the rotation seat defines a second cavity having an opening facing towards the front side, the motor is received in the first cavity and the second cavity; a main board, at least partially arranged inside the handle, wherein a wire is arranged to connect the motor to the main board; and the wire extends from the motor, passing through the wire-through slot, to the main board.
a housing, having an air inlet portion at a rear side of the housing and an air outlet portion at a front side of the housing, wherein the air inlet portion and the air outlet portion are fluidly connected with each other inside the housing, and a handle is arranged at a lower side of the housing;
a pressurizing member, comprising a pressurizing seat and a plurality of second blades that are spaced apart from each other and are arranged on and connected to a radial outside of the pressurizing seat, wherein the pressurizing seat defines a first cavity having an opening facing to the rear side, the plurality of the second blades are connected to a front portion of the housing, and one of the plurality of second blades defines a wire-through slot communicating with the first cavity;
a mix-flow fan, arranged inside the housing and connected to a rear side of the pressurizing member, wherein the mix-flow fan is configured to rotate about a rotation shaft to generate an airflow, the mix-flow fan comprises a motor, a rotation seat and a plurality of first blades, the plurality of the first blades are spaced apart from each other and are arranged on a radial outside of the rotation seat, the motor is configured to drive the rotation seat and the plurality of the first blades to rotate, the rotation seat defines a second cavity having an opening facing towards the front side, the motor is received in the first cavity and the second cavity;
a main board, at least partially arranged inside the handle, wherein a wire is arranged to connect the motor to the main board; and the wire extends from the motor, passing through the wire-through slot, to the main board.
The portable bladeless fan according to claim 14 , wherein, the main board has a first side and a second side parallel to the first side, the first side faces toward the rear side, and the second side faces toward the front side; an end of the wire is connected to the motor, and the other end of the wire is connected to the main board and disposed on the first side.
the main board has a first side and a second side parallel to the first side, the first side faces toward the rear side, and the second side faces toward the front side;
an end of the wire is connected to the motor, and the other end of the wire is connected to the main board and disposed on the first side.
The portable bladeless fan according to claim 15 , wherein, a wire ramp is disposed at a rear of the wire-through slot and is configured to limit movement of the wire, two ends of the wire-through slot extend towards the rear side to arrange resisting blocks, the resisting blocks abuts against the wire ramp to limit movement of the wire ramp on a mounting plane.
The portable bladeless fan according to claim 16 , wherein an end of th
[Truncated to input limit]