Patent Description:
With the development of technologies, a current handheld device usually has, in addition to a call function, functions of certain consumer electronic products, for example, the common image capturing function. Thus, a current handheld device is usually provided with an image capturing element. A lens module of the image capturing element needs to be exposed outside the handheld device. To install a protection accessory to the handheld device having the lens module, the protection accessory needs a corresponding structure in order to avoid influences on the image capturing function.

However, in current related protection accessories, a structure corresponding to the lens module of a handheld device is mostly a basic opening. Such structure provides a relatively low level of protection for the lens module, and at the same time does not offer other additional effects. Therefore, there is significant room for improvement of the structure of a current protection accessory for a handheld device.

Protective assemblies are disclosed <CIT> and <CIT>.

In view of the above, it is an object of the present invention to provide a protection case assembly capable of enhancing protection for a lens module of a handheld device.

One aspect of the present invention provides a protection case assembly for a handheld device. The protection case assembly includes a main case and a frame. The main case has an accommodating space configured to accommodate the handheld device, and an opening disposed correspondingly to a lens module of the handheld device. The frame is detachably disposed in the opening, and includes a groove set configured to receive the main case in the opening.

The main case further includes a backplate corresponding to a back surface of the handheld device. The opening is provided on the backplate. The groove set is configured to receive the backplate of the main case in the opening.

In some embodiments, the opening has an inner peripheral surface. The frame has an outer peripheral surface corresponding to the inner peripheral surface. The groove set includes at least one groove formed on the outer peripheral surface and configured to receive the main case in the opening.

In some embodiments, the inner peripheral surface has a first inner peripheral surface part and a second inner peripheral surface part opposite to the first inner peripheral surface part. The outer peripheral surface has a first outer peripheral surface part corresponding to the first inner peripheral surface peripheral part and a second outer peripheral surface part corresponding to the second inner peripheral surface part. The at least one groove includes a first groove and a second groove. The first groove is formed on the first outer peripheral surface part, and includes two first protrusions, between which the main case is received. The second groove is formed on the second outer peripheral surface part, and includes two second protrusions, between which the main case is received.

In some embodiments, the opening forms a third protrusion and a fourth protrusion on the first inner peripheral surface part and the second inner peripheral surface part, respectively. The third protrusion is received between the first protrusions, and the fourth protrusion is received between the second protrusions.

In some embodiments, the inner peripheral surface has a third inner peripheral part adjacent to the first inner peripheral surface part and the second inner peripheral surface part, and a fourth inner peripheral surface part opposite to the third inner peripheral surface part. The outer peripheral surface has a third outer peripheral surface part and a fourth outer peripheral surface part. The third outer peripheral surface part has a flat area corresponding to the third inner peripheral surface part, and a protrusion abutted against a surface of the backplate facing the accommodating space. The fourth outer peripheral surface part has a second flat area corresponding to the fourth inner peripheral surface part, and a protrusion abutted against the surface of the backplate facing the accommodating space.

The frame further includes a pad portion, and the pad portion protrudes toward the accommodating space when the frame is disposed in the opening.

In some embodiments, the pad portion is provided at the frame correspondingly to an encirclement of the frame.

According to the invention, the material hardness of the groove set is more than the material hardness of the pad portion.

In some embodiments, between the surface of the pad portion facing the accommodating space and the surface of the backplate facing the accommodating space is a height difference.

In some embodiments, the height difference is between <NUM> and <NUM>.

The present invention further provides a protection case assembly for a handheld device. The protection case assembly includes a main case and a frame. The main case has an accommodating space configured to accommodate the handheld device, and a backplate provided with an opening corresponding to a lens module of the handheld device. The frame is detachably disposed in the opening, and includes a first frame part corresponding to a first inner peripheral surface of the opening, a second frame part opposite to the first frame part and corresponding to a second inner peripheral surface of the opening, a third frame part corresponding to a third inner peripheral surface of the opening, and a fourth frame part opposite to the third frame part and corresponding to a fourth inner peripheral surface of the opening. On a first cross section of the opening, the first frame part forms a first groove toward the first inner peripheral surface, and the first inner peripheral surface is received between two protrusions of the first groove. On a second cross section of the opening, the third frame part forms a first L shape, and a protrusion of the first L shape is abutted against the backplate from the accommodating space.

In some embodiment, the first frame part is adjacent to the third frame part and the fourth frame part. The second frame part is adjacent to the third frame part and the fourth frame part. On a first cross section, the second frame part forms a second groove toward the second inner peripheral surface, and the second inner peripheral surface is received between two protrusions of the second groove. On a second cross section, the fourth frame part forms a second L shape, and a protrusion of the second L shape is abutted against the backplate from the accommodating space.

In some embodiments, the opening forms a protrusion on the first inner peripheral surface. The protrusion of the first inner peripheral surface is received between the two protrusions of the first groove. On the first cross section, the thickness of the protrusion of the first inner peripheral surface is less than the thickness of the backplate.

In some embodiments, the first cross section crosses the second cross section cross, and the first cross section and the second cross section individually cross an extension surface of the backplate.

Embodiments of the present invention may be best understood by the detailed description given with the accompanying drawings below. It should be noted that, the features may not be drawn according to actual sizes. In fact, for clarity of discussion, sizes of various features may be increased or decreased as desired.

The following disclosure provides different embodiments or practical examples of different features of subjects for implementation. Specific practical examples of assemblies and configurations are described below to simplify the present invention. It should be noted that, the assemblies and configurations are practical examples and are not to be construed as limitations. In the present invention, a first feature formed above or on a second feature in the description may include an embodiment in which the first feature and the second feature are formed in a direct contact manner, and may include an embodiment in which an additional feature is formed between the first feature and the second feature such that the first feature and the second feature may not be in direct contact. Further, drawing symbols and/or characters may be repeated in the embodiments. Such repetition is for the purpose of simplification and clarity, and does not indicate relationships of the embodiments and/or configurations discussed.

Embodiments of the present invention are described in detail below. However, it should be understood that the present invention provides numerous suitable concepts that may be embodied in multiple specific scenarios. The discussed embodiments are illustrative and do not form limitations to the scope of the present invention.

Further, for better description, terms such "below", "under", "above", "an upper part", "a lower part", "left" and "right", and relative spatial terms of similar terms thereof may be used to describe an illustrated relationship between one element or feature and one other (or more) element or feature in the drawings. Apart from the directions depicted in the drawings, the relative spatial terms are also meant to cover different directions of a device during use or operation thereof. An apparatus may be directed by other means (rotated by <NUM> degrees or in another direction), and the relative spatial descriptive terms used in the disclosure may be similarly explained. It should be understood that, when an element is defined as being "connected to" or "coupled to" another element, the element may be directly connected or coupled to another element, or an intermediate element may be present.

Value ranges and parameters for describing general ranges of the present invention are approximate values, and values given in specific embodiments are reported as accurately as possible. However, some values may contain errors caused by discovered standard errors in individual test and measurement values. Further, the term "approximately" usually means that a given value or range is within an error of ±<NUM>%, ±<NUM>%, ±<NUM>% or ±<NUM>%. In substitution, a person skilled in the art would consider that the term "approximately" means an acceptable standard error of an average value. Except for practical operation/working examples, unless otherwise explicitly specified, value ranges, quantities, values and percentages (for example, the number of materials, duration of time, temperature, operating conditions, ratios of quantities and similar or equivalent) should be understood as being modified by the term "approximately". Therefore, unless otherwise specified, the values and parameters given in the invention and the appended claims may be variable similar values. At least, numerical parameters should be understood based on the reported significant digits and by applying general rounding techniques. A range may be presented herein from one endpoint to another endpoint or between two endpoints. Unless otherwise specified, all ranges disclosed in the description include endpoints. The term "substantially coplanar" may refer to two surfaces that are within a few micrometers (µm) along the same plane (such as within <NUM>, <NUM>, <NUM>, or <NUM> along the same plane). Where values or characteristics are said to be "substantially" the same, the term may mean that the values are within ±<NUM>%, ±<NUM>%, ±<NUM>% or ±<NUM>% of the average of the values.

A protection case assembly disclosed by the present invention is configured to accommodate a handheld device. The protection case assembly includes a main case and a frame detachably disposed in an opening of the main case. The frame may serve as a liner, and conformally encircles an inner peripheral surface of the opening. When the frame and the main case are in a complete received state, the frame and the main case at least simultaneously have two different receiving structures. The two different receiving structures may include a structure in which the frame and the main case are abutted by a single side, or at least may include a structure in which the frame is designed with two walls that clamp the main case. It is an object of the present invention to provide at least two different receiving structures for enhancing convenience for installing/removing the frame for a user. It is another object of the present invention to provide at least two different receiving structures, such that at least two different types of stress is produced and the stress is fed back to the user by multiple predetermined contact points of the frame and the main case when the frame and the main case are separated or coupled, so as to enable the user to sense whether the frame and the main case are completely fittingly received.

Refer to <FIG>. <FIG> shows a three-dimensional diagram of a protection case assembly <NUM> according to some embodiments of the present invention. <FIG> shows an exploded diagram of the protection case assembly <NUM> according to some embodiments of the present invention. The protection case assembly <NUM> includes a main case <NUM> and a frame <NUM>. <FIG> shows a three-dimensional diagram of the frame <NUM> according to some embodiments of the present invention. <FIG> shows a section diagram of the frame <NUM> along a section line A-A' in <FIG>. <FIG> and <FIG> are schematic diagrams of the protection case assembly <NUM> in use according to some embodiments of the present invention.

Specifically, the main case <NUM> has an accommodating space <NUM> configured to accommodate a handheld device <NUM>. The handheld device <NUM> is detachably disposed in the accommodating space <NUM> of the main case <NUM>. The main case <NUM> has an opening <NUM>, and the frame <NUM> is detachably disposed in the opening <NUM>. In some embodiments, the frame <NUM> has a groove set <NUM> configured to fittingly receive the main case <NUM> in the opening <NUM>.

More specifically, the handheld device <NUM> includes a lens module <NUM> provided on a back surface <NUM> of the handheld device <NUM>. The opening <NUM> of the main case <NUM> is formed on a position corresponding to the lens module <NUM> on the back surface <NUM>, and is configured to expose the lens module <NUM> when the handheld device <NUM> is disposed in the accommodating space <NUM>. Thus, the lens module <NUM> may be prevented from being blocked.

On the other hand, the shape of the space defined by the hollow part of the frame <NUM> matches the shape of the lens module <NUM> protruding from the back surface <NUM>. Thus, when the frame <NUM> is installed in the opening <NUM>, the space defined by the hollow part of the frame <NUM> may be coupled to the lens module <NUM> and provides the lens module <NUM> with protection, at the same time enhancing the overall esthetic values of the protection case assembly <NUM>.

Refer to <FIG>. <FIG> shows a three-dimensional diagram of a protection case assembly <NUM> according to some embodiments of the present invention. <FIG> shows an exploded diagram of the protection case assembly <NUM> according to some embodiments of the present invention. <FIG> shows a schematic diagram of the protection case assembly <NUM> in use according to some embodiments of the present invention. Particularly, the protection case assembly <NUM> includes a main case <NUM> and a frame <NUM>. The main case <NUM> has an accommodating space <NUM> and a backplate <NUM>.

In some embodiments, the accommodating space <NUM> of the main case <NUM> is defined by a rim <NUM> and the backplate <NUM> of the main case <NUM>, and is configured to accommodate a handheld device <NUM>. The handheld device <NUM> is detachably disposed in the accommodating space <NUM> of the main case <NUM>. The handheld device <NUM> includes a lens module <NUM> provided on a back surface <NUM> of the handheld device <NUM>. The main case <NUM> is provided with an opening <NUM> on the backplate <NUM> on a position corresponding to the lens module <NUM> so as to expose the lens module <NUM>. Thus, the lens module <NUM> is prevented from being blocked. The frame <NUM> is detachably disposed in the opening <NUM>.

Refer to <FIG>. <FIG> shows an enlarged partial diagram of the main case <NUM> according to some embodiments of the present invention. <FIG> shows a front view of the main case <NUM> in a direction D1 in <FIG> of the present invention. <FIG> shows a three-dimensional diagram of the frame <NUM> according to some embodiments of the present invention. <FIG> shows a front view of the frame <NUM> in a direction D2 in <FIG> of the present invention. Particularly, the opening <NUM> has an inner peripheral surface 212A encircling the opening <NUM>. The inner peripheral surface 212A defines the hole of the opening <NUM>, and is connected to inner and outer surfaces of the backplate <NUM>. Corresponding to the inner peripheral surface 212A, the frame <NUM> has an outer peripheral surface 23A encircling the frame <NUM>. A groove set <NUM> is formed on the outer peripheral surface 23A, and is configured to fittingly receive the main case <NUM> in the opening <NUM>.

More specifically, in some embodiments, the inner peripheral surface 212A of the opening <NUM> may be divided into a first inner peripheral part 212A1, a second inner peripheral surface part 212A2, a third inner peripheral surface part 212A3 and a fourth inner peripheral surface part 212A4. In the opening <NUM>, the first inner peripheral surface part 212A1 is opposite to the second inner peripheral surface part 212A2, and the third inner peripheral surface part 212A3 is opposite to the fourth inner peripheral surface part 212A4. In some embodiments, the third inner peripheral surface part 212A3 is adjacent to the first inner peripheral surface part 212A1 and the second inner peripheral surface part 212A2, and the fourth inner peripheral surface part 212A4 is adjacent to the first inner peripheral surface part 212A1 and the second inner peripheral surface part 212A2. In other words, the inner peripheral surface parts 212A1 to 212A4 are connected to form the inner peripheral surface 212A of the opening <NUM>.

On the other hand, in some embodiments, the outer peripheral surface 23A of the frame <NUM> may be divided into a first outer peripheral surface part 23A1, a second outer peripheral surface part 23A2, a third outer peripheral surface part 23A3 and a fourth outer peripheral surface part 23A4. In some embodiments, the third outer peripheral surface part 23A3 is adjacent to the first outer peripheral surface part 23A1 and the second outer peripheral surface part 23A2, and the fourth outer peripheral surface part 23A4 is adjacent to the first outer peripheral surface part 23A1 and the second outer peripheral surface part 23A2. In other words, the outer peripheral surface parts 21A1 to 23A4 are connected to form the outer peripheral surface 23A of the frame <NUM>.

In some embodiments, the frame <NUM> may be distinguished into a first frame part 23a, a second frame part 23b, a third frame part 23c and a fourth frame part 24d based on the first outer peripheral surface part 23A1, the second outer peripheral surface part 23A2, the third outer peripheral surface part 23A3 and the fourth outer peripheral surface part 23A4. In some embodiments, the first frame part 23a is adjacent to the third frame part 23c and the fourth frame part 23d, and the second frame part 23b is adjacent to the third frame part 23c and the fourth frame part 23d. In other words, the frame parts 23a to 23d are connected to form the frame <NUM>.

In some embodiments, when the frame <NUM> is disposed in the opening <NUM>, the first outer peripheral surface part 23A1 corresponds to the first inner peripheral surface part 212A1, the second outer peripheral surface part 23A2 corresponds to the second inner peripheral surface part 212A2, the third outer peripheral surface part 23A3 corresponds to the third inner peripheral surface part 212A3, and the fourth outer peripheral surface part 23A4 corresponds to the fourth inner peripheral surface part 212A4.

Refer to <FIG> and <FIG>. <FIG> shows a section diagram of the frame <NUM> along the section line D-D' in <FIG>. <FIG> shows a section diagram of the frame <NUM> along the section line E-E' in <FIG>. Further, the groove set <NUM> of the frame <NUM> includes a first groove 231G1 and a second groove 231G2, the first groove 231G1 is formed on the first outer peripheral surface part 23A1 and includes two first protrusions 231P1, and the second groove 231G2 is formed on the second outer peripheral surface part 23A2 and includes two second protrusions 231P2.

Specifically, at the first frame part 23a, the two first protrusions 231P1 protrude on two ends of the first outer peripheral surface part 23A1 along the frame <NUM>, and thus the two first protrusions 231P1 and the first outer peripheral surface part 23A1 jointly form the first groove 231G1. At the second frame part 23b, the two second protrusions 231P2 protrude on two ends of the second outer peripheral surface part 23A2 along the frame <NUM>, and thus the two second protrusions 231P2 and the second outer peripheral surface part 23A2 jointly form the second groove 231G2.

On the other hand, at the third frame part 23c, the third outer peripheral surface part 23A3 of the frame <NUM> has a first flat area 23F1 and a protrusion 23P1. At the fourth frame part 23d, the fourth outer peripheral surface part 23A4 has a second flat area 23F2 and a protrusion 23P2. More specifically, the protrusion 23P1 protrudes only on one end of the third outer peripheral surface part 23A3 along the frame <NUM>, and the other end of the third outer peripheral surface part 23A3 without any protrusion forms the flat area 23F1 along the frame <NUM>. The protrusion 23P2 protrudes only on one end of the fourth outer peripheral surface part 23A4 along the frame <NUM>, and the other end of the fourth outer peripheral surface part 23A4 without any protrusion forms the flat area 23F2 along the frame <NUM>.

Refer to <FIG> and <FIG>. <FIG> shows a section diagram of the protection case assembly <NUM> along the section line B-B' in <FIG>. <FIG> shows a section diagram of the protection case assembly <NUM> along the section line C-C' in <FIG>. Specifically, when the frame <NUM> is disposed in the opening <NUM> of the backplate <NUM> of the main case <NUM>: (<NUM>) the first inner peripheral surface part 212A1 is fittingly received between the two first protrusions 231P1 of the first groove 231G1; (<NUM>) the second inner peripheral surface part 212A2 is fittingly received between the two second protrusions 231P2 of the second groove 231G2; (<NUM>) the third inner peripheral surface part 212A3 is adjacent to the first flat area 23F1 of the third outer peripheral surface part 23A3, and the protrusion 23P1 is abutted against the surface of the backplate <NUM> facing the accommodating space <NUM>; and (<NUM>) the fourth inner peripheral surface part 212A4 is adjacent to the second flat area 23F2 of the fourth outer peripheral surface part 23A4, and the protrusion 23P2 is abutted against the surface of the backplate <NUM> facing the accommodating space <NUM>.

In other words, it can be understand from the cross sections of the drawings, when the frame <NUM> is disposed in the opening <NUM> of the backplate <NUM> of the main case <NUM>: (<NUM>) the first frame part 23a forms the first 231G1 toward the first inner peripheral surface part 212A1, and the first inner peripheral surface part 212A1 is fittingly received between the two first protrusions 231P1 of the first groove 231G1; (<NUM>) the second frame part 23b forms the second groove 231G2 toward the second inner peripheral surface part 212A2, and the second inner peripheral surface part 212A2 is fittingly received between the two second protrusions 231P2 of the second groove 231G2; (<NUM>) the third frame part 23c substantially forms an L shape on the cross section, and the protrusion 23P1 of the L shape is abutted against the surface of the backplate <NUM> facing the accommodating space <NUM>; and (<NUM>) the fourth frame part 23d substantially forms an L shape on the cross section, and the protrusion 23P2 of the L shape is abutted against the surface of the backplate <NUM> facing the accommodating space <NUM>.

In some embodiments, when the frame <NUM> is disposed in the opening <NUM> of the backplate <NUM> of the main case <NUM>, the first protrusions 231P1 located in the accommodating space <NUM>, the second protrusions 231P2 located in the accommodating space <NUM>, the protrusion 23P1 of the third outer peripheral surface part 23A3 and the protrusion 23P2 of the fourth outer peripheral surface part 23A4 are connected and appear as an encirclement. Between the surface of the connected protrusions facing the accommodating space <NUM> and the surface of the backplate <NUM> facing the accommodating space <NUM> is a height difference H1. With the height difference H1, the frame <NUM> may pad the backplate <NUM> away from the back surface <NUM> of the handheld device <NUM>, so as to prevent the backplate <NUM> from directly contacting the back surface <NUM> of the handheld device <NUM>, thereby further avoiding water ripples generated when the backplate <NUM> contacts the back surface <NUM> of the handheld device <NUM>.

Refer to <FIG>. <FIG> shows a three-dimensional diagram of a protection case assembly <NUM> according to some embodiments of the present invention. <FIG> shows an exploded diagram of the protection case assembly <NUM> according to some embodiments of the present invention. <FIG> shows a schematic diagram of the protection case assembly <NUM> in use according to some embodiments of the present invention. Specifically, the protection case assembly <NUM> includes a main case <NUM> and a frame <NUM>. The main case <NUM> has an accommodating space <NUM> and a backplate <NUM>.

In some embodiments, the accommodating space <NUM> of the main case <NUM> is defined by a frame <NUM> and the backplate <NUM> of the main case <NUM>, and is configured to accommodate the handheld device <NUM>. The handheld device <NUM> is detachably disposed in the accommodating space <NUM> of the main case <NUM>. The handheld device <NUM> includes a lens module <NUM> provided on a back surface <NUM> of the handheld device <NUM>. The main case <NUM> is provided with an opening <NUM> on a position corresponding to the lens module <NUM> so as to expose the lens module <NUM>. The frame <NUM> is detachably disposed in the opening <NUM>.

Refer to <FIG>. <FIG> shows an enlarged partial diagram of the main case <NUM> according to some embodiments of the present invention. <FIG> shows a front view of the main case <NUM> in a direction D3 in <FIG> of the present invention. <FIG> shows a three-dimensional diagram of the frame <NUM> according to some embodiments of the present invention. <FIG> shows a front view of the frame <NUM> in a direction D4 in <FIG> of the present invention. Specifically, the opening <NUM> has an inner peripheral surface 312A encircling the opening <NUM>. The inner peripheral surface 312A defines the hole of the opening <NUM>, and is connected to an inner surface and an outer surface of the backplate <NUM>. Corresponding to the inner peripheral surface 312A, the frame <NUM> has an outer peripheral surface 33A encircling the frame <NUM>. A groove set <NUM> is formed on the outer peripheral surface 33A, and is configured to fittingly receive the main case <NUM> in the opening <NUM>.

More specifically, in some embodiments, the inner peripheral surface 312A of the opening <NUM> may be divided into a first inner peripheral surface part 312A1, a second inner peripheral surface part 312A2, a third inner peripheral surface part 312A3 and a fourth inner peripheral surface part 312A4. In the opening <NUM>, the first inner peripheral surface part 312A1 is opposite to the second inner peripheral surface part 312A2, and the third inner peripheral surface part 312A3 is opposite to the fourth inner peripheral surface part 312A4. In some embodiments, the third inner peripheral surface part 312A3 is adjacent to the first inner peripheral surface part 312A1 and the second inner peripheral surface part 312A2, and the fourth inner peripheral surface part 312A4 is adjacent to the first inner peripheral surface part 312A1 and the second inner peripheral surface part 312A2. In other words, the inner peripheral surface parts 312A1 to 312A4 are connected to form the inner peripheral surface 312A of the opening <NUM>.

On the other hand, in some embodiments, the outer peripheral surface 33A of the frame <NUM> may be divided into a first outer peripheral surface part 33A1, a second outer peripheral surface part 33A2, a third outer peripheral surface part 33A3 and a fourth outer peripheral surface part 33A4. In some embodiments, the third outer peripheral surface part 33A3 is adjacent to the first outer peripheral surface part 33A1 and the second outer peripheral surface part 33A2, and the fourth outer peripheral surface part 33A4 is adjacent to the first outer peripheral surface part 33A1 and the second outer peripheral surface part 33A2. In other words, the outer peripheral surface parts 33A1 to 33A4 are connected to form the outer peripheral surface 33A of the frame <NUM>.

In some embodiments, the frame <NUM> may be distinguished into a first frame part 33a, a second frame part 33b, a third frame part 33c and a fourth frame part 33d based on the first outer peripheral surface part 33A1, the second outer peripheral surface part 33A2, the third outer peripheral surface part 33A3 and the fourth outer peripheral surface part 33A4. In some embodiments, the first frame part 33a is adjacent to the third 33c and the fourth frame part 33d, and the second frame part 33b is adjacent to the third frame part 33c and the fourth frame part 33d. In other words, the frame parts 33a to 33d are connected to form the frame <NUM>.

In some embodiments, the first inner peripheral surface part 312A1 forms a protrusion 31P1, and the second inner peripheral surface part 312A2 form a protrusion 31P2. The protrusions 31P1 and 31P2 are disposed opposite to each other in the opening <NUM>, and the thicknesses of the protrusions 31P1 and 31P2 are less than the thickness of the backplate <NUM>. When the frame <NUM> is disposed in the opening <NUM>, the first outer peripheral surface part 33A1 and the first frame part 33a correspond to the first inner peripheral surface part 312A1 and the protrusion 31P1, the second outer peripheral surface part 33A2 and the second frame part 33b correspond to the second inner peripheral surface part 312A2 and the protrusion 31P2, the third outer peripheral surface part 33A3 and the third frame part 33c correspond to the third inner peripheral surface part 312A3, and the fourth outer peripheral surface part 33A4 and the fourth frame part 33d correspond to the fourth inner peripheral surface part 312A4.

Refer to <FIG> and <FIG>. <FIG> shows a section diagram of the frame <NUM> along the section line H-H' in <FIG>. <FIG> shows a section diagram of the frame <NUM> along the section line I-I' in <FIG>. Further, the groove set <NUM> of the frame <NUM> includes a first groove 331G1 and a second groove 331G2, the first groove 331G1 is formed on the first outer peripheral surface part 33A1 and includes two first protrusions 331P1, and the second groove 331G2 is formed on the second outer peripheral surface part 33A2 and includes two second protrusions 331P2.

More specifically, at the first frame part 33a, the two first protrusions 331P1 protrude on two ends of the first peripheral surface part 33A1 along the frame <NUM>, and thus the two first protrusions 331P1 and the first outer peripheral surface part 33A1 jointly form the first groove 331G1. At the second frame part 33b, the two second protrusions 331P2 protrude on two ends of the second outer peripheral surface part 33A2 along the frame <NUM>, and thus the two protrusions 331P2 and the second peripheral surface part 33A2 jointly form the second groove 331G2.

On the other hand, at the third frame part 33b, the third outer peripheral surface part 33A3 of the frame <NUM> has a first flat area 33F1 and a protrusion 33P1. At the fourth frame part 33d, the fourth outer peripheral surface part 33A4 has a second flat area 33F2 and a protrusion 33P2. More specifically, the protrusion 33P1 protrudes only on one end of the third peripheral surface part 33A3 along the frame <NUM>, and the other end of the third outer peripheral surface part 33A3 without any protrusion forms the flat area 33F1 along the frame <NUM>. The protrusion 33P2 protrudes only on one end of the fourth outer peripheral surface part 33A4 along the frame <NUM>, and the other end of the fourth outer peripheral surface part 33A4 without any protrusion forms the flat area 33F2 along the frame <NUM>.

Refer to <FIG> and <FIG>. <FIG> shows a section diagram of the protection case assembly <NUM> along the second line F-F' in <FIG>. <FIG> shows a section diagram along the section line G-G' in <FIG>. Specifically, when the frame <NUM> is disposed in the opening <NUM> of the backplate <NUM> of the main case <NUM>: (<NUM>) the protrusion 31P1 formed on the first inner peripheral surface part 312A1 is fittingly received between the two first protrusions 331P1 of the first groove 331G1; (<NUM>) the protrusion 31P2 formed on the second inner peripheral surface part 312A2 is fittingly received between the two second protrusions 331P2 of the second groove 331G2; (<NUM>) the third inner peripheral surface part 312A3 is adjacent to the first flat area 33F1 of the third outer peripheral surface part 33A3, and the protrusion 33P1 is abutted against a surface of the backplate <NUM> facing the accommodating space <NUM>; and (<NUM>) the fourth inner peripheral surface part 312A4 is adjacent to the flat area 33F2 of the fourth outer peripheral surface part 33A4, and the protrusion 33P2 is abutted against the surface of the backplate <NUM> facing the accommodating space <NUM>.

In other words, it can be understand from the cross sections of the drawings, when the frame <NUM> is disposed in the opening <NUM> of the backplate <NUM> of the main case <NUM>: (<NUM>) the first frame part 33a forms the first groove 331G1 toward the protrusion 31P1 of the first inner peripheral surface part 312A1, and the protrusion 31P1 of the first inner peripheral surface part 312A1 is fittingly received between the two first protrusions 331P1 of the first groove 331G1; (<NUM>) the second frame part 33b forms the second groove 331G2 toward the protrusion 31P2 of the second inner peripheral surface part 312A2, and the protrusion 31P2 of the second inner peripheral surface part 312A2 is fittingly received between the two second protrusions 331P2 of the second groove 331G2; (<NUM>) the third frame part 33c substantially forms an L shape on the cross section, and the protrusion 33P1 of the L shape is abutted against the surface of the backplate <NUM> facing the accommodating space <NUM>; and (<NUM>) the fourth frame part 33d substantially forms an L shape on the cross section, and the protrusion33P2 of the L shape is abutted against the surface of the backplate <NUM> facing the accommodating space <NUM>.

In some embodiments, the thickness of the protrusion 31P1 is less than the thickness of the backplate <NUM>. Therefore, when: (<NUM>) the protrusion 31P1 is fittingly received between the two first protrusions 331P1 of the first groove 331G1; (<NUM>) the protrusion 32P1 is fittingly received between the two second protrusions 331P2 of the second groove 331G2; (<NUM>) the third inner peripheral surface part 312A3 is adjacent to the first flat area 33F1 of the third outer peripheral surface part 33A3; and (<NUM>) the fourth inner peripheral surface part 312A4 is adjacent to the second flat area 33F2 of the fourth outer peripheral surface part 33A4, the plane of the frame <NUM> facing the exterior and the outer plane of the backplate <NUM> are substantially coplanar. In other words, when the frame <NUM> is disposed in the opening <NUM>, when observing from the outer side of the backplate <NUM> relative to the accommodating space <NUM>, the frame <NUM> does not appear bulging relative to the outer plane of the backplate <NUM>.

It should be noted that, in some embodiments, the cross section at the opening <NUM> shown in <FIG> crosses the cross section at the opening <NUM> shown in <FIG>, and the cross section in <FIG> and the cross section in <FIG> both cross an extension surface of the backplate <NUM>. In some embodiments, the cross section at the opening <NUM> shown in <FIG> is substantially perpendicular to the cross section at the opening <NUM> shown in <FIG>, and the cross section in <FIG> and the cross section in <FIG> are both substantially perpendicular to an extension surface of the backplate <NUM>.

In some embodiments, when the frame <NUM> is disposed in the opening <NUM> of the backplate <NUM> of the main case <NUM>, a first flange 331P1 located in the accommodating space <NUM>, the second flange 331P2 located in the accommodating space <NUM>, a third flange 33P1 of the third outer peripheral surface part 33A3 and a flange 33P2 of the fourth outer peripheral surface part 33A4 are connected and form an encirclement.

In some embodiments, the frame <NUM> includes a pad portion <NUM>. When the frame <NUM> is disposed in the opening <NUM>, the pad portion <NUM> protrudes toward the accommodating space <NUM>. Between the surface of the pad <NUM> facing the accommodating space <NUM> and the surface of the backplate <NUM> facing the accommodating space <NUM> is a height difference H2. With the height difference H2, the backplate <NUM> may be padded away from the back surface of the handheld device <NUM>, so as to prevent the backplate <NUM> from directly contacting the back surface of the handheld device <NUM>, thereby further avoiding water ripples generated when the backplate <NUM> contacts the back surface of the handheld device <NUM>.

In some embodiments, when the main case <NUM> and the backplate <NUM> are made of a translucent (for example, transparent or partially transparent) and soft material, the frame <NUM> and the pad portion <NUM> may significantly pad the backplate <NUM> away from the back surface of the handheld device <NUM> so as to avoid water ripples. In some embodiments, when the main case <NUM> and the backplate <NUM> are made of a translucent and hard material, the frame <NUM> and the pad portion <NUM> may even better pad the backplate <NUM> away from the back surface of the handheld device <NUM> and thus the effect of avoiding water ripples is even more noticeable.

In some embodiments, the height difference H2 between the protruding surface of the pad portion <NUM> and the surface of the backplate <NUM> is between <NUM> and <NUM>. In some embodiments, the height difference H2 between the protruding surface of the pad portion <NUM> and the surface of the backplate <NUM> is approximately <NUM>. In some embodiments, the pad portion <NUM> may in plural in quantity, and the plurality of pad portions <NUM> are respectively arranged on different positions of the frame <NUM>. In some embodiments, the shape of the pad portion <NUM> corresponds to the encirclement of the frame <NUM>, and is disposed at the frame <NUM> correspondingly to the encirclement of the frame <NUM>.

According to the invention, the material hardness of the groove set <NUM> is more than the material hardness of the pad portion <NUM>. Specifically, the material of the groove set <NUM> includes a hard material, such as acrylonitrile-butadiene-styrene copolymer (ABS), so as to enhance the stability of the frame <NUM> fittingly received at the main case <NUM>. The material of the pad portion <NUM> includes a soft material, such as thermoplastic polyurethane (TPU), so as to avoid scratching of the back surface <NUM> of the handheld device <NUM> caused by contacting the back surface <NUM> of the handheld device <NUM>. Meanwhile, because a soft material has higher flexibility, the fitting effect with the back surface <NUM> of the handheld device <NUM> may be increased, hence preventing dust from entering from the opening <NUM> to a gap between the handheld device <NUM> and the backplate <NUM>.

Claim 1:
A protection case assembly (<NUM>) for a handheld device (<NUM>), the protection case assembly (<NUM>) comprising:
a main case (<NUM>), comprising:
an accommodating space (<NUM>), configured to accommodate a handheld device (<NUM>);
an opening (<NUM>), provided correspondingly to a lens module (<NUM>) of the handheld (<NUM>) device; and
a frame (<NUM>), detachably disposed in the opening (<NUM>), comprising:
a groove set (<NUM>), configured to receive the main case (<NUM>) in the opening (<NUM>);
said protection case assembly (<NUM>) further comprises
a backplate (<NUM>) corresponding to a back surface of the handheld device (<NUM>), wherein the opening is provided on the backplate (<NUM>), and the groove set (<NUM>) is configured to receive the backplate (<NUM>) of the main case (<NUM>) in the opening (<NUM>); and
said frame (<NUM>) further includes
a pad portion (<NUM>), protruding toward the accommodating space (<NUM>) when the frame (<NUM>) is disposed in the opening (<NUM>),
characterized in that material hardness of the groove set is more than material hardness of the pad portion.