Abstract:
An electronic low-frequency pulse patch of a one-piece structure is disclosed, which has a power supply and a circuit capable of outputting positive and negative current pulses concealed therein, and in which, without use of a flexible ribbon cable set and an additional fastener, a host unit and a coupling conductive patch unit assembly are joined together with the appearance to form a one-piece seamless water-proof structure for use as a self-adhesion patch device capable of generating a low-frequency pulse output.

Description:
BACKGROUND OF THE INVENTION 
       [0001]    1. Technical Field 
         [0002]    The present invention relates to a patch for pain treatment and relieving, and more particularly, to an electronic low-frequency pulse patch of a one-piece structure having a simple structure in which electronic circuitry and mechanical appearance are formed integrally, being adapted to be attached to a human body and being bendable. This electronic low-frequency pulse patch of a one-piece structure can be applied to various electronic patches for treating or relieving pain. 
         [0003]    2. Description of Related Art 
         [0004]    A feeling of aching pain often arises after one has worked for an extended period of time or has taken strenuous exercises. According to a lot of information that had been verified or disclosed by documents published at home and abroad as well as by the Food and Drug Administration (FDA) of America, low-frequency pulses are effective in treating or relieving the pain, although this will not be further described herein. For this reason, most of low-frequency massage pads available in the market comprise a piece of conductive fabric intended to make contact with a human body and a function selection controller electrically connected to the conductive fabric via a conductive wire. However, use of the conductive wire causes inconveniences in use; even further, use of the conductive wire imposes a limitation on the distance from a user to a host machine, making it inconvenient to use when the patient is positioned at a certain distance from the host machine. 
         [0005]    Furthermore, such a low-frequency massage pad with a function selection controller and a piece of conductive cloth is relatively costly to manufacture because it is provided with a plurality of frequency control functions; and the function selection controller has a certain volume, which makes it inconvenient for the user to carry the massage pad for use. As a consequence, it is difficult to put such a low-frequency massage pad into practical use. 
         [0006]    Accordingly, a kind of wireless portable low-frequency treatment unit has been developed. For example, an electronic acupuncture and moxibustion device of a quick-attachment structure is disclosed in Taiwan Patent No. 246840, according to which a hard plastic enclosure is used to assemble batteries and an output circuit (portion) therein and is then joined to a conductive patch by means of a metallic fastener. However, the human body has different curvature at different sites, so the hard enclosure must be made separately from the patch and then, by means of the metallic fastener, fixed to the conductive patch before the device as a whole is attached to a specific site on the human body. This is very inconvenient, adds to the implementation complexity and discourages the user from using such a device, making it difficult to put such a device into practical use. Furthermore, as it requires use of a lot of elements, the manufacturing cost is increased. Moreover, difficulty in bending the metallic fastener makes it inconvenient to operate by the user. 
         [0007]    To solve the afore-mentioned problems, a conventional electronic low-frequency pulse patch of a one-piece structure has been proposed. Referring to  FIG. 1 , there is shown an exploded structural view of the conventional electronic low-frequency pulse patch of a one-piece structure. As shown, the conventional electronic low-frequency pulse patch of a one-piece structure  10  comprises a flexible top cover body  11  as an enclosure, in which a first receiving space  12  and a second receiving space  13  are formed. The first receiving space  12  has a power supply unit  14  disposed therein to supply power necessary for operation of the electronic low-frequency pulse patch of a one-piece structure  10  that is flexible and water proof. Above the power supply unit  14  inside the first receiving space  12  is disposed a first push switch  15  configured to control operation of the power supply unit  14 . Below the power supply unit  14  is disposed a first pole low-frequency output unit region  17 . Within the second receiving space  13  is disposed a low-frequency output unit  16  configured to output low-frequency current pulses during operation of the electronic low-frequency patch. Above a support structure  16  inside the second receiving space  13  is disposed a second push switch  151  configured to control operation of the support structure  16 , and below the support structure  16  is disposed a second pole low-frequency output unit region  18 . Between the first pole low-frequency output unit region  17  and the second pole low-frequency output unit region  18  is disposed a flexible ribbon cable assembly  19  adapted to establish electrical connection between the first pole low-frequency output unit region  17  and the second pole low-frequency output unit region  18 . Below the flexible top cover body  11  is covered a coupling output conductive flexible film  20  made of polyester (PET). In the coupling output conductive flexible film  20  are formed a first opening  201  and a second opening  202  disposed corresponding to the first pole low-frequency output unit region  17  and the second pole low-frequency output unit region  18  respectively so that specific portions of the first pole low-frequency output unit region  17  and the second pole low-frequency output unit region  18  are exposed through the first opening  201  and the second opening  202 . Hence, the specific portions of the first pole low-frequency output unit region  17  and the second pole low-frequency output unit region  18  can be electrically coupled with a first pole coupling conductive patch  21  and a second pole coupling conductive patch  22  and also can be attached to the user&#39;s skin to perform low-frequency massage thereon. 
         [0008]    During use of such an electronic low-frequency pulse patch of a one-piece structure  10  on a human body, damage, poor contact and even open-circuit tend to occur to the flexible ribbon cable assembly  19  of the patch  10  due to frequent bending to conform to the human body&#39;s curvature or due to pulling or bending by an external force, causing failure of the electronic low-frequency pulse patch of a one-piece structure  10 . Therefore, it is difficult to put such a patch into practical use. Moreover, design of such a patch does not allow for replacement of the batteries, and once power of the batteries runs out, the patch will no longer be of use, which is very inconvenient for the user. 
         [0009]    As described above, efforts have to been made to provide a wireless portable low-frequency treatment device that can eliminate need of using any metallic fastener to join the host unit and the conductive patch into an integrally formed flexible water-proof structure and can present prolonged service life. 
       BRIEF SUMMARY OF THE INVENTION 
       [0010]    To solve the afore-mentioned problems, an electronic low-frequency pulse patch of a one-piece structure is proposed in the present invention, which has a power supply and a circuit capable of outputting positive and negative current pulses concealed therein without need of any other fastening means, and can be attached to different sites of a human body independently as desired. Additionally, as the circuit is concealed within the flexible one-piece structure and is bendable, the patch can be attached onto a human body in conformity with the human body&#39;s curvature, which makes it very easy to use and remarkably increases the popularity to users. 
         [0011]    An electronic low-frequency pulse patch of a one-piece structure disclosed in the present invention comprises: a flexible top cover body, having a receiving space formed therein; a hollow supporting enclosure, being disposed in the receiving space, wherein above the hollow supporting enclosure are disposed a first cantilever elastic pushing end and a second cantilever elastic pushing end, both of which are coupled with an inner surface of the flexible top cover body; a control circuit unit, being disposed within the hollow supporting enclosure, wherein the control circuit unit is provided with at least one first low-frequency pulse output end, at least one second low-frequency pulse output end as well as a first control end and a second control end, and the first control end and the second control end are coupled to the first cantilever elastic pushing end and the second cantilever elastic pushing end respectively, and the pulses outputted from the at least one first low-frequency pulse output end and the at least one second low-frequency pulse output end can be adjusted according to the number of times that the first cantilever elastic pushing end and the second cantilever elastic pushing end being triggered, a power supply unit, being electrically coupled to the control circuit unit to supply power necessary for operation of the control circuit unit; a base, being joined to the bottom of the hollow supporting enclosure to fix the control circuit unit and the power supply unit into the hollow supporting enclosure, wherein the base is provided with at least one first conductive end electrically coupled to the at least one first low-frequency pulse output end and at least one second conductive end electrically coupled to the at least one second low-frequency pulse output end; and a coupling output conductive flexible film, being joined integrally to the bottom of the flexible top cover body, wherein the coupling output conductive flexible film is formed with an opening at a center thereof, at the periphery of the opening are disposed at least one first conductive contact lug electrically connected to the at least one first conductive end and at least one second conductive contact lug electrically connected to the at least one second conductive end, and on a bottom surface of the coupling output conductive flexible film are disposed a first low-frequency pulse output region electrically connected to the at least one first conductive contact lug and a second low-frequency pulse output region electrically connected to the at least one second conductive contact lug. 
         [0012]    According to an embodiment of the present invention, a method for manufacturing an electronic low-frequency pulse patch of a one-piece structure is provided, which comprises the following steps: 
         [0013]    providing a flexible top cover body, which has a receiving space formed therein; disposing above a hollow supporting enclosure a first cantilever elastic pushing end and a second cantilever elastic pushing end, and disposing the hollow supporting enclosure into the receiving space in such a way that both the first cantilever elastic pushing end and the second cantilever elastic pushing end are coupled with an inner surface of the flexible top cover body; disposing in a control circuit unit at least one first low-frequency pulse output end, at least one second low-frequency pulse output end as well as a first control end and a second control end in such a way that the first control end and the second control end are coupled to the first cantilever elastic pushing end and the second cantilever elastic pushing end respectively and pulses outputted from the at least one first low-frequency pulse output end and the at least one second low-frequency pulse output end can be adjusted according to the number of times that the first cantilever elastic pushing end and the second cantilever elastic pushing end are triggered; disposing the control circuit unit into the hollow supporting enclosure; providing a power supply unit, which is electrically coupled to the control circuit unit to supply power necessary for operation of the control circuit unit; disposing on a base at least one first conductive end electrically coupled to the at least one first low-frequency pulse output end and at least one second conductive end electrically coupled to the at least one second low-frequency pulse output end; forming an opening at a center of a coupling output conductive flexible film, disposing at the periphery of the opening at least one first conductive contact lug and at least one second conductive contact lug, and disposing on a bottom surface of the coupling output conductive flexible film a first low-frequency pulse output region electrically connected to the at least one first conductive contact lug and a second low-frequency pulse output region electrically connected to the at least one second conductive contact lug; and joining the base to the bottom of the hollow supporting enclosure to fix the control circuit unit and the power supply unit into the hollow supporting enclosure, and electrically connecting the first conductive contact lug to the first conductive end and electrically connecting the second conductive contact lug to the second conductive end. 
     
    
     
       BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS 
         [0014]    The invention as well as a preferred mode of use and advantages thereof will be best understood by referring to the following detailed description of an illustrative embodiment in conjunction with the accompanying drawings, wherein: 
           [0015]      FIG. 1  is an exploded structural view of a conventional electronic low-frequency pulse patch of a one-piece structure; 
           [0016]      FIG. 2  is an exploded structural view of an electronic low-frequency pulse patch of a one-piece structure of the present invention; 
           [0017]      FIG. 3  is a schematic outline view of a hollow supporting enclosure of the present invention; 
           [0018]      FIG. 4(   a ) is a schematic front outline view of a control circuit unit of the present invention; 
           [0019]      FIG. 4(   b ) is a schematic back outline view of the control circuit unit of the present invention; 
           [0020]      FIG. 5  is a schematic outline view of a base of the present invention; 
           [0021]      FIG. 6  is a schematic outline view of a coupling output conductive flexible film of the present invention; 
           [0022]      FIG. 7  is a schematic outline view of a protective layer of the present invention; and 
           [0023]      FIG. 8  is a flowchart of a method for manufacturing an electronic low-frequency pulse patch of a one-piece structure of the present invention. 
       
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
       [0024]    Detailed disclosures and technical essence of the present invention will be described as follows. 
         [0025]      FIG. 2  illustrates an exploded structural view of an electronic low-frequency pulse patch of a one-piece structure of the present invention. As shown, the electronic low-frequency pulse patch of a one-piece structure  30  primarily consists of a flexible top cover body  31 , a hollow supporting enclosure  32 , a control circuit unit  33 , a base  34 , a power supply unit  35  and a coupling output conductive flexible film  37 . The flexible top cover body  31 , which functions as an enclosure, may be made of either of a flexible water-proof silicone material and a TPU material. On the flexible top cover body  31  are formed a first symbol  312 , which is a “+” sign, and a second symbol  313 , which is a “−” sign, although they may also be replaced with any symbols. The flexible top cover body  31  has a receiving space  311  formed therein. Additionally, the first symbol  312  and the second symbol  313  may both be a relief symbol to make it easier for those visually impaired to know meanings represented by the first symbol  312  and the second symbol  313  by touching them. 
         [0026]    The hollow supporting enclosure  32  is disposed within the receiving space  311 . A first cantilever elastic pushing end  321  and a second cantilever elastic pushing end  322  are disposed on the hollow supporting enclosure  32  in such a way that both the first cantilever elastic pushing end  321  and the second cantilever elastic pushing end  322  are coupled to an inner surface of the flexible top cover body  31 , with positions of the first cantilever elastic pushing end  321  and the second cantilever elastic pushing end  322  corresponding to those of the first symbol  312  and the second symbol  313  respectively. Both the first cantilever elastic pushing end  321  and the second cantilever elastic pushing end  322  are of an elastic cantilever design, so when being pushed, they will elastically return back to the original positions to allow for another pushing operation for triggering. Also, to avoid confusion during assembly, the first cantilever elastic pushing end  321  and the second cantilever elastic pushing end  322  may be provided with the first symbol  312  and the second symbol  313  respectively on a respective surface thereof. In this way, reversed assembled positions of the first cantilever elastic pushing end  321  and the second cantilever elastic pushing end  322  can be avoided. Referring to  FIG. 3  together, a plurality of through-slots  323  is disposed at a periphery of the hollow supporting enclosure  32  to facilitate integral joining of the hollow supporting enclosure  32  and the base  34 . 
         [0027]    Referring to  FIG. 4(   a ) and  FIG. 4(   b ) together, the control circuit unit  33  is disposed within the hollow supporting enclosure  32 , and is provided with at least one first low-frequency pulse output end  333 , at least one second low-frequency pulse output end  334  as well as a first control end  331  and a second control end  332 . The first control end  331  and the second control end  332  are coupled to the first elastic cantilever pushing end  321  and the second elastic cantilever pushing end  322  of the hollow support enclosure  32  respectively so that pulses outputted from the at least one first low-frequency pulse output end  333  and the at least one second low-frequency pulse output end  334  can be adjusted according to the number of times that the first elastic cantilever pushing end  321  and the second elastic cantilever pushing end  322  are triggered. The control circuit unit  33  is electrically coupled to the power supply unit  35  to supply power necessary for operation of the control circuit unit  33 . Additionally, the control circuit unit  33  may further be provided with a power contact end  335  so as to be electrically connected to the power supply unit  35  directly. 
         [0028]    The base  34  is joined to the bottom of the hollow supporting enclosure  32  to fix the control circuit unit  33  and the power supply unit  35  into the hollow supporting enclosure  32 . Referring to  FIG. 5  together, on the base  34  are disposed at least one first conductive end  341  electrically coupled to the at least one first low-frequency pulse output end  333  of the control circuit unit  33  and at least one second conductive end  342  electrically connected to the at least one second low-frequency pulse output end  334 . This represents that the electronic low-frequency pulse patch of a one-piece structure  30  of the present invention has one or more sets of positive &amp; negative outputs (i.e., the first low-frequency pulse output end  333  is considered as a positive output, and the second low-frequency pulse output end  334  is considered as a negative output). Additionally, at a periphery of the base  34  is disposed a plurality of elastic snap-fitting pieces  343  adapted to be elastically snap-fitted into the through-slots  323  of the hollow supporting enclosure  32  so that the base  34  and the hollow supporting enclosure  32  can be joined into one piece firmly. Furthermore, the base  34  may be formed with a through-hole  344 , which can be closed by a bottom cover body  36 , at a center thereof to facilitate replacement of the power supply unit  35  when the power level becomes insufficient. The power supply unit  14  may be any of a button cell, a lithium cell and a mercury cell. 
         [0029]    The coupling output conductive flexible film  37  is joined integrally to the bottom of the flexible top cover body  31  and is formed with an opening  371  at a center thereof. At a periphery of the opening  371  are disposed at least one first conductive contact lug  372  electrically connected to the at least one first conductive end  341  of the base  34  and at least one second conductive contact lug  373  electrically connected to the at least one second conductive end  342  of the base  34 . Referring to  FIG. 6  together, on a bottom surface of the coupling output conductive flexible film  37  are further disposed a first low-frequency pulse output region  374  electrically connected to the at least one first conductive contact lug  372  and a second low-frequency pulse output region  375  electrically connected to the at least one second conductive contact lug  373 . Additionally, the coupling output conductive flexible film  37  is made of PET, and the first low-frequency pulse output region  374  and the second low-frequency pulse output region  375  disposed on the bottom surface thereof are made of a printed conductive material. Further, the coupling output conductive flexible film  37  may be formed by a first conductive flexible film and a second conductive flexible film that are bilaterally symmetric with each other in combination, with the opening  371  being disposed therebetween. The at least one first conductive contact lug  372  is disposed at a periphery of the opening  371  in the first conductive flexible film, and at least one second conductive contact lug  373  is disposed at a periphery of the opening  371  in the first conductive flexible film. The first low-frequency pulse output region  374  and the second low-frequency pulse output region  375  are disposed on respective bottom surfaces of the first conductive flexible film and the second conductive flexible film respectively. 
         [0030]    In the electronic low-frequency pulse patch of a one-piece structure  30  of the present invention, the flexible top cover body  31  is used as an enclosure, the coupling output conductive flexible film  37  is attached, by virtue of the self-adhesion property thereof, onto the bottom of the flexible top cover body  31 , and the first low-frequency pulse output region  374  and the first low-frequency pulse output region  375  are disposed at both sides of the coupling output conductive flexible film  37 , so the electronic low-frequency pulse patch of a one-piece structure  30  is bendable and can be bent to conform to different curvature of different sites of the human body without use of any screw or other means for fixing. 
         [0031]    Additionally, because the electronic low-frequency pulse patch of a one-piece structure  30  of the present invention has the power supply unit  35  and the hollow supporting enclosure  32  integrated into the flexible top cover body  31 , the volume thereof is remarkably decreased as compared to common low-frequency massage pads. This makes the patch cheaper to manufacture and more convenient to be carried about, and the one-piece design in which the coupling output conductive flexible film  37  is attached to the flexible top cover body  31  provides a better water-proof effect, all of which make the patch very convenient to use. 
         [0032]    Furthermore, in the electronic low-frequency pulse patch of a one-piece structure  30  of the present invention, electrical conduction is accomplished by electrically connecting the at least one first conductive end  341  and the at least one second conductive end  342  of the base  34  to the at least one first conductive contact lug  372  and the at least one second conductive contact lug  373  of the coupling output conductive flexible film  37  respectively, so when electrically connected, the at least one first conductive contact lug  372  and the at least one second conductive contact lug  373  will be pushed upwards by and attached integrally to the at least one first conductive end  341  and the at least one second conductive end  342  of the base  34  to form a conductive bridge structure. On the other hand, the at least one first conductive contact lug  372  and the at least one second conductive contact lug  373  are warped to contact the at least one first conductive end  341  and the at least one second conductive end  342  respectively when the coupling output conductive flexible film  37  being joined integrally to the bottom of the flexible top cover body  31 . Therefore, by joining the hollow supporting enclosure  32  to the base  34 , the structure can be fixed to make the bridge structure less likely to get loose due to the warping recovering force of the at least one first conductive contact lug  372  and the at least one second conductive contact lug  373 . Thus, use of the conventional flexible ribbon cable is eliminated, and when the electronic low-frequency pulse patch of a one-piece structure  30  is bent, the junction will not be bent accordingly. This can avoid occurrences of damage and open-circuit faults, thereby prolonging the service life of the patch. 
         [0033]    When the electronic low-frequency pulse patch of a one-piece structure  30  of the present invention is to be used, after the patch  30  is attached to a specific site of a human body, the user may press the first symbol  312  to trigger the first cantilever elastic pushing end  321  and the first control end  331 . As a result, power necessary for outputting low-frequency pulses from the first low-frequency pulse output region  374  is supplied by the power supply unit  35  through the first low-frequency pulse output end  333 , the first conductive end  341  and the first conductive contact lug  372  and, further through the second low-frequency pulse output region  375 , the second conductive contact lug  373 , the second conductive end  342  and the second low-frequency pulse output end  334 , an electrical circuit is completed with the first low-frequency pulse output region  374  and the second low-frequency pulse output region  375  in contact with the human body serving as a negative electrode and a positive electrode respectively of the electrical circuit. Thus, electronic pulses (low-frequency) generated by the circuit control unit  33  are transferred to the human body for purpose of pain relieving and rehabilitation treatment. 
         [0034]    Additionally, below the coupling output conductive flexible film  37  may be disposed a coupling conductive patch assembly  38 , which includes a first coupling conductive patch  381  that can be adhered correspondingly to the first low-frequency pulse output region  374  and a second coupling conductive patch  382  that can be adhered correspondingly to the second low-frequency pulse output region  375 . This can prevent electronic pulses (low-frequency) generated by the circuit control unit  33  from being applied directly onto the human body so as to cushion the impact strength of the electronic pulses (low-frequency) or mitigate the burning sensation. 
         [0035]    Electronic pulse waveforms applicable to pain relieving treatment are categorized into: (1) dense wave, which is commonly used for pain relief, sedation, alleviation of spasm of muscles and blood vessels, and acupuncture anesthesia; (2) sparse wave, which is commonly used for treatment of atrophy and damage of various muscles, joints, ligaments or muscle tendons; (3) spare-dense wave, which is formed by sparse waves and dense waves appearing alternately and is commonly used for pain relief as well as treatment of sprains and strains, periarthritis, disorder of circulation of Qi and blood, ischialgia, facial paralysis, myasthenia and local frostbites; (4) sawtooth wave, which is a kind of fluctuating wave formed by modulating pulse amplitudes with a sawtooth form and may be used to stimulate phrenic nerves for purpose of artificial electro-respiration or for rescuing a patient suffering from respiratory failure, and also functions to enhance neuromuscular irritability, regulate functions of meridians and collaterals, and improve circulation of Qi and blood; (5) discontinuous wave, which is a kind of sparse wave that varies automatically in a rhythmic and intermittent manner and is commonly used for treatment of atrophy and paralysis and also for electro-muscle gymnastic exercises. Hence, the electronic low-frequency pulse patch of a one-piece structure  30  of the present invention may also provide various electronic pulse waves for pain relief and treatment by adjusting the number of times that the first control end  331  and the second control end  332  are triggered, and this setting process or approach may be built into the circuit control unit  33 . Thus, the user may adjust the low-frequency wave into a necessary waveform depending on his or her own symptom, which represents a very humane design. 
         [0036]    Referring to  FIG. 8 , there is shown a flowchart of a method for manufacturing an electronic low-frequency pulse patch of a one-piece structure of the present invention. As shown, firstly, a flexible top cover body is provided, which has a receiving space formed therein (step S 1 ). Then, a first cantilever elastic pushing end and a second cantilever elastic pushing end are disposed above the hollow supporting enclosure, and the hollow supporting enclosure is disposed into the receiving space in such a way that both the first cantilever elastic pushing end and the second cantilever elastic pushing end are coupled with an inner surface of the flexible top cover body (step S 2 ). Next, at least one first low-frequency pulse output end, at least one second low-frequency pulse output end as well as a first control end and a second control end are disposed in a control circuit unit (step S 3 ), and the first control end and the second control end are coupled to the first cantilever elastic pushing end and the second cantilever elastic pushing end respectively and pulses outputted from the at least one first low-frequency pulse output end and the at least one second low-frequency pulse output end can be adjusted according to the number of times that the first cantilever elastic pushing end and the second cantilever elastic pushing end are triggered (step S 4 ). Subsequent to step S 4 , the control circuit unit is disposed into the hollow supporting enclosure (step S 5 ), and a power supply unit electrically coupled to the control circuit unit is provided to supply power necessary for operation of the control circuit unit (step S 6 ). Subsequent to step S 6 , at least one first conductive end electrically coupled to the at least one first low-frequency pulse output end and at least one second conductive end electrically coupled to the at least one second low-frequency pulse output end are disposed on a base (step S 7 ). Thereafter, an opening is formed at a center of a coupling output conductive flexible film, at least one first conductive contact lug and at least one second conductive contact lug are disposed at the periphery of the opening, and a first low-frequency pulse output region electrically connected to the at least one first conductive contact lug and a second low-frequency pulse output region electrically connected to the at least one second conductive contact lug are disposed on a bottom surface of the coupling output conductive flexible film (step S 8 ). Finally, the base is joined to the bottom of the hollow supporting enclosure to fix the control circuit unit and the power supply unit into the hollow supporting enclosure, and the at least one first conductive contact lug and the at least one second conductive contact lug are warped to contact the at least one first conductive end and the at least one second conductive end, respectively. (step S 9 ). 
         [0037]    The aforementioned flexible top cover body may be made of either of a flexible water-proof silicone material and a TPU material. On the flexible top cover body are formed a first symbol, which is a “+” sign, and a second symbol, which is a “−” sign. The first symbol and the second symbol may both be a relief symbol to make it easier for those visually impaired to identify them by touching. The hollow supporting enclosure is formed, at a periphery thereof, with a plurality of through-slots for a plurality of elastic snap-fitting pieces disposed at a periphery of the base to be integrally snap-fitted therein and to fix the bridge structure. The at least one first conductive contact lug is electrically connected to the at least one first conductive end, and the at least one second conductive contact lug is electrically connected to the at least one second conductive end. Additionally, the coupling output conductive flexible film is made of PET, and the first low-frequency pulse output region and the second low-frequency pulse output region disposed on the bottom surface thereof are made of a printed conductive material. Furthermore, a coupling conductive patch assembly may be disposed beneath the coupling output conductive flexible film, including a first coupling conductive patch that may be correspondingly adhered to the first low-frequency pulse output region and a second coupling conductive patch that may be correspondingly adhered to the second low-frequency pulse output region, which can prevent electronic pulses (low-frequency) generated by the circuit control unit from being applied directly onto the human body so as to cushion the impact strength of the electronic pulses (low-frequency) or mitigate the burning sensation.