TWI771789B - Charging gun and strain relief structure thereof - Google Patents

Abstract

A charging gun is disclosed and includes a cable, a housing and a strain relief structure. The housing includes a first housing and a second housing, wherein the first housing is detachably assembled with the second housing. The strain relief structure includes a first portion, a second portion and a plurality of first ring-shaped protrusions. The first portion is detachably assembled with the second portion, the first portion is disposed on the first housing, and the second portion is disposed on the second housing. When the first housing is assembled with the second housing, the first portion is assembled with the second portion, and at least a part of a surface of the cable is covered by the strain relief structure, and the strain relief structure is clamped between the cable and the housing.

Description

Charging gun and its stress relief structure

This case is about a charging device, especially a charging gun with a stress relief structure.

Generally speaking, the charging equipment includes a charging gun and a power supply device, and the power supply device and the external device are connected by the charging gun, so that the power supply device charges the external device. The cable of the charging gun, such as the power cord, is often bent during use, so that the cable near the connection terminal may be broken due to excessive stress.

At present, many charging guns on the market are provided with a stress relief structure near the connection terminal of the cable. The stress relief structure is an integrally formed annular structure, and the stress relief structure is arranged around the outer side of the cable. However, the above-mentioned cables are usually threaded into the stress relief structure by manual assembly, and lubricating oil must be smeared on the inner edge of the stress relief structure before assembly to reduce the frictional force of the assembly, resulting in a time-consuming and inconvenient assembly process. , The production efficiency is low, and the waterproof effect cannot be achieved.

Therefore, it is necessary to develop a charging gun and a stress relief structure to solve the problems faced by the prior art.

The purpose of this case is to provide a charging gun and its stress relief structure, which can achieve the effects of easy assembly of cables, saving man-hours in assembly, improving product production efficiency, stability, and waterproofing.

To achieve the above purpose, one of the broader implementation aspects of this case is to provide a charging gun, including a cable, a casing and a stress relief structure. Cables contain surfaces. The casing includes a first casing and a second casing. The first casing is detachably assembled with the second casing. The stress relief structure includes a first part and a second part. The first part is detachably assembled with the second part, the first part is arranged on the first inner wall of the first casing, and the second part is arranged on the second inner wall of the second casing. The first shell is assembled with the second shell, so that the first part and the second part are assembled, the first part is covered on the surface of at least part of the cable, and the second part is covered on the surface of at least part of the cable. on the surface, and the stress relief structure is sandwiched between the cable and the casing.

In order to achieve the above purpose, another broader implementation aspect of the present application is to provide a stress relief structure comprising a first part, a second part and a plurality of first annular convex parts. The second part is detachably assembled with the first part. A plurality of first annular protrusions are arranged on the first part and the second part. The first part and the second part are assembled, so that the first part covers at least part of the surface of the cable, and the second part covers at least part of the surface of the cable, a plurality of first annular protrusions It can be detachably pressed against the surface of the cable.

Some typical embodiments embodying the features and advantages of the present case will be described in detail in the description of the latter paragraph. It should be understood that this case can have various changes in different aspects, all of which do not depart from the scope of this case, and the descriptions and diagrams therein are essentially for illustrative purposes rather than limiting the present case.

Please refer to Figures 1 to 5, wherein Figure 1 is a schematic structural diagram of a charging gun according to a preferred embodiment of the present invention, and Figure 2 is a schematic exploded schematic view of the structure of the housing and stress relief structure of the charging gun shown in Figure 1. Figure 3 is a schematic exploded view of the housing and stress relief structure of the charging gun shown in Figure 1 from another perspective, and Figure 4 is a cross-section of the housing and stress relief structure of the charging gun shown in Figure 1 Schematic diagram of the structure, FIG. 5 is a schematic cross-sectional structure diagram of the charging gun shown in FIG. 1 . The charging gun 100 of this embodiment includes a casing 1 , a stress relief structure 2 and a cable 3 . The cable 3 includes a surface 31 . The housing 1 includes a first casing 11 and a second casing 12 , wherein the first casing 11 is detachably assembled with the second casing 12 . The stress relief structure 2 includes a first portion 21 , a second portion 22 and a plurality of first annular protrusions 23 . The first part 21 is detachably assembled with the second part 22 , the first part 21 is disposed on the first inner wall 11 a of the first casing 11 , and the second part 22 is disposed on the second inner wall 12 a of the second casing 12 , a plurality of first annular protrusions 23 are arranged on the first part 21 and the second part 22 . The first part 21 and the second part 22 are assembled through the assembly of the first shell 11 and the second shell 12, and the first part 21 is covered on at least part of the surface 31 of the cable 3, and the second part 22 is also covered on at least part of the surface 31 of the cable 3, and the stress relief structure 2 is arranged around the cable 3, and the stress relief structure 2 is sandwiched between the cable 3 and the casing 1, and a plurality of first An annular protrusion 23 can be detachably pressed against the surface 31 of the cable 3 . When the cable 3 is bent under a force, the stress relief structure 2 generates a supporting force corresponding to the bending stress, so as to prevent the cable 3 from being excessively bent and broken. In addition, in this case, the first housing 11 and the first part 21 and the second housing 12 and the second part 22 are detachably assembled on the cable 3, and there is no need to apply lubricating oil and the shell to complete the assembly before assembly, so as to simplify the assembly. process and improve production efficiency.

In one embodiment, the cable 3 of the charging gun 100 is structured to transmit power, wherein the cable 3 includes a first end (not shown) and a second end (not shown). The first end and the second end are two opposite ends of the cable 3 respectively, wherein the first end is electrically connected to a power supply device (not shown), wherein the power supply device is, for example, but not limited to, a charging pile. The second end includes a connector (not shown), wherein the connector is configured to be electrically connected to an external device (not shown), such as but not limited to an electric vehicle. Wherein, when the connector is electrically connected with the external device, the power supply device outputs power and transmits the power to the external device through the cable 3 to charge the external device.

Please refer to FIGS. 2 to 3. In this embodiment, the first portion 21 and the second portion 22 of the stress relief structure 2 are each a sheet-like structure with a half annular cross-section. When the first portion 21 and the second portion 22 are joined together , to form a ring-shaped stress relief structure 2, but not limited thereto. In this embodiment, the first portion 21 of the stress relief structure 2 includes a first inner surface 21 a and a first outer surface 21 b , which are surfaces on two opposite sides of the first portion 21 respectively. The second portion 22 of the stress relief structure 2 includes a second inner surface 22 a and a second outer surface 22 b . The second inner surface 22 a and the second outer surface 22 b are surfaces on two opposite sides of the second portion 22 , respectively. The first outer surface 21b of the first part 21 of the stress relief structure 2 matches with the first inner wall 11a of the first shell 11 of the housing 1, and the second outer surface 22b of the second part 22 of the stress relief structure 2 matches with each other. The second inner walls 12a of the second shell 12 of the housing 1 are matched with each other. The first shell 11 and the second shell 12 of the shell 1 are assembled by an external force, so that the shell 1 exerts pressure on the stress relief structure 2 to be tightly joined to prevent water or liquid from flowing between the shell 1 and the stress relief structure 2. The void penetrates into the interior of the unit to improve waterproofing.

Please refer to FIGS. 2 to 4. In this embodiment, the first portion 21 of the stress relief structure 2 includes a plurality of first protrusions 23a, wherein each of the first protrusions 23a extends outward from the first inner surface 21a The protrusions form a semi-annular protrusion structure, and a plurality of first protrusions 23a are adjacent to each other and arranged at intervals. The second portion 22 of the stress relief structure 2 includes a plurality of second protrusions 23b, wherein each of the second protrusions 23b is a semi-annular protrusion structure formed by the outward protrusion of the second inner surface 22a, and a plurality of second protrusions 23b are formed. The convex portions 23b are adjacent to each other and are provided at intervals. When the first portion 21 and the second portion 22 of the stress relief structure 2 are assembled, the plurality of first protrusions 23 a are respectively connected to the corresponding second protrusions 23 b to form a plurality of first annular protrusions 23 . When the stress relief structure 2 covers the outer side of the cable 3 , the plurality of first annular protrusions 23 abut on the surface of the cable 3 respectively. Through the arrangement of the plurality of first annular protrusions 23, the cable 3 and the stress relief structure 2 are more closely connected, so as to prevent water or liquid from infiltrating the inside of the device through the gap between the cable 3 and the stress relief structure 2, and lift the cable 3. Waterproof effect.

Please refer to FIGS. 2 to 4. In this embodiment, the first outer surface 21b of the first portion 21 of the stress relief structure 2 has a plurality of first concave portions 24a, wherein the plurality of first concave portions 24a are formed by the A semi-annular groove structure formed by an inward depression of the outer surface 21b is adjacent to and spaced apart from each other. The second outer surface 22b of the second portion 22 of the stress relief structure 2 has a plurality of second concave portions 24b, wherein the plurality of second concave portions 24b are semi-annular groove structures formed by inwardly concave the second outer surface 22b, and adjacent to each other and spaced apart. When the first portion 21 and the second portion 22 of the stress relief structure 2 are engaged, the plurality of first concave portions 24 a are respectively engaged with the corresponding second concave portions 24 b to form a plurality of annular concave portions 24 .

Please refer to FIGS. 2 to 4. In this embodiment, the first inner wall 11a of the housing 1 of this embodiment has a plurality of third protrusions 13a, and each third protrusion 13a is formed by the first inner wall 13a. The wall 11a protrudes outwardly to form a semi-annular protruding structure, and a plurality of third protruding portions 13a are adjacent to each other and arranged at intervals. The second inner wall 12a of the housing 1 of the present embodiment has a plurality of fourth protrusions 13b, wherein each fourth protrusion 13b is a semi-annular protrusion structure formed by the outward protrusion of the second inner wall 12a, and the plurality of fourth protrusions 13b are formed. The fourth protrusions 13b are adjacent to each other and arranged at intervals. When the first shell 11 and the second shell 12 of the housing 1 are assembled, the first part 21 and the second part 22 of the stress relief structure 2 are also assembled, and the plurality of third protrusions 13a are respectively connected to the corresponding The fourth protrusions 13b are formed to form a plurality of second annular protrusions 13 .

Please refer to FIGS. 2 to 4. In this embodiment, the number of the plurality of second annular convex portions 13 of the housing 1 and the plurality of annular concave portions 24 of the stress relief structure 2 are the same, and the positions correspond to each other, so, Each of the second annular convex portions 13 is detachably disposed in the corresponding annular concave portion 24 . The plurality of second annular convex portions 13 of the casing 1 are disposed in the corresponding annular concave portions 24 of the stress relief structure 2 , so that the stress relief structure 2 and the casing 1 are matched and tightly joined to prevent water or liquid from passing through the casing 1 . The gap with the stress relief structure 2 penetrates into the interior of the device to improve the waterproof effect. The number and arrangement of the annular concave portion 24 and the second annular convex portion 13 of the charging gun 100 in this case are not limited to the above-mentioned embodiments, and can be arbitrarily changed according to the actual situation. In this embodiment, the stress relief structure 2 is made of a waterproof material, such as rubber, but not limited thereto.

Please refer to FIG. 1 , FIG. 4 and FIG. 5 , in this embodiment, the stress relief structure 2 is disposed adjacent to the end 10 of the casing 1 , and the casing 1 completely covers the stress relief structure 2 . In other words, the stress relief structure 2 is not exposed outside the opening of the end portion 10 of the housing 1 . The stress relief structure 2 is completely covered by the casing 1 to limit the deformation range of the stress relief structure 2 , thereby reducing the risk of the cable 3 being broken due to excessive bending.

Please refer to FIG. 2 and FIG. 3. In this embodiment, the housing 1 of the charging gun 100 further includes a plurality of locking elements 14, wherein the plurality of locking elements 14 are arranged to fix the first casing 11 and the second casing 14. The casing 12, but not limited thereto. Each locking element 14 further includes a first locking portion 14a and a second locking portion 14b. The first locking portion 14 a is disposed on the first casing 11 , and the second locking portion 14 b is disposed on the second casing 12 . When the first housing 11 and the second housing 12 are assembled, the first locking portion 14a and the second locking portion 14b of each locking element 14 are engaged with each other, so that the first housing 11 is fixed to the second housing 14 . The casing 12 is used to realize the assembly of the casing 1 and prevent the first casing 11 and the second casing 12 from being ejected by the pressure applied to the stress relief structure 2 . In the present embodiment, the first locking portion 14 a of the locking element 14 is disposed on the first inner wall 11 a of the first casing 11 , and the second locking portion 14 b is disposed on the second inner wall of the second casing 12 . 12a, and the first locking portion 14a and the second locking portion 14b fasten the first casing 11 and the second casing 12 by means of a snap, but not limited thereto. In some embodiments, the locking element 14 can also be fixed by means of magnetic attraction or tight fitting, which are not limited thereto.

Please refer to FIG. 1 to FIG. 5, the charging gun 100 in this embodiment is assembled to at least part of the cable 3 through a separate housing 1 and a separate stress relief structure 2, so as to simplify the assembly process and improve production Efficiency, waterproof and other effects. First, the first part 21 of the stress relief structure 2 is disposed in the first shell 11 of the casing 1 , wherein the first part 21 and the first shell 11 are both sheet-like structures with semi-circular cross-section, and the first part 21 has a first outer shell. The surface 21b is matched with the first inner wall 11a of the first shell 11, so that the first part 21 is closely attached to the first shell 11; the second part 22 of the stress relief structure 2 is disposed on the second shell 12 of the outer shell 1 Inside, the second part 22 and the second shell 12 are both sheet-like structures of semi-circular section, and the second outer surface 22b of the second part 22 and the second inner wall 12a of the second shell 12 are matched with each other, so that The second portion 22 is closely attached to the second casing 12 . Next, the first shell 11 and the first part 21 are assembled to the second shell 12 and the second part 22 correspondingly, and the first part 21 and the second part 22 are wrapped around the outside of the cable 3 . Finally, the first casing 11 and the second casing 12 are pressed together by external force, and the first casing 11 and the second casing 12 are fixed by a plurality of locking elements 14 . In this way, the stress relief structure 2 is sandwiched between the casing 1 and the cable 3, so that the stress relief structure 2 and the casing 1 are closely attached to achieve a waterproof effect, and the stress relief structure 2 and the cable 3 are also tightly connected. Fitted to achieve waterproof effect. By assembling the separate casing 1 and the separate stress relief structure 2 to the cable 3, the effects of simplifying the assembly process, improving production efficiency, and waterproofing are achieved.

To sum up, in this case, the first shell of the outer shell and the first part of the stress relief structure and the second shell of the outer shell and the second part of the stress relief structure can be detachably assembled on the cable, and there is no need to paint before assembling The lubricating oil and shell are assembled to simplify the assembly process and improve production efficiency. In addition, in this case, the stress relief structure is matched with the outer shell, and the outer shell exerts pressure on the stress relief structure, so that the outer shell and the stress relief structure are closely connected, so as to prevent water or liquid from infiltrating the inside of the device through the gap between the outer shell and the stress relief structure, so as to prevent Improve waterproof effect. Furthermore, in this case, through the arrangement of the first annular convex portion, the cable and the stress relief structure are more closely joined, so as to prevent water or liquid from infiltrating the inside of the device through the gap between the cable and the stress relief structure, and improve the waterproof effect.

This case can be modified by Shi Jiangsi, a person who is familiar with this technology, but all of them do not deviate from the protection of the scope of the patent application attached.

100: Charging gun 1: Shell 10: End 11: The first shell 11a: First inner wall 12: Second shell 12a: Second inner wall 13: Second annular protrusion 13a: Third convex part 13b: Fourth convex portion 14: Locking element 14a: The first locking part 14b: Second locking part 2: Stress relief structure 21: Part One 21a: First inner surface 21b: First outer surface 22: Part Two 22a: Second inner surface 22b: Second outer surface 23: The first annular protrusion 23a: First convex part 23b: Second convex part 24: Annular recess 24a: First recess 24b: Second recess 3: Cable 31: Surface

FIG. 1 is a schematic diagram of the structure of the charging gun according to the preferred embodiment of the present invention. FIG. 2 is a schematic exploded view of the housing and the stress relief structure of the charging gun shown in FIG. 1 . FIG. 3 is a schematic exploded view of the housing and the stress relief structure of the charging gun shown in FIG. 1 from another viewing angle. FIG. 4 is a schematic cross-sectional structural diagram of the housing and the stress relief structure of the charging gun shown in FIG. 1 . FIG. 5 is a schematic cross-sectional view of the charging gun shown in FIG. 1 .

100: Charging gun 1: Shell 10: End 2: Stress relief structure 3: Cable 31: Surface

Claims (13)

A charging gun, comprising: a cable including a surface; a casing including a first casing and a second casing, wherein the first casing is detachably assembled with the second casing; and a The stress relief structure includes a first part and a second part, wherein the first part is detachably assembled with the second part, the first part is arranged on a first inner wall of the first shell, the second part The part is arranged on a second inner wall of the second shell; wherein, the first shell is assembled with the second shell, so that the first part and the second part are assembled, and the first part includes Covering at least part of the surface of the cable, the second part covering at least part of the surface of the cable, and the stress relief structure is sandwiched between the cable and the housing. The charging gun of claim 1, wherein a first outer surface of the first part matches the first inner wall of the first housing, and a second outer surface of the second part matches the second housing The second inner walls of the body are matched with each other. The charging gun of claim 2, wherein the first outer surface of the first portion of the stress relief structure has a plurality of first recesses, and the second outer surface of the second portion of the stress relief structure has a plurality of first recesses A plurality of second concave portions, wherein when the first portion is engaged with the second portion, the plurality of first concave portions are each engaged to the corresponding second concave portion to form a plurality of annular concave portions. The charging gun of claim 3, wherein the first inner wall of the casing has a plurality of third protrusions, the second inner wall has a plurality of fourth protrusions, and when the first part of the stress relief structure is connected to the When the second parts are assembled, the plurality of third protrusions are respectively connected to the corresponding fourth protrusions to form a plurality of second annular protrusions, wherein the plurality of A second annular convex portion is detachably disposed in the corresponding annular concave portion. The charging gun of claim 1, a first inner surface of the first portion of the stress relief structure includes a plurality of first protrusions, a second inner surface of the second portion includes a plurality of second protrusions, When the first part is assembled with the second part, the plurality of first convex parts are respectively connected to the corresponding second convex parts to form the plurality of first annular convex parts, wherein the plurality of first convex parts are The annular protrusion is detachably abutted on the surface of the cable. The charging gun of claim 1, wherein the casing completely covers the stress relief structure. The charging gun of claim 1, wherein the stress relief structure is adjacent to an end of the housing. The charging gun of claim 1, wherein the housing further includes at least one locking element, the at least one locking element further includes a first locking portion and a second locking portion, and the first locking portion is provided with In the first casing, the second locking portion is disposed on the second casing, wherein when the first casing and the second casing are assembled, the first locking portion and the second locking portion The parts are engaged with each other, so that the first casing is fixed to the second casing. A stress relief structure is suitable for a charging gun, the charging gun includes a cable and a casing, the casing includes a first casing and a second casing, wherein the first casing is separable from the second casing The shells are assembled, and the stress relief structure includes: a first part arranged on a first inner wall of the first shell; a second part arranged on a second inner wall of the second shell, and can be detachably assembled with the first part; and a plurality of first annular convex parts are arranged on the first part and the second part; wherein, the first shell is assembled with the second shell, so that the The first part and the second part are assembled so that the first part covers at least part of a surface of the cable, and the second part covers at least part of the surface of the cable, Should A plurality of first annular protrusions are detachably abutted on the surface of the cable. The stress relief structure of claim 9, wherein a first outer surface of the first part matches the first inner wall of the first casing, and a second outer surface of the second part matches the second outer surface The second inner walls of the housing are matched with each other. The stress relief structure of claim 10, wherein the first outer surface of the first part has a plurality of first recesses, and the second outer surface of the second part has a plurality of second recesses, wherein when the When the first part is engaged with the second part, the plurality of first concave parts are respectively engaged with the corresponding second concave part to form a plurality of annular concave parts, wherein the plurality of annular concave parts are respectively constructed to accommodate a plurality of corresponding numbers of the housing. a second annular protrusion. The stress relief structure of claim 9, wherein a first inner surface of the first portion of the stress relief structure includes a plurality of first convex portions, and a second inner surface of the second portion includes a plurality of second convex portions part, wherein when the first part and the second part are assembled, the plurality of first convex parts are respectively connected to the corresponding second convex parts to form the plurality of first annular convex parts. According to the stress relief structure of claim 9, the stress relief structure is made of a waterproof material.

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