Charger shell structure for electric wheelchair

Abstract

The utility model discloses a charger housing structure used for an electric wheelchair, comprising a housing, the housing is composed of an upper housing and a lower housing, the upper housing is provided with an insertion column, the lower housing is provided with a tubular insertion slot matched with the insertion column, and the insertion column is in interference fit with the tubular insertion slot to realize connection of the upper housing and the lower housing. According to the charger shell designed in the utility model, through the installation mode that the insertion column of the upper shell is in interference fit with the tubular insertion groove of the lower shell, the screw assembling procedure is omitted, the cost is reduced, and meanwhile, a non-detachable structure is formed; unauthorized disassembly is prevented; the sealing groove and the sealing protrusion which are arranged around the edges of the upper shell and the lower shell are clamped in a non-wire-hole area, waterproof and dustproof sealing is achieved, and outdoor use is adapted.

Description

Technical Field

[0001] This utility model relates to the field of charger housing technology, and in particular to a charger housing structure for an electric wheelchair. Background Technology

[0002] In the field of electric wheelchair charger housings, traditional housings mostly use screw connections. This method not only requires screw holes to be set on the housing, affecting the overall integrity and appearance of the housing, increasing processing steps and costs, but also makes it easy to disassemble later, which can easily lead to unauthorized disassembly, causing problems such as product modification and damage to internal components.

[0003] Therefore, those skilled in the art have provided a charger housing structure for electric wheelchairs to solve the problems mentioned in the background art. Utility Model Content

[0004] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a charger housing structure for electric wheelchairs.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A charger housing structure for an electric wheelchair includes a housing, which is composed of an upper housing and a lower housing. The upper housing is provided with a post, and the lower housing is provided with a tubular slot adapted to the post. The post and the tubular slot are interference-fitted to connect the upper housing and the lower housing. The edge of the upper housing is provided with a sealing groove, and the edge of the lower housing is provided with a sealing protrusion adapted to the sealing groove.

[0007] Preferably, four insertion posts are provided, and they are respectively located at the four corners of the inner side of the upper housing. The tubular slots are provided in a one-to-one correspondence with the insertion posts.

[0008] Preferably, the sealing groove is a groove that surrounds the bottom edge of the upper housing, and the sealing protrusion is a protrusion that surrounds the top edge of the lower housing, and the sealing protrusion is adapted to engage with the sealing groove.

[0009] Preferably, the outer wall of the insertion post is provided with anti-slip texture, and the end of the insertion post is provided with a guide chamfer.

[0010] Preferably, the outer side of the insertion post is provided with reinforcing ribs connected to the upper housing, and the number of reinforcing ribs is at least two, which are evenly distributed along the circumference of the insertion post. The tubular slot is also provided with reinforcing ribs between it and the lower housing.

[0011] Preferably, the housing is made of PC material, the outer diameter of the insertion post is 4.4 mm, and the inner diameter of the tubular slot is 4.3 mm.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] The charger housing designed in this utility model uses an interference fit between the four corner posts of the upper housing and the tubular slot of the lower housing, eliminating the screw assembly process, reducing costs, and forming a non-removable structure to prevent unauthorized disassembly. The sealing grooves and sealing protrusions around the edges of the upper and lower housings engage in non-wire hole areas to achieve waterproof and dustproof sealing, making it suitable for outdoor use. Attached Figure Description

[0014] To illustrate the technical solutions in the embodiments of the present invention or the prior art more specifically and intuitively, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0015] Figure 1 This is a schematic diagram of the shell structure proposed in this utility model;

[0016] Figure 2 This is a schematic diagram of the upper shell structure proposed in this utility model;

[0017] Figure 3 This is a schematic diagram of the lower shell structure proposed in this utility model.

[0018] In the diagram: 1. Housing; 101. Upper housing; 102. Lower housing; 2. Tubular slot; 3. Insert post; 4. Reinforcing rib; 5. Sealing groove; 6. Sealing protrusion; 7. Wire exit hole; 8. Indicator light mounting hole. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0020] Reference Figure 1-3 A charger housing structure for an electric wheelchair includes a housing 1, which is composed of an upper housing 101 and a lower housing 102. The upper housing 101 is provided with a plug 3, and the lower housing 102 is provided with a tubular slot 2 adapted to the plug 3. The plug 3 and the tubular slot 2 are interference-fitted to realize the connection between the upper housing and the lower housing. The edge of the upper housing is provided with a sealing groove 5, and the edge of the lower housing is provided with a sealing protrusion 6 adapted to the sealing groove 5.

[0021] The insertion post 3 and the tubular slot 2 are connected without screws through an interference fit, eliminating the screw assembly process and reducing processing costs. At the same time, the clamping force of the interference fit forms a non-removable structure, preventing the risk of modification due to unauthorized disassembly and damage to the internal components of the charger caused by unauthorized disassembly. The cooperation between the sealing groove and the sealing protrusion achieves waterproof and dustproof sealing of the edge of the shell 1, improving the safety of the charger in outdoor or humid environments.

[0022] There are four insertion posts 3, which are respectively located at the four corners of the inner side of the upper housing 101, and the tubular slots 2 are respectively set to correspond to the insertion posts one by one;

[0023] The stability of the shell connection is improved by the symmetrically distributed four-point positioning structure, so that the clamping force of the interference fit is evenly distributed and the overall structural strength is enhanced.

[0024] In addition, the top of the housing 1 is provided with an indicator light mounting hole 8, and wire exit holes 7 are provided at both ends. The indicator light mounting hole 8 is convenient for embedding the charging status indicator light, so as to facilitate the observation of the charging process. The wire exit holes 7 at both ends provide a through channel for the power cord and charging cable.

[0025] The sealing groove 5 is a groove that surrounds the bottom edge of the upper housing 101, and the sealing protrusion 6 is a protrusion that surrounds the top edge of the lower housing 102, and the sealing protrusion 6 is adapted to engage with the sealing groove 5.

[0026] The sealing groove 5 and the sealing protrusion 6 are matched and engaged. Although they are disconnected at the wire exit hole 7, they can still form a continuous sealing boundary in the non-disconnected area, effectively preventing liquid and dust from entering from the edge of the housing 1. At the same time, they meet the requirements for wire exit and avoid structural interference.

[0027] The outer wall of the insertion post 3 is provided with anti-slip texture, and the end of the insertion post 3 is provided with a guide chamfer;

[0028] The anti-slip texture on the outer wall of the insert 3 increases the friction with the inner wall of the tubular slot 2, preventing loosening due to vibration after interference fit; the guide chamfer at the end of the insert 3 reduces the insertion resistance during assembly and improves assembly efficiency.

[0029] The outer side of the insert post 3 is provided with reinforcing ribs 4 connected to the upper housing 101. There are at least two reinforcing ribs 4, which are evenly distributed around the circumference of the insert post 3. The tubular slot 2 and the lower housing 102 are also provided with reinforcing ribs 4.

[0030] The reinforcing ribs 4 on the outside of the insert 3 and the tubular slot 2 enhance the structural rigidity of the weak parts and prevent the insert 3 from breaking or the slot 2 from deforming due to stress concentration during interference fit.

[0031] The housing 1 is made of PC material, the outer diameter of the insertion post 3 is 4.4mm, and the inner diameter of the tubular slot 2 is 4.3mm;

[0032] The housing 1 is made of PC material, which has good strength, insulation and toughness, and meets the safety protection requirements of the charger housing. The size design of the plug 3 with an outer diameter of 4.4mm and the tubular slot 2 with an inner diameter of 4.3mm forms an interference of 0.1mm. According to the calculation, this parameter can ensure sufficient clamping force to achieve non-disassembly, while avoiding excessive interference that would cause assembly difficulties, and accurately balances the connection strength and process feasibility.

[0033] Working principle:

[0034] The screwless fastening assembly is achieved by the 0.1mm interference fit between the four corner posts 3 of the upper housing 101 and the corresponding tubular slots 2 of the lower housing 102. The clamping force generated by the interference fit forms a non-removable structure. The surrounding sealing grooves 5 and sealing protrusions 6 on the edges of the upper and lower housings engage in the non-wire hole area to achieve waterproof and dustproof sealing. The anti-slip texture and guide chamfer on the outer wall of the post 3 help to improve the stability and efficiency of the assembly.

[0035] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A charger housing structure for an electric wheelchair, comprising a housing (1), characterized in that, The housing (1) is composed of an upper housing (101) and a lower housing (102). The upper housing (101) is provided with a post (3), and the lower housing (102) is provided with a tubular slot (2) adapted to the post (3). The post (3) and the tubular slot (2) are interference-fitted to realize the connection between the upper housing (101) and the lower housing (102). The edge of the upper housing is provided with a sealing groove (5), and the edge of the lower housing is provided with a sealing protrusion (6) adapted to the sealing groove (5).

2. The charger housing structure for an electric wheelchair according to claim 1, characterized in that, There are four insertion posts (3), which are respectively located at the four corners of the inner side of the upper housing (101). The tubular slots (2) are arranged one-to-one with the insertion posts.

3. The charger housing structure for an electric wheelchair according to claim 1, characterized in that, The sealing groove (5) is a groove that surrounds the bottom edge of the upper housing (101), and the sealing protrusion (6) is a protrusion that surrounds the top edge of the lower housing (102), and the sealing protrusion (6) is adapted to engage with the sealing groove (5).

4. The charger housing structure for an electric wheelchair according to claim 1, characterized in that, The outer wall of the insert (3) is provided with anti-slip texture, and the end of the insert (3) is provided with a guide chamfer.

5. The charger housing structure for an electric wheelchair according to claim 4, characterized in that, The insert (3) is provided with a reinforcing rib (4) connected to the upper shell (101) on the outside. There are at least two reinforcing ribs (4) and they are evenly distributed around the insert (3). The tubular slot (2) is also provided with a reinforcing rib (4) between it and the lower shell (102).

6. The charger housing structure for an electric wheelchair according to claim 1, characterized in that, The housing (1) is made of PC material, the outer diameter of the insert (3) is 4.4 mm, and the inner diameter of the tubular slot (2) is 4.3 mm.

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