Shockproof electrical equipment

Abstract

The shockproof electrical equipment comprises an upper shell, a circuit board and a lower shell which are arranged from top to bottom, supporting edges are fixed to the four corners of the inner wall of the top of the upper shell, a plurality of supporting columns are fixed to the other positions, except for the four corners, of the inner wall of the top of the upper shell at intervals, and the bottoms of each supporting column and the corresponding supporting edge are located on the same horizontal plane. Supporting and positioning protrusions with the upper portions narrow and the lower portions wide are fixed to the tops of the left side face and the right side face of the lower shell, long-strip-shaped holes are formed in the positions, located under the supporting and positioning protrusions, of the left side face and the right side face of the lower shell, and elastic arms are formed between the long-strip-shaped holes and the supporting and positioning protrusions over the long-strip-shaped holes. Positioning grooves matched with the supporting and positioning bulges on the corresponding sides are formed in the left side surface and the right side surface of the circuit board respectively; each positioning groove is clamped on the corresponding supporting positioning protrusion to fix the circuit board and the lower shell, the upper shell and the lower shell are fixed in a matched mode, and under the action of the supporting columns, the supporting edges and the elastic arms, the matching positions of the positioning grooves and the supporting positioning protrusions are close to the large-size end of the bottom and are in zero-clearance fit.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical equipment, in particular to a shockproof electrical equipment. Background Art

[0002] The circuit board of electrical equipment needs to be reliably fixed. Otherwise, when working in a vibrating environment, unreliable fixation will cause the circuit board to vibrate and hit the inner wall of the shell, which may easily cause the components on the circuit board to fall off and be damaged, resulting in equipment failure and loss. In general, the circuit board is fixed by screws, but screw fixation will increase the installation process and the type of materials, thereby increasing the cost, and screw fixation will occupy the space of the circuit board and affect the layout and routing of the circuit board. Since screws are usually metal parts, it is difficult to find a suitable screw position in circuits that require isolation or require a large electrical gap. There is also a method of using a structure to fix the circuit board, which is easy to install, but due to the dimensional tolerance between batches of circuit boards, plus some protective spraying processes, such as brushing three-proof paint, the dimensional tolerance will become larger. When designing the structural fixation, it is necessary to design according to the maximum size of the circuit board, which will result in a larger assembly gap after the installation of a circuit board that is smaller than the tolerance range. At this time, shaking or vibrating the equipment will cause the circuit board to collide with the inner wall of the shell, which may easily cause the components on the circuit board to fall off and be damaged, resulting in equipment failure and loss. Utility Model Content

[0003] The utility model aims at solving the problems and shortcomings of the prior art and provides a novel shockproof electrical device.

[0004] The utility model solves the above technical problems through the following technical solutions:

[0005] The utility model provides a shockproof electrical device, which is characterized in that it comprises an upper shell, a circuit board and a lower shell which are arranged in sequence from top to bottom, support edges are fixed at the four corner positions of the top inner wall of the upper shell respectively, a plurality of support columns are fixed at intervals at other positions of the top inner wall of the upper shell except the four corner positions, the bottom of each of the support columns and the support edge is on the same horizontal plane, at least one support positioning protrusion which is narrow at the top and wide at the bottom is fixed at the top of the left and right side surfaces of the lower shell, long strip holes are provided on the left and right side surfaces of the lower shell and directly below each support positioning protrusion, an elastic arm is formed between each of the long strip holes and the support positioning protrusion directly above it, and positioning grooves which match the corresponding side support positioning protrusions are provided on the left and right side surfaces of the circuit board respectively, and the size of the positioning grooves is between the small size end at the top and the large size end at the bottom of the support positioning protrusion.

[0006] Each of the positioning grooves is clamped on the corresponding matching support positioning protrusion so that the circuit board and the lower shell are fixed, and the upper shell and the lower shell are fixed together. Under the action of the support column, the support edge and the elastic arm, the positioning groove and the support positioning protrusion are matched at a position close to the large-size end of the bottom and are zero-gap matched. The circuit board is completely fixed with zero gap in the up and down directions.

[0007] The positive and progressive effects of the utility model are:

[0008] The utility model discloses a shockproof electrical device, wherein a circuit board is installed between an upper and lower shell, the lower shell is provided with an elastic arm with a support positioning protrusion, a positioning groove is provided on the circuit board and matches with the support positioning protrusion, the size of the positioning groove is between the small size end and the large size end of the support positioning protrusion, so that the matching position of the positioning groove on the circuit board and the support positioning protrusion is near the middle of the support positioning protrusion and is zero-clearance matching, after the upper shell and the lower shell are matched and fixed, the upper shell support applies a downward force to the circuit board, and the elastic arm connected to the support positioning protrusion is deformed accordingly and applies an upward force, so that the matching position of the positioning groove and the support positioning protrusion is near the middle of the support positioning protrusion. The circuit board is fixed with zero clearance in the up and down directions because the support positioning protrusion and the positioning groove on the circuit board are matched with zero clearance, so the circuit board is completely fixed in the front, back, left and right directions. At this time, the circuit board is in a state of zero clearance and completely fixed. When the equipment is shaken and vibrated, the circuit board will not hit the inner wall of the shell, thereby achieving the shockproof effect of the circuit board. This shockproof electrical equipment can achieve the shockproof effect of the circuit board without the assistance of additional parts. The equipment is simple to install and has high assembly efficiency, which improves production efficiency and reduces production cost and material cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 is a schematic diagram of the equipment of this embodiment;

[0010] Figure 2 is a schematic diagram of the structure of the upper shell;

[0011] Figure 3 is a schematic diagram of the structure of the lower shell;

[0012] Figure 4 It is a schematic diagram of the structure of the circuit board;

[0013] Figure 5 (a)-(b) is a schematic diagram of the assembly process of this embodiment;

[0014] Figures 6(a)-(k) are schematic diagrams of the anti-vibration principle of the circuit board of this embodiment, wherein Figure 6(b) is an enlarged view of area A in Figure 6(a), Figure 6(d) is an enlarged view of area B in Figure 6(c), Figure 6(i) is a DD cross-sectional view in Figure 6(a), and Figure 6(j) is an enlarged view of area C in Figure 6(i). DETAILED DESCRIPTION

[0015] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0016] like Figure 1 As shown, this embodiment provides a shockproof electrical device, which includes an upper shell 1, a circuit board 3 and a lower shell 2 arranged in sequence from top to bottom.

[0017] like Figure 2 As shown, buckle grooves 1a are respectively provided at the front and rear ends of the left and right sides of the upper shell 1, and support columns 1b are respectively fixed to the top inner wall of the upper shell 1 at the middle position of the left side, the middle position of the right side, the middle position of the front side and the middle position of the rear side, and support edges 1c are respectively fixed at the four corner positions of the top inner wall of the upper shell 1, and the bottom of each support column 1b and the support edge 1c are on the same horizontal plane.

[0018] like Figure 3 As shown, buckles 2a matching the buckle grooves 1a are respectively provided at the front and rear ends of the left and right sides of the lower shell 2, and two narrow upper and wide lower truncated cone-shaped supporting positioning protrusions 2b are fixed at the top of the left and right sides of the lower shell 2 and between the buckles 2a on the corresponding sides. The two truncated cone-shaped supporting positioning protrusions 2b are respectively located on both sides of the corresponding side supporting columns 1b, and long strip holes are provided on the left and right sides of the lower shell 2 and directly below each truncated cone-shaped supporting positioning protrusion 2b. Adjacent long strip holes are not connected, and an elastic arm 2c is formed between each long strip hole and the truncated cone-shaped supporting positioning protrusion 2b directly above it.

[0019] like Figure 4 As shown, the left and right sides of the circuit board are respectively provided with positioning grooves 3a matching the corresponding side truncated cone-shaped support positioning protrusions 2b, and the size of the positioning grooves 3a is between the top small-sized end and the bottom large-sized end of the truncated cone-shaped support positioning protrusion 2b.

[0020] Figure 5 (a)-(b) is a schematic diagram of the assembly process of this embodiment. According to the direction of Figure 5 (a), the circuit board 3, the upper shell 1 and the lower shell 2 are installed and fixed in sequence. Each positioning groove 3a is clamped on the corresponding matching truncated cone-shaped support positioning protrusion 2b to fix the circuit board 3 and the lower shell 2. Each buckle groove 1a is buckled on the corresponding matching buckle 2a to fix the upper shell 1 and the lower shell 2. The assembly completion state is shown in Figure 5 (b), and the assembly efficiency is high.

[0021] 6(a)-(c) are schematic diagrams of the anti-vibration principle of the circuit board of this embodiment. Figure 6(a)-6(b) As shown, the size of the positioning groove 3a of the circuit board 3 is between the small size end and the large size end of the truncated cone-shaped supporting positioning protrusion 2b; Figure 6(c)-6(d) As shown, the positioning groove 3a on the circuit board 3 in the front-to-back direction cooperates with the truncated cone-shaped support positioning protrusion 2b at a position where the truncated cone-shaped support positioning protrusion is away from the large-size end g and is zero-clearance fit, as shown in FIG. Figure 6(e)-6(g) As shown in FIG. 6 , after the upper shell 1 and the lower shell 2 are fixed together, the support column 1b and the support edge 1c of the upper shell 1 apply a downward force b to the circuit board 3, and the elastic arm 2c of the lower shell 2 is deformed and applies an upward force a, so that the circuit board 3 is fixed with zero clearance in the vertical direction, and the circuit board 3 is completely fixed in the vertical direction; as shown in FIG. 6 (h), since the truncated cone-shaped support positioning protrusion 2b in the front-to-back direction and the positioning groove 3a on the circuit board 3 are zero-clearance fit, the circuit board is completely fixed in the front-to-back directions c and d; Figure 6(i)-6(j) As shown, the positioning groove 3a on the circuit board 3 in the left-right direction cooperates with the truncated cone-shaped support positioning protrusion 2b at a position where the truncated cone-shaped support positioning protrusion is away from the large-size end g and is a zero-clearance fit. As shown in FIG6(k), since the truncated cone-shaped support positioning protrusion 2b in the left-right direction cooperates with the positioning groove 3a on the circuit board 3 in the left-right direction, the circuit board is completely fixed in the left-right directions e and f. At this time, the circuit board 3 is in a zero-clearance and completely fixed state. When the equipment is shaken and vibrated, the circuit board will not hit the inner wall of the casing, thereby achieving a shockproof effect for the circuit board.

[0022] This type of shockproof electrical equipment can achieve the shockproof effect of the circuit board without the assistance of additional parts. The equipment is easy to install and has high assembly efficiency, which improves production efficiency and reduces production costs and material costs.

[0023] Although the specific embodiments of the present invention are described above, those skilled in the art should understand that these are only examples, and the protection scope of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principle and essence of the present invention, but these changes and modifications fall within the protection scope of the present invention.

Claims

1. A shockproof electrical device, characterized in that: It comprises an upper shell, a circuit board and a lower shell which are arranged in sequence from top to bottom, support edges are fixed at the four corner positions of the top inner wall of the upper shell respectively, a plurality of support columns are fixed at intervals at other positions of the top inner wall of the upper shell except the four corner positions, the bottom of each of the support columns and the support edge is on the same horizontal plane, at least one support positioning protrusion which is narrow at the top and wide at the bottom is fixed at the top of the left and right side surfaces of the lower shell, long strip holes are provided on the left and right side surfaces of the lower shell and directly below each support positioning protrusion, an elastic arm is formed between each of the long strip holes and the support positioning protrusion directly above it, and positioning grooves which match the corresponding side support positioning protrusions are provided on the left and right side surfaces of the circuit board respectively, and the size of the positioning grooves is between the small size end at the top and the large size end at the bottom of the support positioning protrusion; Each of the positioning grooves is clamped on the corresponding matching support positioning protrusion so that the circuit board and the lower shell are fixed, and the upper shell and the lower shell are fixed together. Under the action of the support column, the support edge and the elastic arm, the positioning groove and the support positioning protrusion are matched at a position close to the large-size end of the bottom and are zero-gap matched. The circuit board is completely fixed with zero gap in the up and down directions.

2. The shockproof electrical device according to claim 1, characterized in that: The front and rear ends of the left and right sides of the upper shell are respectively provided with buckle grooves, and the front and rear ends of the left and right sides of the lower shell are respectively provided with buckles matching the buckle grooves. Each buckle groove is buckled on the corresponding matching buckle to fix the upper shell and the lower shell.

3. The shockproof electrical device according to claim 2, characterized in that: Two supporting and positioning protrusions which are narrow at the top and wide at the bottom are fixed on the tops of the left and right side surfaces of the lower shell and located between the buckles on the corresponding sides.

4. The shockproof electrical device according to claim 3, characterized in that: Support columns are fixed on the top inner wall of the upper shell at the middle position of the left side, the middle position of the right side, the middle position of the front side and the middle position of the rear side respectively.

5. The shockproof electrical device according to claim 4, characterized in that: The two support positioning protrusions are respectively located on both sides of the corresponding side support column.

6. The shockproof electrical device according to claim 1, characterized in that: Each of the support and positioning protrusions is a truncated cone-shaped support and positioning protrusion.

7. The shockproof electrical device according to claim 1, characterized in that: Adjacent elongated holes are not connected.

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