Guide rail meter

Abstract

The utility model belongs to the technical field of instruments and meters, and particularly discloses a guide rail meter. According to the guide rail meter provided by the utility model, the clamping piece and the limiting piece are matched to fix the PCB on the base, the clamping piece is arranged at the edge of the opening of the accommodating cavity, the clamping piece is connected with the base, and a hole is not required to be formed in the side wall of the base for arranging the clamping piece, so that the structure of a mold for injection molding of the base is simplified, and the cost of designing the mold is reduced; as the structure that the clamping piece is connected with the base is simple, mold stripping is easy in the injection molding process, and the yield of products is improved; the PCB can be installed between the clamping piece and the limiting piece from top to bottom, when the PCB is installed, based on the position of the clamping piece arranged on the base, the clamping piece is broken off by hand to enable the clamping piece to deform, other tools are not needed to be used for installing the PCB, and the assembling difficulty of the PCB is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of instruments and meters, in particular to a rail meter. Background Art

[0002] The rail meter can be widely applied to fields such as power system substations, electrical engineering of intelligent buildings, energy efficiency management systems, and switch cabinets of factory power systems, and is suitable for functions such as low-voltage measurement and control, operation, etc.

[0003] A PCB board is usually provided inside the rail meter, and the PCB board is connected to the base of the rail meter through a clamping structure. In the prior art, a hollow hole is provided on the side wall of the base, and a buckle is provided at the hollow hole. The buckle is elastically connected to the hole wall of the hollow hole, and the buckle elastically deforms to realize clamping of the PCB board. Usually, the base, the hollow hole, and the buckle are an integrally formed structure, and the hollow hole and the buckle are processed while injecting the base. However, the structure of the buckle causes the mold structure of the injected base to be complex, and the cost of designing the mold is increased. Since the connection structure between the buckle and the base is relatively complex, it is not easy to demold during the injection process, which increases the rejection rate of the product. During the process of assembling the PCB board, tools are also required to be inserted into the hollow hole to deform the buckle in order to install the PCB board, and the assembly process is relatively cumbersome. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a rail meter, the clamping structure is simply arranged, the production cost is reduced, the yield is improved, and the difficulty of assembling the PCB board is also reduced.

[0005] To achieve the above object, the utility model adopts the following technical solutions:

[0006] In a first aspect, a rail meter is provided, including:

[0007] A base having a receiving cavity, a clamping member is provided at the opening edge of the receiving cavity, the clamping member is elastically connected to the base, and a limiting member is provided on the inner side of the cavity wall of the receiving cavity;

[0008] A PCB board is placed between the clamping member and the limiting member, and the clamping member presses the PCB board against the limiting member.

[0009] As an optional technical solution of the above rail meter, each PCB board corresponds to at least two clamping members, and at least two clamping members are correspondingly arranged with two diagonally arranged corners of the PCB board.

[0010] As an optional technical solution of the above rail meter, the clamping member includes a buckle plate, one end of the buckle plate is elastically connected to the base, and a clamping block protrudes from the side surface of the other end of the buckle plate, and the clamping block faces the receiving cavity.

[0011] As an alternative technical solution of the above-mentioned guide rail table, a guiding inclined surface is provided on one side of the clamping block facing away from the PCB board.

[0012] As an alternative technical solution of the above-mentioned guide rail table, the limiting member includes a limiting boss protruding from the inner wall of the accommodating cavity, and the PCB board abuts against the limiting boss.

[0013] As an alternative technical solution of the above-mentioned guide rail table, the PCB board includes a bottom-layer PCB board, and the clamping member and the limiting member place the bottom-layer PCB board in the accommodating cavity.

[0014] As an alternative technical solution of the above-mentioned guide rail table, connecting plates are respectively protruded from two edges of the opening of the accommodating cavity opposite to each other, the clamping member is arranged at one end of the connecting plate facing away from the base, and the limiting member is arranged on the inner side surface of the connecting plate.

[0015] As an alternative technical solution of the above-mentioned guide rail table, the PCB board further includes a middle-layer PCB board, a clamping groove is recessed at one end of the connecting plate facing away from the base, a clamping portion is protruded from the edge of the middle-layer PCB board, and the clamping portion is inserted into the clamping groove.

[0016] As an alternative technical solution of the above-mentioned guide rail table, a supporting member is arranged on the inner side surface of the connecting plate, the supporting member is correspondingly arranged with the clamping member arranged on the connecting plate, and the middle-layer PCB board is limited between the supporting member and the clamping member arranged on the connecting plate.

[0017] As an alternative technical solution of the above-mentioned guide rail table, the supporting member includes a supporting boss, the supporting boss is integrally formed with the inner side surface of the connecting plate, a supporting surface is arranged at one end of the supporting boss close to the clamping member arranged on the connecting plate, and the middle-layer PCB board is limited between the supporting surface and the clamping member arranged on the connecting plate.

[0018] The beneficial effects of the present utility model:

[0019] The guide rail meter provided by the present utility model fixes the PCB board on the base through the cooperation of the clamping member and the limiting member. The present utility model sets the clamping member at the opening edge of the accommodating cavity, and the clamping member is connected to the base, without opening holes on the side wall of the base to set the clamping member, which simplifies the mold structure of the injection-molded base and reduces the cost of designing the mold; due to the simple structure of the connection between the clamping member and the base, it is easy to demold during the injection molding process, improving the product qualification rate; the PCB board can be installed between the clamping member and the limiting member from top to bottom. When installing the PCB board, based on the position of the clamping member set on the base, the clamping member can be deformed by hand, and there is no need to use other tools to install the PCB board, reducing the difficulty of PCB board assembly. Description of the Drawings

[0020] Figure 1 is a schematic diagram of the internal structure of the guide rail meter provided by an embodiment of the present utility model;

[0021] Figure 2 is an exploded view of the internal structure of the guide rail meter provided by an embodiment of the present utility model;

[0022] Figure 3 is a schematic diagram of the structure of the base provided by an embodiment of the present utility model;

[0023] Figure 4 is a schematic diagram of the connection structure between the bottom layer PCB board and the base provided by the present utility model;

[0024] Figure 5 is a cross-sectional view of the internal structure of the guide rail meter provided by an embodiment of the present utility model.

[0025] In the figure:

[0026] 1, base; 2, clamping member; 3, limiting member; 4, PCB board; 5, support member;

[0027] 11, accommodating cavity; 12, connecting plate; 13, clamping groove;

[0028] 21, buckle plate; 22, clamping block;

[0029] 31, limiting boss;

[0030] 41, bottom layer PCB board; 42, middle layer PCB board; 421, clamping part;

[0031] 51, support boss; 511, support surface;

[0032] 100, wiring terminal assembly; 200, current transformer assembly. Detailed Embodiment

[0033] The present utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present utility model, rather than limiting the present utility model. In addition, it should be noted that for the sake of description, only parts related to the present utility model are shown in the drawings, rather than all structures.

[0034] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0035] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features between them. Moreover, the first feature being "above", "above the upper part", and "on the upper surface" of the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "below the lower part", and "on the lower surface" of the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0036] In the description of this embodiment, the orientation or positional relationships such as "upper", "lower", "right", etc. are based on the orientation or positional relationships shown in the drawings. It is only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0037] As Figure 1 and Figure 2 shown, this embodiment provides a rail meter, which includes a base 1. A terminal block assembly 100 is provided on the base 1, and the terminal block assembly 100 is used to connect external wires. A current transformer assembly 200 is provided inside the base 1. The rail meter further includes a PCB board 4. The number of PCB boards 4 can be 1, 2, 3, or more, and no specific limitation is made here.

[0038] In the prior art, the installation structure of the PCB board is relatively complex, it is not easy to demold during the process of injecting the plastic base, which increases the rejection rate of the product, and the assembly of the PCB board is rather cumbersome. Based on the existing problems, this embodiment proposes an installation structure of the PCB board inside the guide rail table to simplify the clamping structure for fixing the PCB board 4, reduce the production cost, improve the yield rate, and also reduce the difficulty of assembling the PCB board 4.

[0039] As Figure 1 and Figure 3 shown, the base 1 has a receiving cavity 11. A clamping member 2 is provided at the opening edge of the receiving cavity 11. The clamping member 2 is elastically connected to the base 1. A limiting member 3 is provided on the inner side of the cavity wall of the receiving cavity 11. The PCB board 4 is disposed on the base 1, and the PCB board 4 is placed between the clamping member 2 and the limiting member 3. The clamping member 2 presses the PCB board 4 against the limiting member 3. The clamping member 2 and the limiting member 3 cooperate to fix the PCB board 4 on the base 1. In this embodiment, the clamping member 2 is provided at the opening edge of the receiving cavity 11. The clamping member 2 is connected to the base 1, and there is no need to open holes on the side wall of the base 1 to provide the clamping member 2, which simplifies the mold structure of the injection-molded base 1 and reduces the cost of designing the mold; since the structure of the clamping member 2 connected to the base 1 is simple, it is easy to demold during the injection process, improving the yield rate of the product; the PCB board 4 can be installed from top to bottom between the clamping member 2 and the limiting member 3. When installing the PCB board 4, based on the position of the clamping member 2 provided on the base 1, simply bend the clamping member 2 by hand to deform it, and there is no need to use other tools to install the PCB board 4, reducing the difficulty of assembling the PCB board 4.

[0040] In some embodiments, each PCB board 4 corresponds to at least two clamping members 2. At least two clamping members 2 are arranged corresponding to two diagonally arranged corners of the PCB board 4 to stably fix the PCB board 4 with a simple clamping structure, and also simplify the mold of the injection-molded base 1, reduce the production cost, and improve the yield rate. In some other embodiments, each PCB board 4 can also correspond to three or four clamping members 2, and the clamping members 2 are clamped at the corners of the PCB board 4.

[0041] Optionally, the clamping member 2 includes a snap plate 21. One end of the snap plate 21 is elastically connected to the base 1. A snap block 22 protrudes from the side surface of the other end of the snap plate 21. The snap block 22 faces the receiving cavity 11. The snap block 22 and the limiting member 3 cooperate to fix the PCB board 4. By bending the snap plate 21 by hand, it can provide a clearance space for the installation of the PCB board 4. After the external force on the snap plate 21 is removed, the snap plate 21 resets, and the snap block 22 abuts against the PCB board 4 to realize the limitation of the PCB board 4.

[0042] Further, a guiding inclined surface is provided on the side of the clamping block 22 facing away from the PCB board 4. The PCB board 4 can be installed from top to bottom. During the process of moving the PCB board 4 downward, the PCB board 4 acts on the guiding inclined surface, which can cause a certain deformation of the clamping plate 21, facilitating the downward movement of the PCB board 4 between the clamping block 22 and the limiting member 3. Even during the installation of the PCB board 4, there is no need to manually bend the clamping plate 21.

[0043] The clamping member 2 and the base 1 are of an integrally formed structure, and the clamping member 2 is formed while injecting the base 1.

[0044] In some embodiments, the limiting member 3 includes a limiting boss 31 protruding from the cavity wall of the accommodating cavity 11, and the PCB board 4 abuts against the limiting boss 31. The structure of the limiting member 3 is simple and easy to process. At least one limiting boss 31 is respectively provided on at least two opposite cavity walls of the accommodating cavity 11, so as to effectively support both opposite ends of the PCB board 4, realizing the stable installation of the PCB board 4. Preferably, a limiting boss 31 is provided on the cavity wall of the accommodating cavity 11 corresponding to the clamping member 2 to improve the stability of fixing the PCB board 4.

[0045] The limiting boss 31 and the base 1 are of an integrally formed structure, and the limiting boss 31 is formed while injecting the base 1.

[0046] There are at least two PCB boards 4, one of which is defined as the bottom layer PCB board 41 and one is defined as the middle layer PCB board 42.

[0047] Refer to Figure 1 、 Figure 3 and Figure 4 As shown, the clamping member 2 and the limiting member 3 place the bottom layer PCB board 41 in the accommodating cavity 11, and the bottom layer PCB board 41 is installed on the base 1 by moving downward from top to bottom. The transformer component 200, the wiring terminal component 100, etc. are installed in the accommodating cavity 11 below the bottom layer PCB board 41. The setting structure of the clamping member 2 realizes the fixation of the bottom layer PCB board 41 in the accommodating cavity 11, preferably at the opening of the accommodating cavity 11, so that the bottom layer PCB board 41 does not occupy the space for installing the transformer component 200 and the wiring terminal component 100.

[0048] Refer to Figure 1 、 Figure 3 and Figure 5As shown in the figure, the middle-layer PCB board 42 is disposed higher than the bottom-layer PCB board 41. In order to fix the middle-layer PCB board 42, two edges opposite to the opening of the accommodation cavity 11 are respectively convexly provided with connecting plates 12. The clamping member 2 is disposed at one end of the connecting plate 12 away from the base 1, and the limiting member 3 is disposed on the inner side surface of the connecting plate 12, without occupying the space for installing the mutual inductor assembly 200 and the terminal block assembly 100. The connecting plate 12 and the base 1 are of an integrally formed structure, and the limiting member 3 and the clamping member 2 and the connecting plate 12 are of an integrally formed structure. The connecting plate 12 is formed while injecting the base 1, and the clamping member 2 and the limiting member 3 are formed on the connecting plate 12.

[0049] The limiting member 3 for limiting the bottom-layer PCB board 41 and the limiting member 3 for limiting the middle-layer PCB board 42 can be of an integrally connected structure. The above-mentioned limiting member 3 includes a limiting boss 31. Then, the limiting member 3 for limiting the bottom-layer PCB board 41 and the limiting member 3 for limiting the middle-layer PCB board 42 can form an integral structure with a stepped surface. The stepped surface placed at the lower layer is used to support the bottom-layer PCB board 41, and the stepped surface placed at the upper layer is used to support the middle-layer PCB board 42.

[0050] Further optionally, a clamping groove 13 is concavely provided at one end of the connecting plate 12 away from the base 1. A clamping portion 421 is convexly provided at the edge of the middle-layer PCB board 42. The clamping portion 421 is inserted into the clamping groove 13. The cooperation between the two provides support for the setting of the middle-layer PCB board 42 and limits the middle-layer PCB board 42 in the horizontal direction, avoiding the middle-layer PCB board 42 from shaking and improving the stability of the fixation of the middle-layer PCB board 42. And the clamping groove 13 is concavely provided at the end of the connecting plate 12, which can meet the requirement for the installation of the middle-layer PCB board 42 from top to bottom. When installing the middle-layer PCB board 42, the clamping portion 421 is clamped in the clamping groove 13.

[0051] Still further, a support member 5 is provided on the inner side surface of the connecting plate 12. The support member 5 is correspondingly provided with the clamping member 2 provided on the connecting plate 12. The middle-layer PCB board 42 is limited between the support member 5 and the clamping member 2 provided on the connecting plate 12. Optionally, the support member 5 includes a support boss 51. The support boss 51 is integrally formed with the inner side surface of the connecting plate 12. A support surface 511 is provided at one end of the support boss 51 close to the clamping member 2 provided on the connecting plate 12. The support surface 511 and the clamping member 2 provided on the connecting plate 12 are used to limit the middle-layer PCB board 42. The distance between the support surface 511 and the clamping member 2 matches the thickness of the middle-layer PCB board 42 to accommodate and support the middle-layer PCB board 42. The support member 5 can also be of an integrally formed structure with the limiting member 3 for supporting the bottom-layer PCB board 41 to form an integral structure with a stepped surface to realize the support for the bottom-layer PCB board 41 and the middle-layer PCB board 42. The support member 5 and the connecting plate 12 are of an integrally formed structure.

[0052] It should be noted that if the guide rail table has 3 PCBs 4, 4 PCBs 4 or more PCBs 4, the installation methods of the remaining PCBs 4 and the above-mentioned bottom-layer PCB 41 or middle-layer PCB 42 can be the same, and no specific limitations are made here.

[0053] Obviously, the above embodiments of the present invention are merely examples for clearly explaining the present invention, rather than limitations on the implementation manners of the present invention. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to enumerate all implementation manners here. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. Guide rail table, characterized in that, include: A base (1), the base (1) having a receiving cavity (11), a clamping piece (2) being provided at an opening edge of the receiving cavity (11), the clamping piece (2) being elastically connected to the base (1), and a limiting piece (3) being provided on the inner side of a cavity wall of the receiving cavity (11); The PCB board (4) is placed between the clamping member (2) and the limiting member (3), and the clamping member (2) causes the PCB board (4) to abut against the limiting member (3).

2. The guide rail table according to claim 1, characterized in that: Each of the PCB boards (4) corresponds to at least two of the clamping components (2), and the at least two of the clamping components (2) are arranged corresponding to two obliquely arranged corners of the PCB board (4).

3. The guide rail table according to claim 1, characterized in that: The clamping member (2) comprises a clamping plate (21), one end of which is elastically connected to the base (1), and a clamping block (22) is protruding from the side surface of the other end of the clamping plate (21), and the clamping block (22) faces the accommodating cavity (11).

4. The guide rail table according to claim 3, characterized in that: A guiding inclined surface is provided on the side of the clamping block (22) facing away from the PCB board (4).

5. The guide rail table according to claim 1, characterized in that: The limiting member (3) comprises a limiting boss (31) protruding from the cavity wall of the accommodating cavity (11), and the PCB board (4) abuts against the limiting boss (31).

6. The guide rail table according to any one of claims 1 to 5, characterized in that: The PCB board (4) comprises a bottom PCB board (41), and the clamping member (2) and the limiting member (3) enable the bottom PCB board (41) to be placed in the accommodating cavity (11).

7. The guide rail table according to any one of claims 1 to 5, characterized in that: Connecting plates (12) are respectively protruded from two opposite edges of the opening of the accommodating cavity (11); the clamping member (2) is arranged at one end of the connecting plate (12) away from the base (1); and the limiting member (3) is arranged on the inner side surface of the connecting plate (12).

8. The guide rail table according to claim 7, characterized in that: The PCB board (4) further comprises a middle PCB board (42); an end of the connecting plate (12) facing away from the base (1) is provided with a recessed snap-in groove (13); an edge of the middle PCB board (42) is provided with a protruding snap-in portion (421); and the snap-in portion (421) is inserted into the snap-in groove (13).

9. The guide rail table according to claim 8, characterized in that: A support member (5) is provided on the inner side surface of the connecting plate (12), the support member (5) being arranged corresponding to the clamping member (2) arranged on the connecting plate (12), and the middle layer PCB board (42) being limited between the support member (5) and the clamping member (2) arranged on the connecting plate (12).

10. The guide rail table according to claim 9, characterized in that: The support member (5) comprises a support boss (51), the support boss (51) and the inner side surface of the connecting plate (12) being integrally formed, and a support surface (511) is provided at one end of the support boss (51) close to the clamping member (2) arranged on the connecting plate (12), and the support surface (511) and the clamping member (2) arranged on the connecting plate (12) are used to limit the middle layer PCB board (42).

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