Normally-closed high-voltage interlocking structure

Abstract

The utility model discloses a normally-closed high-voltage interlocking structure, which comprises a shell, and a contact block, an elastic piece and a loop terminal assembly which are sequentially arranged in the shell, the loop terminal assembly comprises a terminal base arranged in the shell and a pair of male pins arranged on the terminal base, the end part of each male pin is provided with a joint structure, the contact block is provided with a male pin through hole, and the male pin through hole is provided with a joint hole matched with the joint structure; the elastic piece supports the terminal base and the contact block, and when the elastic piece is in a natural state, the combination structure of the end portion of the male pin is located in the joint hole of the contact block to form an interlocking joint structure. When the connector provided by the utility model is not plugged, the elastic piece is in a natural state, and the combination structure at the end part of the male pin is positioned in the joint hole of the contact block to form an interlocking joint structure; when the connector is plugged, the housing is pressed to enable the joint structure to be separated from the joint hole, and the interlocking structure is disconnected. Therefore, when the connector falls off, an interlocking joint structure is formed to give an alarm, and the reliability is better.

Description

Technical Field

[0001] The utility model belongs to the technical field of electrical connection, and in particular relates to a normally closed high-voltage interlocking structure. Background Art

[0002] High Voltage Interlock (HVIL) is a safety design method that uses low-voltage signals to monitor the integrity of high-voltage circuits. It serves as a protective measure in connectors or MSD manual maintenance switches to identify abnormal high-voltage circuit disconnections, thereby shutting off the system's high voltage power.

[0003] Existing high-voltage interlock modules, such as patent CN202310345286.6, feature a control switch function. When the connector is not plugged in, the module is in a normally open state, and when plugged in, it is in a normally closed state. When plugged in properly, the interlock is also normally engaged. However, due to the large number of contacts in the high-voltage circuit, misjudgment can easily occur. For example, if the high-voltage circuit is disconnected and the low-voltage circuit remains connected, the module may mistakenly identify the connector as disconnected. Similarly, if the high-voltage circuit is connected and the low-voltage circuit is shorted, the module may also mistakenly identify the connector as disconnected. Therefore, its use has certain drawbacks.

[0004] The information disclosed in this background technology section is only intended to increase the understanding of the overall background of the present invention, and should not be regarded as an admission or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. Utility Model Content

[0005] The purpose of the present invention is to provide a normally closed high voltage interlocking structure, thereby overcoming the above-mentioned defects in the prior art.

[0006] In order to achieve the above object, the utility model provides a normally closed high voltage interlocking structure, comprising a housing, a contact block, an elastic member and a circuit terminal assembly sequentially arranged in the housing;

[0007] The loop terminal assembly includes a terminal base disposed in a housing and a pair of male pins disposed on the terminal base, wherein the ends of the male pins are provided with a coupling structure, the contact block is provided with a male pin through hole, and the male pin through hole is provided with a coupling hole matching the coupling structure;

[0008] The elastic member supports the terminal base and the contact block. When the elastic member is in a natural state, the coupling structure of the male pin end is located in the coupling hole of the contact block to form an interlocking coupling structure.

[0009] Furthermore, as a preference, a limiting structure is provided in the shell, and the limiting structure enables a disconnection gap to be left between the contact block and the inner wall of the shell in the axial direction of the male needle.

[0010] Furthermore, as a preference, the limiting structure is a screw-shaped structure, the contact block is provided with a limiting hole, and the screw-shaped structure limits the contact block when it is located in the limiting hole.

[0011] Furthermore, preferably, the male needle has a joint structure between a male needle body and an end portion, the diameter of the joint structure is larger than the diameter of the male needle body, and the diameter of the male needle through hole on the contact block is larger than the diameter of the male needle body.

[0012] Furthermore, preferably, the male needle body and the engaging structure are an integrated structure.

[0013] Furthermore, preferably, the elastic member is a telescopic spring.

[0014] Furthermore, preferably, a spring hole is provided on the terminal base, and both ends of the telescopic spring are respectively located in the spring hole and the limiting hole of the contact block.

[0015] Furthermore, preferably, the terminal base is provided with a chamfered structure.

[0016] Furthermore, preferably, the end of the male pin away from the housing is connected to the cable.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The utility model provides an engagement structure at the end of the male pin, and an engagement hole at the contact block. When the connector is not plugged in, the elastic member is in a natural state, and the engagement structure at the end of the male pin is located in the engagement hole of the contact block to form an interlocking engagement structure. When the connector is plugged in, the housing is compressed as the connector is plugged in, and the engagement structure is disengaged from the engagement hole, and the interlocking structure is disconnected. Therefore, the interlocking engagement structure is formed and an alarm is issued only when the connector is detached, thereby improving reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is an exploded schematic diagram of a normally closed high-voltage interlocking structure of the present utility model;

[0020] Figure 2 This is a cross-sectional view of a normally closed high-voltage interlocking structure of the utility model in a normally closed state;

[0021] Figure 3 It is a partially enlarged schematic diagram of a cross-sectional view of a normally closed high-voltage interlocking structure of the utility model in a normally closed state;

[0022] Figure 4 This is a cross-sectional view of a normally closed high-voltage interlocking structure of the utility model in a disconnected state;

[0023] Figure 5It is a partially enlarged schematic diagram of a cross-sectional view of a normally closed high-voltage interlocking structure of the present invention in a disconnected state;

[0024] Figure markings: 1-housing, 101-limiting structure, 2-contact block, 201-male needle through hole, 202-engaging hole, 203-limiting hole, 3-elastic part, 401-terminal base, 402-male needle, 403-engaging structure, 404-male needle body, 405-spring hole, 406-chamfered structure, 5-disconnection gap, 6-cable. DETAILED DESCRIPTION

[0025] The specific implementation methods of the present invention are described in detail below, but it should be understood that the protection scope of the present invention is not limited by the specific implementation methods.

[0026] The following is a brief summary of one or more aspects to provide a basic understanding of these aspects. This summary is not an exhaustive overview of all conceivable aspects and is neither intended to identify key or critical elements of all aspects nor to define the scope of any or all aspects. Its sole purpose is to present some concepts of one or more aspects in a simplified form as a prelude to the more detailed description that will be provided later.

[0027] like Figure 1-5 As shown, a normally closed high-voltage interlocking structure includes a housing 1, a contact block 2, an elastic member 3 and a circuit terminal assembly sequentially arranged in the housing 1;

[0028] The loop terminal assembly includes a terminal base 401 disposed in the housing 1 and a pair of male pins 402 disposed on the terminal base 401. The ends of the male pins 402 are provided with a coupling structure 403. The contact block 2 is provided with a male pin through hole 201, and the male pin through hole 201 is provided with a coupling hole 202 matching the coupling structure 403.

[0029] The elastic member 3 supports the terminal base 401 and the contact block 2 . When the elastic member 3 is in a natural state, the coupling structure 403 at the end of the male pin 402 is located in the coupling hole 202 of the contact block 2 to form an interlocking coupling structure.

[0030] In this embodiment, as a specific solution, a limiting structure 101 is provided in the shell 1, and the limiting structure 101 causes the contact block 2 and the inner wall of the shell 1 to leave a disconnection gap 5 in the axial direction of the male needle; more specifically, the disconnection gap 5 can enable the contact block 2 to leave a certain gap with the inner wall of the shell 1 when it slides to the extreme position of the limiting structure 101 in the shell 1, so that the coupling structure 403 at the end of the male needle 402 can be disengaged from the coupling hole 202.

[0031] In this embodiment, as a specific solution, the limiting structure 101 is a screw-shaped structure, and the contact block 2 is provided with a limiting hole 203 . When the screw-shaped structure is located in the limiting hole 203 , the contact block 2 is limited.

[0032] In this embodiment, as a specific solution, the male needle 402 has a male needle body 404 and a coupling structure 403 at the end, the diameter of the coupling structure 403 is larger than the diameter of the male needle body 404, and the diameter of the male needle through hole 201 on the contact block 2 is larger than the diameter of the male needle body 404; in this way, in the initial state, the coupling structure 403 and the coupling hole 202 can be matched, and in the pressurized state, after the coupling structure 403 is disengaged from the coupling hole 202, it can be ensured that the contact block will not contact the male needle 402.

[0033] In this embodiment, as a specific solution, the male needle body 404 and the coupling structure 403 are an integrated structure.

[0034] In this embodiment, as a specific solution, the elastic member 3 is a telescopic spring.

[0035] In this embodiment, as a specific solution, a spring hole 405 is provided on the terminal base 401, and the two ends of the telescopic spring are respectively located in the spring hole 405 and the limiting hole 203 of the contact block 2; more specifically, the limiting hole 203 is composed of two sections of holes with different diameters, wherein the diameter of the section where the telescopic spring is placed is larger than the diameter of the section close to the inner wall of the shell 1, and the telescopic spring serves to support the contact block 2 and the terminal base 401.

[0036] In this embodiment, as a specific solution, the terminal base 401 is provided with a chamfered structure 406 ; this makes it easier for the terminal base 401 to move within the housing 1 .

[0037] In this embodiment, as a specific solution, the end of the male pin 402 away from the housing 1 is connected to the cable 6 .

[0038] The working principle of this utility model is as follows:

[0039] First, assemble the male pin 402 connected to the cable 6 onto the terminal base 401 , install the contact block 2 and the terminal base 401 into the housing 1 in sequence, and assemble the elastic member 3 between the contact block 2 and the terminal base 401 .

[0040] In the initial state, when the connector is not plugged in, the elastic member 3 is in a natural state, and the engagement structure 403 at the end of the male pin 402 is located in the engagement hole 202 of the contact block 2 to form an interlocking engagement structure;

[0041] When the connector is plugged in, the housing 1 is compressed, the engagement structure 403 is disengaged from the engagement hole 202, and the interlocking structure is disconnected; therefore, the interlocking engagement structure is formed and an alarm is sounded only when the connector falls off.

[0042] The utility model is in a normally closed state in a natural state and in a normally open state after being pressurized, and has better reliability.

[0043] The foregoing descriptions of specific exemplary embodiments of the present invention are for purposes of illustration and description. These descriptions are not intended to limit the present invention to the precise forms disclosed, and it is apparent that many modifications and variations are possible in light of the foregoing teachings. The exemplary embodiments have been selected and described for the purpose of explaining the specific principles of the present invention and their practical application, thereby enabling those skilled in the art to realize and utilize a variety of exemplary embodiments of the present invention and various options and variations. The scope of the present invention is intended to be defined by the claims and their equivalents.

Claims

1. A normally closed high voltage interlock structure, characterized in that: It includes a housing, a contact block, an elastic member and a loop terminal assembly which are sequentially arranged in the housing; The loop terminal assembly includes a terminal base disposed in a housing and a pair of male pins disposed on the terminal base, wherein the ends of the male pins are provided with a coupling structure, the contact block is provided with a male pin through hole, and the male pin through hole is provided with a coupling hole matching the coupling structure; The elastic member supports the terminal base and the contact block. When the elastic member is in a natural state, the coupling structure of the male pin end is located in the coupling hole of the contact block to form an interlocking coupling structure.

2. A normally closed high voltage interlock structure according to claim 1, characterized in that: A limiting structure is provided in the shell, and the limiting structure enables the contact block and the inner wall of the shell to leave a disconnection gap in the axial direction of the male needle.

3. A normally closed high voltage interlock structure according to claim 2, characterized in that: The limiting structure is a screw-shaped structure, and the contact block is provided with a limiting hole. When the screw-shaped structure is located in the limiting hole, the contact block is limited.

4. A normally closed high voltage interlock structure according to claim 1, characterized in that: The male needle has a joint structure between a male needle body and an end portion. The diameter of the joint structure is larger than the diameter of the male needle body. The diameter of the male needle through hole on the contact block is larger than the diameter of the male needle body.

5. A normally closed high voltage interlock structure according to claim 4, characterized in that: The male needle body and the engaging structure are an integrated structure.

6. The normally closed high voltage interlock structure according to claim 3, characterized in that: The elastic member is a telescopic spring.

7. A normally closed high voltage interlock structure according to claim 6, characterized in that: The terminal base is provided with a spring hole, and the two ends of the telescopic spring are respectively located in the spring hole and the limiting hole of the contact block.

8. The normally closed high voltage interlock structure according to claim 1, characterized in that: The terminal base is provided with a chamfered structure.

9. The normally closed high voltage interlock structure according to claim 1, characterized in that: The end of the male pin away from the housing is connected to the cable.

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