Double-row self-locking key switch
By adding a double-slam structure to the self-locking key switch and increasing the elasticity of the switch, the problem of low contact pressure in the prior art cannot withstand large impact current, and a higher contact current tolerance is achieved.
Patent Information
- Application Number
- CN202421513402.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-28
- Publication Date
- 2025-05-30
- Estimated Expiration
- 2034-06-28
AI Technical Summary
The dynamic contact plate of the existing self-locking key switch is in direct contact with the static contact plate, resulting in a small contact pressure of the contact point and cannot meet the requirements for the use of large impact current.
A double-row self-locking button switch is designed to increase the elasticity of the switch by adding a double-slam structure, increasing the contact pressure of the dynamic and static contacts, thereby improving the performance of large current impact.
It has achieved a significant increase in contact current, can withstand 150A of impact current, and meets the needs of use.
Smart Images
Figure CN222927349U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of switches, and particularly relates to a double-row self-locking push-button switch. Background Art
[0002] The existing self-locking push-button switch adopts a direct contact method between a moving contact piece and a static contact piece. This on-off structure is too simple, and the elastic force of the switch is low, so the contact pressure of the contact point is small, resulting in limited impact current that the switch can withstand and unable to meet the usage requirements of large impact current. Content of the Utility Model
[0003] In view of the above defects in the prior art, the utility model provides a double-row self-locking push-button switch, which increases the elastic force of the switch and increases the contact pressure between silver contacts so as to improve the large-current impact performance. The specific technical solutions are as follows:
[0004] A double-row self-locking push-button switch includes a base, a switch contact assembly, a push button, a limit hook and a housing. A chamber is provided inside the base, and two groups of switch contact assemblies are installed in the chamber. The push button is slidably installed in the chamber and extends from the side of the base. The push button is provided with a limit groove. The housing is covered above the base, and the limit hook is installed in the housing. Pushing the push button makes the limit hook enter the limit groove to realize self-locking of the push button. A single group of switch contact assembly includes a fixed terminal, a contact piece, a V-shaped elastic piece, a pressing elastic piece and a fulcrum terminal. The fixed terminal is fixedly installed on one side of the base, and a static contact is installed at the upper end of the fixed terminal. The upper end of the contact piece is embedded in the push button, and a moving contact is installed at the lower end of the contact piece. A protrusion for engaging with the V-shaped elastic piece is provided inside the contact piece. An upper protrusion hook is provided at the upper part of the fulcrum terminal, and the V-shaped elastic piece is embedded in the upper protrusion hook. A middle protrusion hook is provided in the middle of the fulcrum terminal, and the pressing elastic piece is embedded in the middle protrusion hook. The upper end of the pressing elastic piece abuts against the V-shaped elastic piece and the lower end abuts against the contact piece. The fulcrum terminal is fixedly installed on the other side of the base.
[0005] As a preferred solution of the utility model, a first hole groove for the protrusion to be engaged is provided at the upper part of the V-shaped elastic piece, a second hole groove for the upper protrusion hook to be embedded is provided at the lower part of the V-shaped elastic piece, and a third hole groove for the middle protrusion hook to be embedded is provided on the pressing elastic piece.
[0006] As a preferred solution of the utility model, both the V-shaped elastic piece and the pressing elastic piece are made of beryllium copper.
[0007] As a preferred solution of the utility model, the part of the push button extending from the side of the base is a rod part, a spring is sleeved at the rod part, and a limit plate is installed at the rod part. When the push button is pushed, the limit plate compresses the spring.
[0008] As a preferred solution of the utility model, one end of the limit hook is connected to the housing and the other end extends into the rod part, and the limit groove is provided at the rod part.
[0009] As a preferred embodiment of the present utility model, the double-row self-locking push-button switch has a length of 24.5 mm, a width of 20 mm, and a height of 18.5 mm.
[0010] Beneficial effects: The single-group switch contact component has a clever structural design. By adding a double elastic sheet structure to increase the switch elasticity, the contact pressure between the moving and static contacts is increased, and the impact current resistance is high, reaching an impact current of 150 A, meeting the usage requirements. Description of the Drawings
[0011] Figure 1 is the perspective view of the present utility model;
[0012] Figure 2 is the exploded view of the present utility model;
[0013] Figure 3 is the perspective view of the switch contact component and the button of the present utility model;
[0014] Figure 4 is the perspective view of the switch contact component and the base of the present utility model;
[0015] Figure 5 is the perspective view of the switch contact component of the present utility model;
[0016] Figure 6 is the perspective view of the button of the present utility model. Detailed Embodiments
[0017] The following further describes the detailed embodiments of the present utility model in conjunction with the drawings:
[0018] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the indicated position or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model.
[0019] In the description of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; 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. 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 circumstances.
[0020] Such as Figures 1 to 5As shown, a double-row self-locking push button switch includes a base 1, a switch contact assembly 2, a button 3, a limit hook 4 and a shell 5. A chamber 6 is provided inside the base 1, and two groups of switch contact assemblies 7 are installed in the chamber 6. The button 3 is slidably installed in the chamber 6, and the button 3 extends from the side of the base 1. The button 3 is provided with a limit groove 8. The shell 5 is covered on the top of the base 1, and the limit hook 4 is installed in the shell 5. The button is pushed so that the limit hook 4 enters the limit groove 8 to realize the self-locking of the button. The single-group switch contact assembly 2 includes a fixed terminal 9, a contact piece 10, a V-shaped spring piece 11, a pressing spring piece 12 and a fulcrum terminal 13. The fixed The fixed terminal 9 is fixedly installed on one side of the base 1, and a static contact 14 is installed on the upper end of the fixed terminal 9. A button is embedded in the upper end of the contact piece 10, and a moving contact 15 is installed at the lower end of the contact piece 10. A protrusion 10a for inserting the V-shaped spring piece 11 is provided on the inner side of the contact piece 10. An upper protruding hook 13a is provided on the upper part of the fulcrum terminal 13, and the V-shaped spring piece 11 is embedded in the upper protruding hook 13a. A middle protruding hook 13b is provided in the middle of the fulcrum terminal 13, and a clamping spring piece 12 is embedded in the middle protruding hook 13b. The upper end of the clamping spring piece 12 presses against the V-shaped spring piece 11 and the lower end presses against the contact piece 10. The fulcrum terminal 13 is fixedly installed on the other side of the base 1.
[0021] Specifically, the upper part of the V-shaped spring piece 11 is provided with a first hole groove 11a for the protrusion 10a to be inserted into, the lower part of the V-shaped spring piece 11 is provided with a second hole groove 11b for the upper protruding hook 13a to be embedded in, and the clamping spring piece 12 is provided with a third hole groove 12a for the middle protruding hook 13b to be embedded in. The matching structure of the contact piece 10, the V-shaped spring piece 11, the clamping spring piece 12 and the fulcrum terminal 13 is reasonably designed to increase the switch elastic force and the contact pressure between the moving and static contacts. The moving and static contacts are silver contacts.
[0022] Specifically, the V-shaped spring piece 11 and the pressing spring piece 12 are both made of beryllium copper, which has good plasticity and electrical conductivity.
[0023] Specifically, the part of the button 3 extending from the side of the base 1 is the rod 3a, the spring 14 is mounted on the rod 3a, and a limit plate 15 is installed on the rod 3a. When the button is pushed, the limit plate 15 compresses the spring 14. The function of the spring 14 is to enable the button 3 to move and reset quickly when it is reset.
[0024] like Figure 6 As shown, one end of the limit hook 4 is connected to the housing 5 and the other end extends into the rod 3a. The limit groove 8 is set at the rod 3a. The shape of the limit groove 8 is shown in the figure. When the button is pushed forward, the limit hook 4 will enter the limit groove 8 to achieve limiting. Press the button again and slightly move the limit hook 4 to reset it.
[0025] Specifically, the double-row self-locking push button switch is 24.5mm long, 20mm wide, and 18.5mm high, and is compact in size.
[0026] The above content is a further detailed description of the present utility model in combination with specific preferred embodiments. It cannot be determined that the specific implementation of the present utility model is only limited to these descriptions. For those of ordinary skill in the technical field to which the present utility model belongs, without departing from the concept of the present utility model, several simple deductions or substitutions can still be made, which should all be regarded as belonging to the protection scope of the present utility model.
Claims
1. A double-row self-locking key switch, comprising a base, a switch contact assembly, a key, a limit hook and a shell. A chamber is provided inside the base, two sets of switch contact assemblies are installed in the chamber, a key is slidably installed in the chamber, the key extends from the side of the base, the key is provided with a limit groove, the shell is covered above the base, a limit hook is installed in the shell, and the key is pushed so that the limit hook enters the limit groove to realize the self-locking of the key, characterized in that: A single-group switch contact assembly includes a fixed terminal, a contact piece, a V-shaped spring piece, a clamping spring piece and a fulcrum terminal. The fixed terminal is fixedly installed on one side of the base. A static contact is installed on the upper end of the fixed terminal. A button is embedded in the upper end of the contact piece. A moving contact is installed on the lower end of the contact piece. A protrusion for inserting the V-shaped spring piece is provided on the inner side of the contact piece. An upper protruding hook is provided on the upper part of the fulcrum terminal. The V-shaped spring piece is embedded in the upper protruding hook. A middle protruding hook is provided in the middle of the fulcrum terminal. The clamping spring piece is embedded in the middle protruding hook. The upper end of the clamping spring piece presses against the V-shaped spring piece and the lower end presses against the contact piece. The fulcrum terminal is fixedly installed on the other side of the base.
2. A double-row self-locking push button switch according to claim 1, characterized in that: The upper part of the V-shaped spring piece is provided with a first hole groove for the protrusion to be inserted into, the lower part of the V-shaped spring piece is provided with a second hole groove for the upper protruding hook to be inserted into, and the pressing spring piece is provided with a third hole groove for the middle protruding hook to be inserted into.
3. A double-row self-locking push button switch according to claim 1 or 2, characterized in that: V-shaped springs and compression springs are both made of beryllium copper.
4. The double-row self-locking push button switch according to claim 1, characterized in that: The part of the button extending from the side of the base is a rod, a spring is sleeved on the rod, and a limit plate is installed on the rod. When the button is pushed, the limit plate compresses the spring.
5. A double-row self-locking push button switch according to claim 4, characterized in that: One end of the limiting hook is connected to the shell and the other end extends into the rod portion, and the limiting groove is arranged at the rod portion.
6. A double-row self-locking push button switch according to claim 4, characterized in that: The double-row self-locking push button switch is 24.5mm long, 20mm wide and 18.5mm high.