A push button quick contact point normally closed module
By introducing a combination of a reset spring and a normally closed spring into the button fast contact normally closed module, combined with the design of guide bars and positioning posts, the problems of poor contact and positional offset caused by mechanical fatigue in traditional modules are solved, achieving high-precision and stable circuit operation and extending service life.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- YUEQING YIJIA ELECTRIC APPLIANCE CO LTD
- Filing Date
- 2025-05-13
- Publication Date
- 2026-06-02
AI Technical Summary
Traditional normally closed push button fast contact modules are prone to poor contact and positional misalignment due to mechanical fatigue and wear during long-term use, affecting the accuracy and stability of closing or opening, especially in high-frequency use environments.
A button fast-contact normally closed module was designed, which adopts a combination structure of housing, terminal block, button base, return spring and normally closed spring to ensure that the moving contact and stationary contact remain closed in the initial state. Through the cooperation of guide bar and positioning post, it provides a precise movement path and positioning accuracy, reduces friction, and prevents shaking and contaminant entry.
It improves the contact stability and accuracy between moving and stationary contacts, extends the module's service life, enhances overall stability and durability, and ensures the reliability of the circuit and normal operation under high-frequency conditions.
Smart Images
Figure CN224318324U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of low-voltage electrical technology, and in particular to a button fast contact normally closed module. Background Technology
[0002] In electrical control systems, push-button quick-contact modules are widely used in industrial automation, home appliances, and various mechatronic devices as a core component of manual control equipment. These modules are mainly divided into two types: normally open and normally closed, each suitable for different application scenarios. Specifically, in the normally closed push-button quick-contact module, the moving and stationary contacts remain closed in the initial state. When the user presses the button, the circuit opens; and after the button is released, the circuit automatically returns to a closed state.
[0003] However, traditional normally closed push-button quick-contact modules still face some technical challenges. For example, due to long-term use, the repeated contact and separation between the moving and stationary contacts in traditional normally closed push-button quick-contact modules can easily lead to mechanical fatigue and wear, thus affecting the accuracy and stability of their closing or opening. This phenomenon is particularly pronounced in high-frequency operating environments, potentially causing problems such as poor contact and positional misalignment. Therefore, to address the aforementioned technical problems, this application proposes structural improvements to enhance the contact stability and accuracy between the moving and stationary contacts. Utility Model Content
[0004] This invention proposes a button fast contact normally closed module, which has high contact stability and accuracy between the moving contact and the stationary contact, and solves the above-mentioned problems existing in the use of the prior art.
[0005] The technical solution of this utility model is implemented as follows: A normally closed button fast contact module includes a housing, a terminal block, and a button seat. The housing has a contact cavity, and the button seat is movably disposed within the contact cavity. The upper end of the button seat extends out of the housing, and a return spring is provided on the lower side of the button seat, abutting against the bottom of the contact cavity. Two terminal blocks are provided and respectively installed on the left and right sides of the housing. Each of the two terminal blocks has a stationary contact piece extending into the contact cavity. A stationary contact point is fixedly connected to the stationary contact piece. A sliding groove is provided through the button seat from left to right. A movable contact piece located below the stationary contact piece is slidably disposed on the sliding groove. Movable contacts are provided at both ends of the movable contact piece, and the two movable contacts correspond to the stationary contacts on the left and right sides, respectively. A normally closed spring is provided in the sliding groove, and the normally closed spring presses against the lower end of the movable contact piece to push the movable contact piece toward the stationary contact piece.
[0006] Preferably, the housing is provided with guide strips on both the front and rear sides of the contact cavity. Two guide strips are provided on both the front and rear sides of the contact cavity and are respectively located on the left and right sides of the button base. The front and rear sides of the button base are movably fitted between the two guide strips on the left and right sides.
[0007] Preferably, the button base is provided with positioning posts corresponding to each guide strip, the axial directions of the positioning posts are arranged in parallel left and right directions, and each positioning post slides and engages on the inner side of each guide strip.
[0008] Preferably, the positioning post is rotatably connected to the button base.
[0009] Preferably, the housing has a limiting groove on the front sidewall of the contact cavity located between two guide strips on the front sidewall, and the button seat has a limiting block located in the limiting groove.
[0010] Preferably, the movable contact piece includes limiting protrusions located outside the left and right sides of the sliding groove, and the limiting protrusions are wider than the width of the sliding groove.
[0011] Preferably, the housing has a terminal mounting cavity on both the left and right sides of the contact cavity. The terminal mounting cavity extends through the front side of the housing, and the terminal is installed in the terminal mounting cavity. A housing cover plate is provided on the front side of the housing to close the front side of the terminal mounting cavity and the upper side of the contact cavity. The housing cover plate has a through-hole for the upper end of the button seat to pass through.
[0012] In summary, the beneficial effects of this utility model are as follows:
[0013] 1. This utility model, by setting up a housing, terminal block, button seat, and return spring, and by incorporating a sliding groove and normally closed spring within the button seat, ensures that the moving contact and stationary contact remain closed in the initial state. This design allows the module to maintain high precision and stable closing and opening operations even during long-term use.
[0014] 2. The guide bar design provides a precise up-and-down movement path for the button base, avoiding mechanical failures that may be caused by lateral offset, and improving the overall stability and durability of the module.
[0015] 3. The fit between the positioning post and the guide strip further enhances the positioning accuracy of the button seat, preventing the button seat from shaking due to the gap between it and the guide strip, thus improving the stability and reliability of the structure.
[0016] 4. The positioning pin is rotatably connected to the button base, allowing for a certain degree of rotational freedom, reducing friction and extending the service life of the components.
[0017] 5. The design of the terminal block mounting cavity and housing cover not only facilitates the installation and maintenance of the terminal block, but also provides an additional protective layer to prevent dust and other contaminants from entering the contact cavity, thus extending the service life of the module. Attached Figure Description
[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0020] Figure 2 This is a top view of the present invention;
[0021] Figure 3 for Figure 2 Schematic diagram of the cross-sectional structure along the AA direction;
[0022] Figure 4 This is a schematic diagram of the structure of the shell cover plate of this utility model after it has been exploded open;
[0023] Figure 5 This is a schematic diagram of the structure of the shell cover plate of this utility model;
[0024] Figure 6 This is a schematic diagram of the shell structure of this utility model;
[0025] Figure 7 This is a schematic diagram of the structure of this utility model without the shell cover plate;
[0026] Figure 8 This is a schematic diagram of the structure of this utility model with the shell removed and the shell cover plate remaining;
[0027] Figure 9 for Figure 8 A structural diagram with the two side connectors removed;
[0028] Figure 10 for Figure 8 Top view.
[0029] 1. Housing; 11. Contact cavity; 12. Guide strip; 13. Limiting groove; 14. Terminal block mounting cavity; 15. Insertion hole; 2. Terminal block; 21. Wiring hole; 22. Spring deformation block; 3. Button seat; 31. Sliding groove; 32. Positioning post; 33. Limiting block; 4. Return spring; 5. Stationary contact piece; 51. Stationary contact point; 52. Wiring terminal; 6. Moving contact piece; 61. Moving contact point; 62. Limiting protrusion; 7. Normally closed spring; 8. Housing cover plate; 81. Through hole; 82. Insertion post; 9. Wire clamping spring. Detailed Implementation
[0030] The following will refer to the appendix in the embodiments of this utility model. Figure 1-10 The technical solutions in the embodiments of this utility model are clearly and completely described herein. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0031] Example:
[0032] like Figures 1 to 5 As shown, this utility model discloses a button quick-contact normally closed module, including a housing 1, a terminal block 2, and a button seat 3. The housing 1 has a contact cavity 11, in which the button seat 3 is vertically movable. The upper end of the button seat 3 extends out of the housing 1. A return spring 4 is provided on the lower side of the button seat 3, abutting against the bottom of the contact cavity 11. The return spring 4 is used to push the button seat 3 upward. Additionally, two terminal blocks 2 are provided and respectively installed on the left and right sides of the housing 1. The two terminal blocks 2... Each button seat 3 is provided with a stationary contact piece 5 extending into the contact cavity 11. A stationary contact point 51 is fixedly connected to the stationary contact piece 5. A sliding groove 31 is provided through the button seat 3, and a movable contact piece 6 located below the stationary contact piece 5 is slidably disposed on the sliding groove 31. Movable contacts 61 are provided at both ends of the movable contact piece 6. The two movable contacts 61 correspond to the stationary contacts 51 on the left and right sides, respectively. In addition, a normally closed spring 7 is provided in the sliding groove 31. The normally closed spring 7 is pressed against the lower end of the movable contact piece 6 to push the movable contact piece 6 toward the stationary contact piece 5.
[0033] The working principle of the normally closed fast-contact module of this button is as follows:
[0034] 1. In the initial state: When not pressed, the return spring 4 pushes the button base 3 upward, causing the moving contact 61 on the moving contact 6 to make tight contact with the stationary contact 51 on the stationary contact 5, and the circuit is closed. At this time, the normally closed spring 7 also acts on the moving contact 6 to ensure sufficient pressure between the moving contact 61 and the stationary contact 51 to maintain a good electrical connection. It should also be noted that at this time... Figure 3 As shown, the top of the sliding groove 31 is slightly higher than the stationary contact piece 5, which allows the force of the normally closed spring 7 to be effectively applied to the moving contact piece 6, ensuring that the moving contact 61 and the stationary contact 51 are in close contact.
[0035] 2. When the button base 3 is pressed: When the user applies force to press the button base 3, the button base 3 moves downward against the resistance of the return spring 4. As the button base 3 moves downward, the top of the sliding groove 31 contacts the upper side of the moving contact 6, and then drives the moving contact 6 downward away from the stationary contact 5. During this process, the moving contact 61 gradually separates from the stationary contact 51, causing the circuit to break.
[0036] 3. Release button seat 3: Once the external force is released, the return spring 4 pushes the button seat 3 back to its original position, and the moving contact 61 re-contacts the stationary contact 51, closing the circuit again. The normally closed spring 7 ensures that the moving contact 61 can quickly and accurately return to the position of the stationary contact 51, ensuring the reliability of the circuit closure.
[0037] Furthermore, in order to ensure the stability of the button base 3 when it moves up and down, thereby ensuring the contact stability and accuracy between the moving contact 61 and the stationary contact 51, the housing 1 is provided with guide strips 12 on both the front and rear sides of the contact cavity 11. There are two guide strips 12 on each of the front and rear sides of the contact cavity 11, and they are located on the left and right sides of the button base 3 respectively. The front and rear sides of the button base 3 are movably fitted between the two guide strips 12 on the left and right sides. The design of the guide strips 12 provides the button base 3 with a precise up and down movement path, avoids mechanical failures that may be caused by lateral offset, and improves the overall stability and durability of the module.
[0038] Furthermore, the button base 3 is provided with positioning posts 32 corresponding to each guide bar 12. These positioning posts 32 are arranged parallel to each other axially, and each positioning post 32 slides and engages with the inner side of each guide bar 12. The engagement between the positioning posts 32 and the guide bars 12 further enhances the positioning accuracy of the button base 3, preventing wobbling due to gaps between the button base 3 and the guide bars 12, thus improving the stability and reliability of the structure. Moreover, the positioning posts 32 are rotatably connected to the button base 3. This rotatable connection allows for a certain degree of rotational freedom, reduces friction, and extends the service life of the components.
[0039] To prevent the button base 3 from detaching from the housing 1, therefore... Figure 4 As shown, the housing 1 has a limiting groove 13 located between two guide strips 12 on the front side wall of the contact cavity 11, and the button seat 3 has a limiting block 33 located in the limiting groove 13.
[0040] like Figure 9As shown, the movable contact 6 includes limiting protrusions 62 located on the left and right sides of the sliding groove 31, and the limiting protrusions 62 are wider than the width of the sliding groove 31. Because the movable contact 6 is constrained by the limiting protrusions 62 within the sliding groove 31, it is ensured that it moves only along a predetermined trajectory and will not deviate laterally.
[0041] In this embodiment, the stationary contact 5 includes a terminal 52 extending into the terminal block 2. A wire clamping spring 9 is provided inside the terminal block 2, with one end of the spring clamping spring 9 pressing against the lower side of the terminal 52. The terminal block 2 has a wiring hole 21 leading to the lower side of the terminal 52. Additionally, a spring-loaded deformation block 22 is movably disposed on the terminal block 2, with its inner end abutting against the end of the wire clamping spring 9 that is pressing against the terminal 52. During electrical connection, an external terminal is inserted into the terminal block 2 through the wiring hole, clamped between the wire clamping spring 9 and the terminal of the stationary contact 5, forming a reliable electrical connection. The presence of the spring deformation block 22 allows users to complete the insertion and removal actions more conveniently. Users only need to use a tool to push the spring deformation block 22 inward, so that the wire clamping spring 9 can be deformed at one end of the terminal 52, thereby making it easier for users to quickly insert or remove the external terminal between the wire clamping spring 9 and the terminal 52 of the stationary contact piece 5.
[0042] In this utility model, the housing 1 has a terminal mounting cavity 14 on both the left and right sides of the contact cavity 11. The terminal mounting cavity 14 extends through the front side of the housing 1, and the terminal 2 is installed in the terminal mounting cavity 14. In addition, a housing cover plate 8 is provided on the front side of the housing 1 to cover the front side of the terminal mounting cavity 14 and the upper side of the contact cavity 11. The housing cover plate 8 has a through-hole 81 for the upper end of the button seat 3 to pass through. The design of the terminal mounting cavity 14 and the housing cover plate 8 not only facilitates the installation and maintenance of the terminal 2, but also provides an additional protective layer to prevent dust and other contaminants from entering the contact cavity 11 and extend the service life of the module.
[0043] The installation of the housing 1 and the housing cover plate 8 is specifically as follows: the housing 1 has an insertion hole 15, and the housing cover plate 8 has a corresponding insertion post 82 for inserting into the insertion hole 15.
[0044] It should also be noted that the terms used in this utility model, such as "front", "rear", "vertical", "horizontal", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this utility model.
[0045] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A button quick-contact normally closed module, comprising a housing, a terminal block, and a button base, characterized in that: The housing has a contact cavity, and the button base is movably disposed within the contact cavity. The upper end of the button base extends out of the housing, and a return spring is provided on the lower side of the button base, abutting against the bottom of the contact cavity. Two terminal blocks are provided and are respectively installed on the left and right sides of the housing. Each of the two terminal blocks is provided with a stationary contact piece extending into the contact cavity. A stationary contact point is fixedly connected to the stationary contact piece. A sliding groove is provided through the button base from left to right. A movable contact piece located below the stationary contact piece is slidably disposed on the sliding groove. Movable contacts are provided at both ends of the movable contact piece, and the two movable contacts correspond to the stationary contacts on the left and right sides, respectively. A normally closed spring is provided in the sliding groove. The normally closed spring presses against the lower end of the movable contact piece to push the movable contact piece toward the stationary contact piece.
2. The button fast contact normally closed module according to claim 1, characterized in that: The housing has guide strips on both the front and rear sides of the contact cavity. There are two guide strips on each of the front and rear sides of the contact cavity, and they are located on the left and right sides of the button base respectively. The front and rear sides of the button base are movably fitted between the two guide strips on the left and right sides.
3. A button fast-contact normally closed module according to claim 2, characterized in that: The button base is provided with positioning posts corresponding to each guide bar. The axial directions of the positioning posts are arranged in parallel left and right directions, and each positioning post slides and engages with the inner side of each guide bar.
4. A button fast contact normally closed module according to claim 3, characterized in that: The positioning pin is rotatably connected to the button base.
5. A button fast-contact normally closed module according to claim 2 or 3, characterized in that: The housing has a limiting groove on the front side wall of the contact cavity, located between two guide strips on the front side wall, and the button seat has a limiting block located in the limiting groove.
6. A button fast contact normally closed module according to claim 1, characterized in that: The movable contact plate includes limiting protrusions located outside the left and right sides of the sliding groove, and the limiting protrusions are wider than the width of the sliding groove.
7. A button fast-contact normally closed module according to claim 1, characterized in that: The housing has terminal mounting cavities on both the left and right sides of the contact cavity. The terminal mounting cavities extend through the front of the housing, and the terminal is installed in the terminal mounting cavity. A housing cover plate is provided on the front of the housing to close the front of the terminal mounting cavity and the upper side of the contact cavity. The housing cover plate has a through-hole for the upper end of the button seat to pass through.