Large-current self-locking button switch

Abstract

The utility model provides a large-current self-locking button switch, and the switch comprises a contact assembly which comprises a static contact and a moving contact which is disposed on a contact support in a swinging manner. The U-shaped clamping plate comprises a clamping plate main body which abuts against the contact support in an attached mode and two elastic arms which are arranged on the two sides of the clamping plate main body respectively, and the two elastic arms abut against the two side faces of the moving contact correspondingly, so that the contact area of the two elastic arms is increased, and large current can be borne; the button push rod assembly is used for contact connection or separation disconnection of the moving contact and the static contact; the self-locking button is movably installed on the switch body through a second spring, the self-locking button has an initial state when the button push rod assembly is located at the second position and a locking state when the button push rod assembly is located at the first position, and the self-locking button is locked with the button push rod assembly in a matched mode when the button switch is in a closed state. The button push rod assembly can be locked at the first position through the self-locking button, so that the button does not need to be pressed by hands all the time.

Description

Technical Field

[0001] The utility model relates to the technical field of switches, and particularly relates to a large-current self-locking push-button switch. Background Art

[0002] Push-button switches are widely used in the field of hand-held power tools, such as electric drills, electric grinders, electric wrenches, and electric screwdrivers.

[0003] Existing push-button switches are generally suitable for small currents with a load current of about 20A. However, in some occasions, the push-button switch needs to carry large currents (generally with a load current of more than 60A); in addition, when using an electric drill, the user needs to keep pressing the push-button switch, which is rather troublesome. Summary of the Utility Model

[0004] Therefore, the utility model provides a large-current self-locking push-button switch, which includes a contact component, a U-shaped clamping plate, a button push rod component, and a self-locking button. The contact component includes a static contact and a moving contact swingably mounted on a contact support. The U-shaped clamping plate includes a clamping plate body that fits and abuts against the contact support, and two elastic arms respectively arranged on both sides of the clamping plate body. The two elastic arms respectively correspond to and abut against both side faces of the moving contact. The button push rod component is movably mounted on the switch body through a first spring, and has a first position for driving the moving contact to contact and communicate with the static contact, and a second position for driving the moving contact to separate and disconnect from the static contact. The self-locking button is movably mounted on the switch body through a second spring. The self-locking button has an initial state when the button push rod component is in the second position, and a locked state when the button push rod component is in the first position and cooperates with it for locking.

[0005] The contact support includes a first conductive plate, and support plates respectively arranged on both sides of the first conductive plate and perpendicular to it. Protrusions are provided on both sides in the width direction of the moving contact. The support plates are formed with swing grooves for the protrusions to insert. The bottom of the swing groove is formed with an inverted V-shaped contact part, and the inverted V-shaped contact part fits and abuts against the bottom surface of the protrusion.

[0006] The elastic arm is in fitting contact with the side face of the protrusion.

[0007] The contact support also has a wiring board that is bent and connected to the first conductive plate and extends outside the switch body.

[0008] Pressing arms that can be bent for wire pressing are provided on both sides of the wiring board.

[0009] The button push rod assembly includes a button, a push rod and a linkage rod driven by the button. The moving direction of the linkage rod is perpendicular to the moving direction of the self-locking button. The linkage rod is formed with a locking hole, the self-locking button is formed with a locking rod inserted into the locking hole, and a barb portion is arranged at the end of the locking rod. Wherein, when the button push rod assembly is in the first position, the locking rod is inserted into the locking hole, and the barb portion is hooked and connected with the side wall of the locking hole.

[0010] The technical solution of the present utility model has the following advantages:

[0011] 1. The large-current self-locking push-button switch provided by the present utility model includes a contact assembly, a U-shaped clamping plate, a button push rod assembly and a self-locking button. The U-shaped clamping plate can increase the contact area between the contact support and the moving contact, so as to be able to carry large current; in addition, when the push-button switch is in the closed state, the button push rod assembly can be locked at the first position through the self-locking button, so that there is no need to keep pressing the button by hand all the time, and it is more convenient to use.

[0012] 2. For the large-current self-locking push-button switch provided by the present utility model, the contact support further has a wiring board bent and connected with the first conductive plate and extending outside the switch body. Pressing arms for pressing wires are arranged on both sides of the wiring board, so that wiring is more quick and convenient.

[0013] 3. For the large-current self-locking push-button switch provided by the present utility model, the button push rod assembly includes a button, a push rod and a linkage rod driven by the button. The moving direction of the linkage rod is perpendicular to the moving direction of the self-locking button. The linkage rod is formed with a locking hole, the self-locking button is formed with a locking rod inserted into the locking hole, and a barb portion is arranged at the end of the locking rod. Wherein, when the button push rod assembly is in the first position, the driving locking rod is inserted into the locking hole, and the barb portion is hooked and connected with the side wall of the locking hole, so that the button push rod assembly cannot pop up; when unlocking is required, press down the button push rod assembly to separate the barb portion of the locking rod from the side wall of the locking hole, and the self-locking button drives the locking rod to move away from the linkage rod under the elastic force of the second spring, thereby completing the unlocking. Description of the Drawings

[0014] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0015] Figure 1 It is a three-dimensional view of the large-current self-locking push-button switch of the present utility model;

[0016] Figure 2Explosion structure schematic diagram of a large-current self-locking push-button switch;

[0017] Figure 3 Explosion structure schematic diagram of the contact component;

[0018] Figure 4 Cross-sectional view of a large-current self-locking push-button switch (self-locking button in the initial state);

[0019] Figure 5 Cross-sectional view of a large-current self-locking push-button switch (self-locking button in the locked state).

[0020] Explanation of reference numerals: 1. Switch body; 2. Contact support; 3. Stationary contact; 4. Moving contact; 5. U-shaped clamping plate; 6. Main body of the clamping plate; 7. Elastic arm; 8. Button push rod assembly; 9. Self-locking button; 11. First spring; 12. Second spring; 13. First conductive plate; 14. Support plate; 15. Protrusion; 16. Swing groove; 17. Contact part; 18. Wiring board; 19. Pressing arm; 20. Button; 21. Push rod; 22. Linking rod; 23. Lock hole; 24. Lock rod; 25. Barbed part. Detailed implementation manners

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0022] 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 accompanying drawings. It is only for the convenience of describing the present utility model and simplifying the description, 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, and therefore should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0023] In the description of the present utility model, it should be noted that unless otherwise clearly defined and limited, the terms "installation", "connection", "connection" 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 situations.

[0024] In addition, the technical features involved in different embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0025] Embodiment

[0026] This embodiment provides a large-current self-locking push-button switch, as Figure 1 and Figure 4 shown, including a contact assembly, a U-shaped clamping plate 5, a button push rod assembly 8, and a self-locking button 9.

[0027] The contact assembly, as Figure 2 and Figure 3 shown, includes a static contact 3 and a moving contact 4 swingably mounted on a contact support 2. The contact support 2 includes a first conductive plate 13 and support plates 14 disposed on both sides of the first conductive plate 13 and perpendicular thereto. Protrusions 15 are provided on both sides in the width direction of the moving contact 4, and swing grooves 16 for inserting the protrusions 15 are formed in the support plates 14. An inverted V-shaped contact portion 17 is formed at the bottom of the swing groove 16, and the inverted V-shaped contact portion 17 is in abutting contact with the bottom surface of the protrusion 15. The elastic arm 7 is in abutting contact with the side surface of the protrusion 15. The contact support 2 further has a wiring board 18 that is bent and connected to the first conductive plate 13 and extends out of the switch body 1, and pressing arms 19 that can be bent for pressing wires are provided on both sides of the wiring board 18.

[0028] The U-shaped clamping plate 5, as Figure 3 shown, includes a clamping plate main body 6 that abuts against the contact support 2, and two elastic arms 7 disposed on both sides of the clamping plate main body 6. The two elastic arms 7 respectively abut against the two side surfaces of the moving contact 4.

[0029] The self-locking button 9, as Figure 4 and Figure 5 shown, is movably mounted on the switch body 1 through a second spring 12. The self-locking button 9 has an initial state when the button push rod assembly 8 is in the second position, and a locked state when the button push rod assembly 8 is in the first position and cooperates with it for locking.

[0030] The button push rod assembly 8 is movably mounted on the switch body 1 through the first spring 11, and has a first position for driving the moving contact 4 to contact and communicate with the static contact 3, and a second position for driving the moving contact 4 to separate from the static contact 3. The button push rod assembly 8 includes a button 20, a push rod 21 and a linkage rod 22 driven by the button 20. The moving direction of the linkage rod 22 is perpendicular to the moving direction of the self-locking button 9. The linkage rod 22 is formed with a lock hole 23, the self-locking button 9 is formed with a lock rod 24 inserted into the lock hole 23, and a barb portion 25 is provided at the end of the lock rod 24. Wherein, when the button push rod assembly 8 is in the first position, the lock rod 24 is inserted into the lock hole 23, and the barb portion 25 is hooked and connected with the side wall of the lock hole 23.

[0031] The working principle of the large-current self-locking push-button switch of the present utility model is as follows:

[0032] When manually driving the button push rod assembly 8 to move downward so that the moving contact 4 contacts and communicates with the static contact 3 (closing), at this time the first spring 11 stores energy, and then manually driving the self-locking button 9 to move leftward so that the lock rod 24 is inserted into the lock hole 23 of the linkage rod 22, then removing the downward pressure on the button push rod assembly 8, the button push rod assembly 8 will move upward a small distance under the elastic force of the first spring 11, and the lock rod 24 is hooked and connected with the side wall of the lock hole 23. At this time, the push-button switch is still in the closed state, so there is no need to keep pressing the button push rod assembly 8 by hand.

[0033] When unlocking is required, press the button push rod assembly 8 downward so that the lock rod 24 separates from the side wall of the lock hole 23, and the lock rod 24 moves rightward under the elastic force of the second spring 12, so as to separate from the linkage rod 22.

[0034] The large-current self-locking push-button switch provided by the present utility model includes a contact assembly, a U-shaped clamping plate 5, a button push rod assembly 8 and a self-locking button 9. The U-shaped clamping plate 5 can increase the contact area between the contact support 2 and the moving contact 4, so as to be able to carry large current; in addition, when the push-button switch is in the closed state, the button push rod assembly 8 can be locked at the first position through the self-locking button 9, so there is no need to keep pressing the button by hand, and the use is more convenient.

[0035] Obviously, the above-mentioned embodiments are only examples for clear illustration, rather than limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or variations can be made on the basis of the above description. It is not necessary and impossible to enumerate all the implementation manners here. And the obvious changes or variations derived therefrom are still within the protection scope of the creative concept of the present utility model.

Claims

1. A high current self-locking push button switch, characterized in that: include: A contact assembly comprises a stationary contact (3) and a moving contact (4) swingably mounted on a contact support (2); A U-shaped card plate (5) comprises a card plate body (6) that fits against the contact support (2), and two elastic arms (7) arranged on both sides of the card plate body (6), wherein the two elastic arms (7) respectively abut against two side surfaces of the moving contact (4); A button push rod assembly (8) is movably mounted on the switch body (1) via a first spring (11), and has a first position for driving the movable contact (4) to be in contact with the stationary contact (3), and a second position for driving the movable contact (4) to be separated from the stationary contact (3); A self-locking button (9) is movably mounted on the switch body (1) via a second spring (12), wherein the self-locking button (9) has an initial state when the button push rod assembly (8) is in the second position, and a locked state in which the button push rod assembly (8) is locked in cooperation with the button push rod assembly (8) when the button push rod assembly (8) is in the first position.

2. The high current self-locking push button switch according to claim 1, characterized in that: The contact support (2) comprises a first conductive plate (13) and support plates (14) arranged on both sides of the first conductive plate (13) and arranged perpendicularly thereto; protrusions (15) are arranged on both sides of the width direction of the movable contact (4); the support plate (14) is formed with a swinging groove (16) for the protrusion (15) to be inserted; an inverted V-shaped contact portion (17) is formed at the bottom of the swinging groove (16); the inverted V-shaped contact portion (17) is fitted and abutted against the bottom surface of the protrusion (15).

3. The high current self-locking push button switch according to claim 2, characterized in that: The elastic arm (7) is in close contact with the side surface of the protrusion (15).

4. The high current self-locking push button switch according to claim 2 or 3, characterized in that: The contact support (2) also has a wiring board (18) which is connected to the first conductive plate (13) in a bent manner and extends out of the switch body (1).

5. The high current self-locking push button switch according to claim 4, characterized in that: Wire pressing arms (19) which can be bent and used for pressing wires are provided on both sides of the wiring board (18).

6. The high current self-locking push button switch according to claim 1, characterized in that: The button push rod assembly (8) comprises a button (20), and a push rod (21) and a linkage rod (22) driven by the button (20); the movement direction of the linkage rod (22) is perpendicular to the movement direction of the self-locking button (9); the linkage rod (22) is formed with a locking hole (23); the self-locking button (9) is formed with a locking rod (24) inserted into the locking hole (23), and a barb (25) provided at the end of the locking rod (24); wherein, when the button push rod assembly (8) is in the first position, the locking rod (24) is inserted into the locking hole (23), and the barb (25) is hooked and connected to the side wall of the locking hole (23).

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