Large-current anti-self-locking button switch

Abstract

The utility model provides a large-current anti-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; the button push rod assembly is used for driving the moving contact and the static contact to be in contact connection or separated disconnection; the anti-self-locking button is movably installed on the switch body through a second spring, the anti-self-locking button has a locking state in which the anti-self-locking button is matched with the button push rod assembly for blocking so as to prevent the button push rod assembly from moving towards the first position, and an unlocking state in which the anti-self-locking button is unlocked with the button push rod assembly, and when the button switch is in an opening state, the anti-self-locking button is locked. The anti-self-locking button can be matched with the button push rod assembly for blocking, so that the electric tool is prevented from being started by mistake, and the safety and the reliability are higher.

Description

Technical Field

[0001] The utility model relates to the technical field of switches, in particular to a large-current anti-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, users are prone to accidentally touch the push-button switch, that is, accidentally start the power tool, thus affecting the safety of people and equipment. Summary of the Utility Model

[0004] For this reason, the utility model provides a large-current anti-self-locking push-button switch, which includes a contact component, a U-shaped clamping plate, a button push rod component, and an anti-self-locking button. The contact component includes a static contact and a moving contact swingably mounted on a contact bracket. The U-shaped clamping plate includes a clamping plate body that fits and abuts against the contact bracket, and two elastic arms respectively disposed on both sides of the clamping plate body. The two elastic arms respectively abut against the two 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 anti-self-locking button is movably mounted on the switch body through a second spring. The anti-self-locking button has a locking state that cooperates with the button push rod component to block and prevent the button push rod component from moving in the direction of the first position, and an unlocking state that unlocks the button push rod component.

[0005] The contact bracket includes a first conductive plate, and support plates respectively disposed 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 plate is formed with a swing groove for the protrusions to insert. The bottom of the swing groove is formed with an inverted V-shaped contact portion, and the inverted V-shaped contact portion fits and abuts against the bottom surface of the protrusion.

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

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

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

[0009] The button push rod assembly includes a button and a push rod driven by the button. The moving direction of the anti-self-locking button is perpendicular to the moving direction of the button. The anti-self-locking button has at least one blocking rod extending below the button and abutting against the button.

[0010] The blocking rod includes a connecting rod portion connected to the anti-self-locking button, and a first blocking rod portion and a second blocking rod portion respectively arranged at both ends of the length direction of the connecting rod portion. The first blocking rod portion is bent and connected to the connecting rod portion and extends to the middle position of the bottom of the button, and the second blocking rod portion abuts against the edge of the bottom of the button. The technical solution of the present invention has the following advantages:

[0011] 1. The large-current anti-self-locking push-button switch provided by the present invention includes a contact assembly, a U-shaped clamping plate, a button push rod assembly and an anti-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 open state, the anti-self-locking button can cooperate with the button push rod assembly to block, so as to prevent the button push rod assembly from moving in the direction of the first position (that is, the closing direction), thus avoiding the accidental start of the electric tool and having higher safety and reliability.

[0012] 2. The large-current anti-self-locking push-button switch provided by the present invention, the button push rod assembly includes a button and a push rod driven by the button. The moving direction of the anti-self-locking button is perpendicular to the moving direction of the button. The anti-self-locking button has at least one blocking rod extending below the button and abutting against the button, so as to prevent the button from being pressed down. Description of the Drawings

[0013] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required to be used in the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0014] Figure 1 is a perspective view of the large-current anti-self-locking push-button switch of the present invention;

[0015] Figure 2 is an exploded structural schematic diagram of the large-current anti-self-locking push-button switch;

[0016] Figure 3 is an exploded structural schematic diagram of the contact assembly;

[0017] Figure 4 is a sectional view of the large-current anti-self-locking push-button switch;

[0018] Figure 5Schematic diagram of the cooperation between the button and the anti-self-locking button.

[0019] Description of the reference numerals in the drawings: 1. Switch body; 2. Contact support; 3. Static 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. Bump; 16. Swing groove; 17. Contact part; 18. Wiring board; 19. Pressing arm; 20. Button; 21. Push rod; 22. Link part; 23. First stop rod part; 24. Second stop rod part; 25. Stop rod. Detailed implementation manners

[0020] 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 making creative efforts shall fall within the protection scope of the present utility model.

[0021] 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, and 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.

[0022] 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.

[0023] 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.

[0024] Embodiment

[0025] This embodiment provides a high-current anti-self-locking push-button switch, as Figure 1 and Figure 4As shown, it includes a contact component, a U-shaped clamping plate 5, a button push rod component 8, and an anti-self-locking button 9.

[0026] The contact component, such as Figure 1 , Figure 2 and Figure 3 As shown, it 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. 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. 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 bent and connected to the first conductive plate 13 and extending outside the switch body 1. Pressing arms 19 for pressing wires are provided on both sides of the wiring board 18 and can be bent.

[0027] The button push rod component 8 is movably mounted on the switch body 1 through a first spring 11. It 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 component 8 includes a button 20 and a push rod 21 driven by the button 20.

[0028] The U-shaped clamping plate 5, such as Figure 3 As shown, it includes a clamping plate body 6 in abutting contact with the contact support 2 and two elastic arms 7 disposed on both sides of the clamping plate body 6. The two elastic arms 7 are respectively in corresponding abutting contact with the two side faces of the moving contact 4.

[0029] The anti-self-locking button 9, such as Figure 4 As shown, is movably mounted on the switch body 1 through a second spring 12. The anti-self-locking button 9 has a locking state for cooperating with the button push rod component 8 to block and prevent the button push rod component 8 from moving in the direction of the first position, and an unlocking state for unlocking with the button push rod component 8. The moving direction of the anti-self-locking button 9 is perpendicular to the moving direction of the button 20. The anti-self-locking button 9 has at least one blocking rod 25 extending below the button 20 and abutting against the button 20. In this embodiment, as Figure 5 As shown, the blocking rod 25 includes a connecting rod portion 22 connected to the anti-self-locking button 9 and a first blocking rod portion 23 and a second blocking rod portion 24 disposed at both ends in the length direction of the connecting rod portion 22. The first blocking rod portion 23 is bent and connected to the connecting rod portion 22 and extends to the middle position at the bottom of the button 20. The second blocking rod portion 24 abuts against the bottom edge of the button 20.

[0030] When the button switch is in the off state, the lever 25 of the anti-self-locking button 9 abuts against the bottom of the anti-self-locking button 9, thereby preventing the anti-self-locking button 9 from being pressed down to close the switch; when closing is required, manually drive the lever 25 of the anti-self-locking button 9 to move to the left, thereby releasing the lock on the button.

[0031] The large-current anti-self-locking 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 an anti-self-locking button 9. The U-shaped clamping plate 5 can increase the contact area between the contact bracket 2 and the moving contact 4, thereby being able to carry large currents; in addition, when the button switch is in the off state, the anti-self-locking button 9 can cooperate with the button push rod assembly 8 to block, thereby preventing the button push rod assembly 8 from moving in the direction of the first position (i.e., the closing direction), thus avoiding accidental startup of the power tool and having higher safety and reliability.

[0032] Obviously, the above embodiments are merely examples given for clear illustration and are not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or variations can be made based on 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 creation of the present utility model.

Claims

1. A high current anti-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); An anti-self-locking button (9) is movably mounted on the switch body (1) via a second spring (12), and the anti-self-locking button (9) has a locking state in which it cooperates with the button push rod assembly (8) to block and prevent the button push rod assembly (8) from moving toward the first position, and an unlocking state in which it is unlocked from the button push rod assembly (8).

2. The high current anti-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 anti-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 anti-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 anti-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 anti-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) driven by the button (20); the moving direction of the anti-self-locking button (9) is arranged perpendicular to the moving direction of the button (20); the anti-self-locking button (9) has at least one blocking rod (25) extending below the button (20) and abutting against the button (20).

7. The high current anti-locking push button switch according to claim 6, characterized in that: The blocking rod (25) comprises a connecting rod portion (22) connected to the anti-self-locking button (9), and a first blocking rod portion (23) and a second blocking rod portion (24) respectively arranged at two ends of the connecting rod portion (22) in the length direction, wherein the first blocking rod portion (23) is connected to the connecting rod portion (22) by bending and extends to the middle position of the bottom of the button (20), and the second blocking rod portion (24) abuts against the bottom edge of the button (20).

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