High-load electric tool switch

Abstract

The invention relates to the technical field of electric tool switches, and provides a high-load electric tool switch which comprises a base, a cylinder, a terminal body, a bracket, a bridge body, a tension spring body and a rubber plug, the base is provided with a containing cavity, and the cylinder is arranged at the bottom of the base and located in the containing cavity; the terminal body is arranged on the base, the bracket is located on one side of the terminal body and connected to the base, and the bracket is close to the position where the cylinder is located. Two ends of the connecting bridge main body are respectively connected with the terminal main body and the bracket, the connecting bridge main body is provided with a clamping groove, one end of the tension spring main body is clamped in the clamping groove, the other end of the tension spring main body is connected to the cylinder, and the rubber plug is used for pressing the tension spring main body on the cylinder. The application has the effect of improving the use safety of the electric tool switch.

Description

Technical Field

[0001] The present application relates to the technical field of electric tool switches, and in particular to a high-load electric tool switch. Background Art

[0002] Electric tool switches are the products of the rapid development of modern automation technology. They integrate the operating functions of electric tools into a small switch, thus greatly improving the convenience, safety, and environmental protection performance of use. This innovative design not only makes the operation process simpler and more efficient but also ensures that users can operate more safely during use. At the same time, the environmental protection characteristics of electric tool switches also meet the requirements of sustainable development in today's society, reducing energy consumption and environmental pollution, and providing strong support for achieving green production.

[0003] Such as Figure 1 and Figure 2 As shown in the high-power electric tool switches, most of the existing electric tool switches adopt a tension spring structure to provide contact pressure for the moving and static contacts. One end of the tension spring 100 is hooked on the bridge connected with the moving contact, and the other end is hooked on the terminal connected with the bridge.

[0004] In view of the above-related technologies, during use, once due to the large vibration of the electric tool switch, the bridge and the terminal will be instantaneously bounced open. At this time, since the moving and static contacts are connected, a large current will be transmitted along the tension spring, resulting in the tension spring bearing a large current instantaneously, causing the tension spring to heat up and its life to be severely reduced, so it needs to be improved. Summary of the Invention

[0005] In order to improve the safety of using an electric tool switch, the present application provides a high-load electric tool switch.

[0006] The high-load electric tool switch provided by the present application adopts the following technical solutions: A high-load electric tool switch includes a base, a cylinder, a terminal body, a bracket, a bridge body, a tension spring body, and a rubber plug. The base is provided with a receiving cavity, the cylinder is arranged at the bottom of the base and is located in the receiving cavity; the terminal body is arranged on the base, the bracket is located on one side of the terminal body and is connected to the base, and the bracket is close to the position where the cylinder is located; Both ends of the bridge body are respectively connected to the terminal body and the bracket. A card slot is opened on the bridge body. One end of the tension spring body is clamped in the card slot, the other end of the tension spring body is connected to the cylinder, and the rubber plug is used to press the tension spring body against the cylinder.

[0007] By adopting the above technical solution, the contact pressure of the electric tool switch is also realized by the main body of the tension spring. However, one end of the main body of the tension spring is hooked on the bridge main body riveted with the moving contact, and the other end is not directly installed on the terminal main body, but is assembled on the cylinder of the plastic insulating base. During the use of the electric tool switch, if the bridge main body and the terminal main body bounce open, the current will not pass through the main body of the tension spring, thereby reducing the heating of the main body of the tension spring and improving the safety of the use of the electric tool switch.

[0008] Preferably, a first groove is formed on the base, and the terminal main body is snap-fitted into the first groove; a limiting block is provided on the base, the limiting block is located in the accommodating cavity and is offset from the first groove, one end of the terminal main body is bent to form a bent portion, and when the terminal main body is connected to the base, the bent portion abuts against the limiting block; a moving contact terminal is provided on the bent portion, and one end of the bridge main body abuts against the moving contact terminal.

[0009] By adopting the above technical solution, the terminal main body can be snap-fitted into the first groove, realizing the detachable installation of the terminal main body on the base. At the same time, after the terminal main body is stuck on the base, the bent portion can abut against the limiting block, thereby reducing the possibility of the terminal main body disengaging from the first groove and improving the connection stability. And the end of the bridge main body can abut against the moving contact terminal, realizing the surface contact between the bridge main body and the terminal main body.

[0010] Preferably, a second groove is formed on the base, the second groove is parallel to the first groove and is close to the cylinder, and the bracket is snap-fitted into the second groove; an installation groove is formed on the bracket, and one end of the bridge main body is snap-fitted into the installation groove.

[0011] By adopting the above technical solution, the bracket is detachably installed on the base by being snapped into the second groove. One end of the bridge main body away from the terminal main body can be snap-fitted into the installation groove, realizing the detachable connection between the bridge main body and the bracket.

[0012] Preferably, one end of the main body of the tension spring is designed with a semi-open end and is hooked on the card slot, the other end of the main body of the tension spring is designed with a closed end and is sleeved on the cylinder, and a relief hole is formed on the rubber plug, the relief hole passes through the cylinder and presses the main body of the tension spring against the cylinder.

[0013] By adopting the above technical solution, the end where the main body of the tension spring has a semi-open end can be hooked on the card slot of the bridge main body, and the closed end can be sleeved on the cylinder, thereby realizing the installation of the main body of the tension spring. After the main body of the tension spring is installed, then use the rubber plug to pass through the cylinder and press the main body of the tension spring against the cylinder to improve the stability of the main body of the tension spring.

[0014] Preferably, two installation grooves are provided, and two bridge connection bodies are arranged in parallel. The two bridge connection bodies are respectively clamped in the two installation grooves, and both bridge connection bodies are connected to the cylinder body through the main body of the tension spring.

[0015] By adopting the above technical solution, the two bridge connection bodies can increase the contact area between the static contact and the moving contact.

[0016] Preferably, one end of the bridge connection body close to the main body of the tension spring is bent upward to form a contact part; a trigger assembly is further included, and the trigger assembly controls the disconnection and connection between the bridge connection body and the terminal body by pressing the contact part.

[0017] By adopting the above technical solution, the trigger assembly controls the disconnection and connection between the bridge connection body and the terminal body by pressing the contact part, so as to cut off the power supply of the electric tool switch.

[0018] Preferably, a bullet head elastically pushed against the outer surface of the bridge connection body is arranged on the trigger assembly. The bullet head is located in the accommodation cavity and above the bridge connection body. The bullet head is driven by the trigger assembly and reciprocates back and forth along the outer surface of the bridge connection body, driving the front and rear ends of the bridge connection body to respectively rise or fall in a seesaw manner.

[0019] By adopting the above technical solution, the trigger assembly is pressed and moved inward, driving the bullet head to slide backward. The bullet head pushes against the rear end of the bridge connection body, causing the bridge connection body to quickly descend, realizing the quick connection and conduction between the static contact terminal and the moving contact terminal on the bent part.

[0020] When the trigger assembly moves outward to reset and drives the bullet head to slide forward, the bullet head pushes against the front end of the bridge connection body, causing the bridge connection body to quickly rise. At this time, the static contact terminal and the moving contact terminal are quickly disconnected from conducting electricity.

[0021] Preferably, a return spring is arranged on the trigger assembly, and the bullet head reciprocates linearly through the return spring.

[0022] By adopting the above technical solution, the return spring has good elastic deformation ability and can be used to control the reciprocating movement of the bullet head, realizing the switching between the power-off and power-on of the electric tool switch.

[0023] Preferably, a pressing block is integrally connected to the bullet head, and the pressing block is used to press against the contact part.

[0024] By adopting the above technical solution, the existence of the pressing block can replace the contact between the bullet head and the contact part, thereby controlling the tilting of the bridge connection body.

[0025] Preferably, a reversing rod is provided on the trigger assembly, and the reversing rod is used to control the forward and reverse rotations of the electric tool switch; a locking block is connected to the reversing rod, and a groove is formed on the trigger assembly. When the locking block is engaged in the groove, the stroke of the trigger assembly is locked.

[0026] By adopting the above technical solution, during use, the operator can control the reversing rod to move upward, and there is no signal output from the PCB, which is defaulted to forward rotation; after pressing the trigger assembly until it is turned on, the electric tool switch starts to rotate forward. When the tool is in the forward rotation state, continue to press the trigger assembly to the end and then move the reversing rod to the middle, so that the locking block on the reversing rod is engaged in the groove, and the stroke of the trigger assembly is locked. At this time, the tool can continuously operate at the maximum speed without pressing the trigger. When it is necessary to stop working, just move the reversing rod upward, and the trigger assembly will automatically return to its original position. By adding a locking function to the reversing rod, the locking mechanism has a simple and stable structure, which is convenient for the operator to flexibly control during the production process.

[0027] In summary, the present application includes at least one of the following beneficial technical effects: (1) By providing a cylinder, a main body of a tension spring, and a rubber plug, one end of the main body of the tension spring is hooked on the bridge main body riveted with a moving contact, and the other end is not directly installed on the terminal main body, but is assembled on the cylinder of the plastic insulating base. During the use of the electric tool switch, if the bridge main body and the terminal main body bounce off, the current will not pass through the main body of the tension spring, thereby reducing the heating of the main body of the tension spring, achieving an increase in the stability of the switch and the ability to carry a large current, and improving the service life of the switch.

[0028] (2) By providing a trigger assembly, the bullet head on the trigger assembly moves back and forth to control the seesaw-like rise or fall of the front and rear ends of the bridge main body, thereby achieving the conduction or power-off of the electric tool switch.

[0029] (3) By providing a locking block on the reversing rod, when the tool is in the forward rotation state, the operator can engage the locking block on the reversing rod in the groove, thereby locking the stroke of the trigger assembly. Description of the Drawings

[0030] Figure 1 is a schematic structural diagram of an electric tool switch in the prior art; Figure 2 is an exploded schematic diagram of an electric tool switch in the prior art; Figure 3 is a schematic structural diagram of an electric tool switch in an embodiment of the present application; Figure 4 is an exploded schematic diagram of an electric tool switch in an embodiment of the present application; Figure 5It is a schematic structural diagram of the terminal body and the bracket installed on the base in the embodiment of the present application; Figure 6 It is a schematic structural diagram of a set of bridge connection bodies installed on the terminal body and the bracket in the embodiment of the present application; Figure 7 It is a schematic structural diagram of two sets of bridge connection bodies installed on the terminal body and the bracket in the embodiment of the present application; Figure 8 It is an exploded schematic diagram of the base and the trigger assembly in the embodiment of the present application; Figure 9 It is a schematic diagram of five states in which the reversing lever controls the self-locking of the power tool switch in the embodiment of the present application.

[0031] Reference numerals: 1, base; 2, cylinder; 3, terminal body; 4, bracket; 5, bridge connection body; 6, tension spring body; 7, rubber plug; 8, accommodation cavity; 9, card slot; 10, relief hole; 11, first groove; 12, limiting block; 13, bending part; 14, moving contact terminal; 15, second groove; 16, installation groove; 17, contact part; 18, trigger assembly; 19, bullet head; 20, pressing block; 21, reversing lever; 22, locking block; 23, groove. Detailed implementation manners

[0032] Next, the technical solutions of the present application will be described in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. The present application can be embodied in many different forms and is not limited to the embodiments described herein.

[0033] In the description of the present application, the reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics represented in connection with the embodiment or example are included in at least one embodiment or example of the present application. Moreover, the specific features, structures, materials or characteristics represented can be combined in any one or more embodiments or examples in a suitable manner.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the present application; the terms "including" and "having" and any variations thereof in the specification and claims of the present application and the above drawings are intended to cover non-exclusive inclusion.

[0035] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installation", "connection", "linkage", "fixation" should be understood in a broad sense. For example, it can be a fixed connection; it can also be a detachable connection; or integrated; or a mechanical connection. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0036] The following will describe in detail some embodiments of the present application with reference to the accompanying drawings. Without conflict, those skilled in the art can combine and combine the different embodiments or examples represented in the present application and the features of different embodiments or examples.

[0037] The embodiments of the present application disclose a high-load electric tool switch. Referring to Figure 3 and Figure 4 , the electric tool switch includes a base 1, a cylinder 2, a terminal body 3, a bracket 4, a bridge body 5, a spring body 6, and a rubber plug 7. The base 1 is used as an installation carrier and is made of an insulating material. A receiving cavity 8 is formed on the base 1. The cylinder 2 is horizontally arranged at the bottom of the base 1 and is located in the receiving cavity 8. The terminal body 3 is installed on the base 1. The bracket 4 is located on one side of the terminal body 3 and is also installed on the base 1. The bracket 4 is close to the position where the cylinder 2 is located.

[0038] Both ends of the bridge body 5 are respectively connected to the terminal body 3 and the bracket 4. A slot 9 is formed on the bridge body 5. One end of the spring body 6 is clamped in the slot 9, and the other end of the spring body 6 is detachably connected to the cylinder 2. The rubber plug 7 is used to press the spring body 6 against the cylinder 2. In this embodiment, one end of the spring body 6 is designed with a semi-open end, and the semi-open end is hooked on the slot 9; the other end of the spring body 6 is designed without an opening, and the closed end is sleeved on the cylinder 2, so as to realize the installation of the spring body 6. And a relief hole 10 is formed on the rubber plug 7. The relief hole 10 is used for the cylinder 2 to pass through, so that the rubber plug 7 can press the spring body 6 against the cylinder 2, restricting the relative position of the spring body 6 and the cylinder 2 and improving the stability of the spring body 6.

[0039] The contact pressure of the electric tool switch of the present application is also realized through the spring body 6. However, one end of the spring body 6 is hooked on the bridge body 5 riveted with the moving contact, and the other end is not directly installed on the terminal body 3, but is assembled on the cylinder 2 of the plastic insulating base 1. During the use of the electric tool switch, if the bridge body 5 and the terminal body 3 bounce open, the current will not pass through the spring body 6, thereby reducing the heating of the spring body 6, increasing the stability of the switch and the ability to carry excessive current, and realizing the improvement of the safety and service life of the electric tool switch.

[0040] Specifically, a first groove 11 is formed on the base 1, and the terminal body 3 is snap-fitted into the first groove 11, realizing the detachable installation of the terminal body 3 on the base 1. A limiting block 12 is fixedly connected to the base 1. The limiting block 12 is located in the accommodating cavity 8 and is offset from the first groove 11, and the limiting block 12 is positioned above the first groove 11. One end of the terminal body 3 is bent to form a bent portion 13. After the terminal body 3 is snap-fitted onto the base 1, the lower surface of the bent portion 13 abuts against the limiting block 12, reducing the possibility of the terminal body 3 disengaging from the first groove 11 and improving the connection stability. A moving contact terminal 14 is arranged on the upper surface of the bent portion 13, and one end of the connection bridge body 5 abuts against the moving contact terminal 14, realizing the surface contact between the connection bridge body 5 and the terminal body 3.

[0041] A second groove 15 is further formed on the base 1. The second groove 15 is parallel to the first groove 11 and is close to the cylinder 2. The bracket 4 is plate-shaped and is snap-fitted into the second groove 15, realizing the detachable installation of the bracket 4 and the base 1. An installation groove 16 is formed at one end of the bracket 4 located in the accommodating cavity 8, and one end of the connection bridge body 5 is snap-fitted into the installation groove 16, realizing the detachable connection between the connection bridge body 5 and the bracket 4. As shown in the figure, in this embodiment, two installation grooves 16 are formed on the bracket 4, and two connection bridge bodies 5 are arranged in parallel. The two connection bridge bodies 5 can increase the contact area between the moving and static contacts. One end of each of the two connection bridge bodies 5 is snap-fitted into one of the two installation grooves 16 respectively, and the other ends of the two connection bridge bodies 5 are both lapped on the terminal body 3. At the same time, each connection bridge body 5 is connected with a tension spring body 6, and the two connection bridge bodies 5 are connected to the cylinder 2 through the two tension spring bodies 6.

[0042] Combined with Figures 5 to 7 , during installation, first install the terminal body 3 and the bracket 4 onto the base 1 (as shown in Figure 5 ); then install one end of the tension spring body 6 onto the cylinder 2 of the base 1 and install the rubber plug 7 to fix the tension spring body 6. Then, snap one end of the connection bridge body 5 onto the bracket 4, place the other end on the terminal body 3, and at the same time hook the other end of the tension spring body 6 onto the connection bridge body 5 to complete the installation.

[0043] Combined with Figure 8, in addition, one end of the bridge body 5 close to the main body of the tension spring 6 is bent upward to form a contact part 17. The power tool switch further includes a trigger assembly 18, and the trigger assembly 18 controls the disconnection and contact of the bridge body 5 and the terminal body 3 by pressing against the contact part 17, so as to cut off the power of the power tool switch. An elastic bullet 19 is mounted on the trigger assembly 18 and is pushed against the outer surface of the bridge body 5. The bullet 19 is located in the accommodation cavity 8 and is above the bridge body 5. The bullet 19 is driven by the trigger assembly 18 and reciprocates back and forth along the outer surface of the bridge body 5, driving the front and rear ends of the bridge body 5 to rise or fall in a seesaw manner respectively. In this embodiment, the bullet 19 reciprocates linearly through a return spring. Wherein, a pressing block 20 is integrally connected to one side surface of the bullet 19 close to the bridge body 5, and the pressing block 20 is used to press against the contact part 17.

[0044] When the trigger assembly 18 is pressed inward and moves to drive the bullet 19 to slide backward, the bullet 19 pushes the rear end of the bridge body 5, causing the bridge body 5 to quickly descend, so as to quickly connect and conduct electricity between the static contact terminal and the moving contact terminal 14 on the bent part 13. When the trigger assembly 18 moves outward to reset and drives the bullet 19 to slide forward, the bullet 19 pushes the front end of the bridge body 5, causing the bridge body 5 to quickly rise. At this time, the static contact terminal and the moving contact terminal 14 are quickly disconnected from conducting electricity.

[0045] A reversing lever 21 is also mounted on the trigger assembly 18, and the reversing lever 21 is used to control the forward and reverse rotation of the power tool switch. One end of the reversing lever 21 is fixedly connected with a locking block 22, and a groove 23 is formed on the trigger assembly 18. When the locking block 22 is stuck into the groove 23, the stroke of the trigger assembly 18 will be locked.

[0046] Combined with Figure 9 , during the use process, the operator can control the reversing lever 21 to be toggled upward ( Figure 9 state a in Figure 9 ), the PCB has no signal output, and it is defaulted to forward rotation; after pressing the trigger assembly 18 until it is turned on, the power tool switch starts to rotate forward. When the tool is in the forward rotation state, continue to control the trigger assembly 18 to be pressed to the end and then toggle the reversing lever 21 to the middle ( Figure 9 state b in Figure 9 ), so that the locking block 22 on the reversing lever 21 is stuck into the groove 23 ( Figure 9 state c in Figure 9 ), the stroke of the trigger assembly 18 is locked, and at this time, the tool can continuously work at the maximum speed without pressing the trigger. When it is necessary to stop working, just toggle the reversing lever 21 upward ( Figure 9 state d in Figure 9 ), and the trigger assembly 18 will automatically return to its original position ( Figure 9 state e in

[0047] By adding a locking function to the reversing lever 21, the locking mechanism has a simple and stable structure, which is convenient for the operator to flexibly control during the production process.The implementation principle of a high-load power tool switch in an embodiment of the present application is as follows: The contact pressure of the power tool switch is achieved through the tension spring body 6. One end of the tension spring body 6 is fixed on the bridge body 5 equipped with the moving contact, while the other end is not directly connected to the terminal body 3 but is installed on the cylinder 2 of the plastic insulating base 1. During the operation of the power tool switch, even if the bridge body 5 and the terminal body 3 are separated, the current will not flow through the tension spring body 6. This can reduce the heat generation of the tension spring body 6, enhance the stability of the switch, and improve its ability to withstand large currents. This design helps to improve the safety of the power tool switch and extend its service life.

[0048] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application shall be covered within the protection scope of the present application.

Claims

1. A high-load electric tool switch, characterized in that, It includes a base (1), a cylinder (2), a terminal body (3), a bracket (4), a bridge body (5), a tension spring body (6) and a rubber plug (7). The base (1) is provided with a receiving cavity (8). The cylinder (2) is arranged at the bottom of the base (1) and located in the receiving cavity (8). The terminal body (3) is arranged on the base (1). The bracket (4) is located on one side of the terminal body (3) and connected to the base (1). The bracket (4) is close to the position where the cylinder (2) is located. Both ends of the bridge body (5) are respectively connected to the terminal body (3) and the bracket (4). A clamping groove (9) is formed on the bridge body (5). One end of the tension spring body (6) is clamped in the clamping groove (9), and the other end of the tension spring body (6) is connected to the cylinder (2). The rubber plug (7) is used to press the tension spring body (6) against the cylinder (2).

2. The high-load electric tool switch according to claim 1, wherein A first groove (11) is formed on the base (1). The terminal body (3) is clamped in the first groove (11). A limiting block (12) is arranged on the base (1). The limiting block (12) is located in the receiving cavity (8) and is offset from the first groove (11). One end of the terminal body (3) is bent to form a bending part (13). When the terminal body (3) is connected in the base (1), the bending part (13) abuts against the limiting block (12). A moving contact terminal (14) is arranged on the bending part (13). One end of the bridge body (5) abuts against the moving contact terminal (14).

3. The high-load electric tool switch according to claim 2, wherein, A second groove (15) is formed on the base (1). The second groove (15) and the first groove (11) are parallel to each other and close to the cylinder (2). The bracket (4) is clamped in the second groove (15). An installation groove (16) is formed on the bracket (4). One end of the bridge body (5) is clamped in the installation groove (16).

4. The high-load electric tool switch according to claim 1, characterized in that, One end of the tension spring body (6) is designed with a semi-open mouth and hooked on the clamping groove (9). The other end of the tension spring body (6) is designed with a closed mouth and sleeved on the cylinder (2). A relief hole (10) is formed on the rubber plug (7). The relief hole (10) passes through the cylinder (2) and presses the tension spring body (6) against the cylinder (2).

5. The high-load electric tool switch according to claim 2, characterized in that, Two installation grooves (16) are formed. Two bridge bodies (5) are arranged in parallel. The two bridge bodies (5) are respectively clamped in the two installation grooves (16). The two bridge bodies (5) are both connected to the cylinder (2) through the tension spring body (6).

6. The high-load electric tool switch according to claim 1, wherein One end of the bridge body (5) close to the tension spring body (6) is bent upward to form a contact part (17). It further includes a trigger assembly (18). The trigger assembly (18) controls the disconnection of the bridge body (5) and the terminal body (3) by pressing the contact part (17).

7. The high-load electric tool switch according to claim 6, characterized in that, The trigger assembly (18) is provided with a bullet head (19) that elastically pushes against the outer surface of the bridge body (5). The bullet head (19) is located in the accommodation cavity (8) and above the bridge body (5). The bullet head (19) is driven by the trigger assembly (18) and reciprocates back and forth along the outer surface of the bridge body (5), driving the front and rear ends of the bridge body (5) to form a seesaw-like rise or fall respectively.

8. The high-load electric tool switch according to claim 7, characterized in that, The trigger assembly (18) is provided with a return spring, and the bullet head (19) reciprocates linearly through the return spring.

9. The high-load electric tool switch according to claim 7, characterized in that, The bullet head (19) is integrally connected with a pressing block (20), and the pressing block (20) is used to abut against the contact part (17).

10. A high-load electric tool switch according to claim 7, characterized in that, The trigger assembly (18) is provided with a reversing lever (21), and the reversing lever (21) is used to control the forward and reverse rotations of the electric tool switch; a locking block (22) is connected to the reversing lever (21), and a groove (23) is formed in the trigger assembly (18). When the locking block (22) is engaged in the groove (23), the stroke of the trigger assembly (18) is locked.

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