Magnetic switch

Abstract

The application relates to the technical field of magnetic switches, and discloses a magnetic switch which comprises an upper shell and a lower shell, a moving contact piece is arranged on the upper shell in a sliding mode, a static contact piece is arranged on the lower shell, a groove is arranged on the static contact piece, a protruding block is arranged on the moving contact piece, and the protruding block can be inserted into the groove; when the moving contact piece abuts against the static contact piece, the protruding block is inserted into the groove; the application increases the contact area between the moving contact piece and the static contact piece by inserting the protruding block into the groove, increases the conductive area between the moving contact piece and the static contact piece, reduces the instantaneous temperature when the moving contact piece and the static contact piece are in contact, reduces the situation that the moving contact piece or the static contact piece is stuck or worn, and prolongs the service life of the magnetic switch.

Description

Technical Field

[0001] This application relates to the technical field of magnetic switches, and in particular to a magnetic switch. Background Technology

[0002] Magnetic switches are used for starting cars. When the car is started, the moving contact of the magnetic switch moves and abuts against the stationary contact, completing the electrical connection between the starter and the battery, thus starting the car.

[0003] The magnetic switch includes an upper shell and a lower shell. The upper shell is provided with a moving contact piece, and the lower shell is provided with a stationary contact piece. The upper shell is provided with a driving component, which is used to drive the moving contact piece to abut against the stationary contact piece. When the moving contact piece abuts against the stationary contact piece, the magnetic switch is closed.

[0004] Due to manufacturing errors in the moving and stationary contacts, the planar moving and stationary contacts cannot completely abut against each other, resulting in a small contact area. Furthermore, the instantaneous temperature is high when the moving and stationary contacts come into contact, making them prone to sticking or wear, which affects the ignition and starting of the car. Summary of the Invention

[0005] To address the issue of adhesion or wear between the moving and stationary contacts, this application provides a magnetic switch.

[0006] This application provides a magnetic switch, which adopts the following technical solution:

[0007] A magnetic switch includes an upper shell and a lower shell. A movable contact is slidably disposed on the upper shell, and a stationary contact is disposed on the lower shell. A groove is formed on the stationary contact, and a protrusion is disposed on the movable contact. The protrusion can be inserted into the groove. When the movable contact abuts against the stationary contact, the protrusion is inserted into the groove.

[0008] By adopting the above technical solution, the contact area between the moving contact and the stationary contact is increased by inserting the protrusion into the groove, thereby increasing the conductive area between the moving contact and the stationary contact. This reduces the instantaneous temperature when the moving contact and the stationary contact come into contact, reduces the occurrence of adhesion or wear of the moving contact or the stationary contact, and extends the service life of the magnetic switch.

[0009] Optionally, the upper shell is provided with a mounting ring, the movable contact piece is movably disposed within the mounting ring, the movable contact piece is provided with a moving block, the mounting ring is provided with multiple guide strips, the multiple guide strips extend circumferentially along the mounting ring, the moving block can be located between two adjacent guide strips, the guide strips are provided with guide slopes, the mounting ring is provided with multiple return springs, the return springs are provided with return blocks, the return blocks are provided with a first slope and a second slope, the return block is located on the side of the guide strip closer to the movable contact piece, the first slope and the guide slope face the same direction, the second slope and the guide slope face opposite directions; when the movable contact piece moves closer to the stationary contact piece, the moving block drives the return block to move through the second slope; when the movable contact piece is not under force, the return spring drives the return block to move the moving block away from between the two guide strips, at this time the moving block abuts against the guide slope along the first slope.

[0010] By adopting the above technical solution, when the driving component moves the moving contact piece, the moving block in the moving contact piece moves along the guide slope. Since the second slope and the guide slope are facing opposite directions, the moving block drives the reset block to move through the second slope, so that the moving block can be located between two adjacent guide bars, realizing that the moving contact piece abuts against the stationary contact piece. When the driving component does not drive the moving contact piece, the reset spring drives the moving block to move through the reset block. Since the reset block is located on the side of the guide bar close to the moving contact piece, the moving block moves on the guide bar at the same time as it moves on the first slope. In addition, since the first slope and the guide slope are facing the same direction, the moving block can move from the first slope to the guide slope until the moving block abuts against the second slope, completing the rotation of the moving contact piece. This allows the direction of contact between the moving contact piece and the stationary contact piece to change, and the position of wear of the moving contact piece changes each time, further increasing the service life of the moving contact piece.

[0011] Optionally, the mounting ring has a mounting groove, the lower shell has a mounting spring, the mounting spring has a mounting block for insertion into the mounting groove, and the mounting spring drives the mounting block to be inserted into the mounting groove; when the mounting block is inserted into the mounting groove, the mounting ring is fixed to the lower shell.

[0012] By adopting the above technical solution, the mounting block is inserted into the mounting groove by installing the spring clip, so that the mounting ring and the lower shell can be fixed to each other, reducing the separation of the mounting ring and the lower shell, and fixing the distance between the moving contact and the stationary contact, thereby allowing the moving contact to stably abut against the stationary contact.

[0013] Optionally, the movable contact piece is provided with a stop groove that extends circumferentially along the mounting ring, the mounting ring is provided with a stop hole and a stop strip; when the stop strip is inserted into the stop hole and the stop groove, the movable contact piece is mounted on the mounting ring.

[0014] By adopting the above technical solution, the moving contact is installed in the mounting ring by inserting the stop strip into the stop hole. Since the stop groove extends along the circumference of the mounting ring, the moving contact can move in the mounting ring, so that the moving contact abuts against the stationary contact.

[0015] Optionally, the stop strip has a receiving groove for inserting the mounting block, and the stop strip is slidably connected to the mounting ring; when the mounting block is inserted into the mounting groove, the mounting block is located in the receiving groove, and the stop strip is located in the stop groove.

[0016] By adopting the above technical solution, when the workers assemble the upper and lower shells, the mounting block is located in the mounting groove. At this time, the mounting block can be inserted into the receiving groove. If the mounting block is not inserted into the receiving groove, the mounting spring will protrude, so that the workers can know that the stop strip is not installed properly and need to reinstall the stop strip. At the same time, by having the mounting block located in the receiving groove, the stop strip is fixed in the stop groove, preventing the stop strip from moving and ensuring the stability of the installation of the moving contact piece and the mounting ring. The workers can move the stop strip to remove it from the stop groove, thereby removing the moving contact piece and the mounting ring for easy replacement of the moving contact piece.

[0017] Optionally, the lower shell is provided with a mounting sleeve, and the mounting sleeve has a receiving groove for inserting a mounting spring; when the mounting sleeve is fitted onto the lower shell, the mounting spring is located in the receiving groove.

[0018] By adopting the above technical solution, the staff will put the mounting sleeve on the lower shell and the mounting spring piece will be located in the receiving groove. This allows the mounting sleeve to limit the mounting spring piece, so that the mounting spring piece can stably drive the stop strip into the stop groove, avoiding the unstable connection between the mounting ring and the lower shell due to the shaking of the mounting spring piece.

[0019] Optionally, the protrusion is annular, and the groove is for the protrusion to be inserted; when the movable contact plate rotates, the protrusion can be inserted into the groove.

[0020] By adopting the above technical solution, since the protrusion is ring-shaped, the protrusion can be stably aligned with the groove when the moving contact rotates, which increases the contact area between the moving contact and the stationary contact, increases the conductive area between the moving contact and the stationary contact, reduces the instantaneous temperature when the moving contact and the stationary contact come into contact, reduces the occurrence of adhesion or wear of the moving contact or the stationary contact, and extends the service life of the magnetic switch.

[0021] Optionally, the reset spring is provided with a reset ring, and multiple reset blocks are disposed on the reset ring.

[0022] By adopting the above technical solution, and by setting the reset ring blocks on the reset ring, multiple reset blocks can move synchronously, avoiding the situation where a certain reset spring fails to reset due to elastic fatigue. This allows the moving block to move smoothly from the first inclined plane to the guide inclined plane, thereby realizing the rotation of the moving contact piece.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. By inserting the protrusion into the groove, the contact area between the moving contact and the stationary contact is increased, thus increasing the conductive area between them. This reduces the instantaneous temperature when the moving and stationary contacts come into contact, minimizing the possibility of adhesion or wear between the moving and stationary contacts and extending the service life of the magnetic switch.

[0025] 2. When the driving component moves the moving contact, the moving block in the moving contact moves along the guide slope. Since the second slope and the guide slope face opposite directions, the moving block moves the reset block through the second slope, allowing the moving block to be positioned between two adjacent guide bars, thus enabling the moving contact to abut against the stationary contact. When the driving component does not drive the moving contact, the reset spring moves the moving block through the reset block. Since the reset block is located on the side of the guide bar closer to the moving contact, the moving block slides on the first slope. In addition, since the first slope and the guide slope face the same direction, the moving block can move from the first slope to the guide slope until it abuts against the second slope, completing the rotation of the moving contact. This changes the direction of contact between the moving contact and the stationary contact, and changes the position of wear of the moving contact each time, further increasing the service life of the moving contact. Attached Figure Description

[0026] Figure 1 This is a structural schematic diagram of Example 1;

[0027] Figure 2 This is a schematic diagram of the structure highlighting the lower shell in Embodiment 1;

[0028] Figure 3 This is a schematic diagram of the structure highlighting the upper shell in Embodiment 1;

[0029] Figure 4 This is a structural schematic diagram of Example 2;

[0030] Figure 5 It is along Figure 4 Sectional view of line AA in the middle;

[0031] Figure 6 This is an exploded view of the moving contact piece in Example 2;

[0032] Figure 7 This is an exploded view of the reset block in Example 2.

[0033] Reference numerals: 1. Upper shell; 11. Moving contact piece; 12. Protrusion; 13. Stop groove; 14. Moving block; 2. Lower shell; 21. Stationary contact piece; 22. Groove; 23. Mounting sleeve; 231. Receiving groove; 3. Mounting ring; 31. Stop hole; 32. Stop strip; 321. Receiving groove; 33. Reset ring; 331. Reset block; 332. Reset spring; 334. First inclined surface; 335. Second inclined surface; 34. Guide strip; 341. Guide inclined surface; 35. Mounting groove; 351. Mounting spring; 352. Mounting block; 36. Ring groove. Detailed Implementation

[0034] The following is in conjunction with the appendix Figure 1-7 This application will be described in further detail.

[0035] Example 1

[0036] This embodiment discloses a magnetic switch. (Refer to...) Figure 1 and Figure 2 A magnetic switch includes an upper shell 1 and a lower shell 2, with a driving element provided on the upper shell 1.

[0037] Reference Figure 2 and Figure 3 A movable contact 11 is slidably connected to the upper shell 1, and a stationary contact 21 is fixedly connected to the lower shell 2. When the driving component is activated, the driving component can drive the movable contact 11 to abut against the stationary contact 21, thereby connecting the circuit.

[0038] Reference Figure 2 and Figure 3 The moving contact 11 has multiple protrusions 12 integrally formed on it, and the stationary contact 21 has multiple grooves 22. The protrusions 12 can be inserted into the corresponding grooves 22 to achieve the contact between the moving contact 11 and the stationary contact 21.

[0039] The implementation principle of Example 1 is as follows: when the moving contact 11 abuts against the stationary contact 21, the protrusion 12 is inserted into the groove 22 to increase the contact area between the moving contact 11 and the stationary contact 21.

[0040] Example 2

[0041] Reference Figure 4 and Figure 5 The difference between this embodiment and embodiment 1 is that the upper shell 1 is provided with a mounting ring 3, and the mounting ring 3 has two stop holes 31, which are symmetrically distributed along the axis of the mounting ring 3.

[0042] Reference Figure 5 and Figure 6The movable contact 11 is cylindrical, and a stop groove 13 is formed on its outer circumferential surface. The stop groove 13 extends circumferentially along the outer surface of the movable contact 11 and also extends along the height direction of the movable contact 11. A stop strip 32 is slidably connected to the stop hole 31, and the stop strip 32 can be inserted into the stop groove 13. When the stop strip 32 is inserted into the stop groove 13, the movable contact 11 is mounted on the mounting ring 3.

[0043] Reference Figure 6 The moving contact 11 has a protrusion 12 on its end face. The protrusion 12 is annular. The stationary contact 21 has a groove 22 for the protrusion 12 to be inserted. When the protrusion 12 is inserted into the groove 22, the moving contact 11 abuts against the stationary contact 21.

[0044] Reference Figure 6 and Figure 7 Multiple movable blocks 14 are fixedly connected to the outer surface of the movable contact 11, and the multiple movable blocks 14 are arranged in a circumferential array along the movable contact 11. An annular groove 36 is formed on the inner wall of the mounting ring 3, extending to the end face of the mounting ring 3 away from the lower shell 2. A reset ring 33 is slidably connected within the annular groove 36, and the reset ring 33 moves along the height direction of the mounting ring 3. Multiple reset blocks 331 are fixedly connected to the surface of the reset ring 33 away from the lower shell 2, and the multiple reset blocks 331 are arranged in a circumferential array along the reset ring 33. Multiple reset springs 332 are fixedly connected to the inner wall of the annular groove 36, and the multiple reset springs 332 are all fixedly connected to the surface of the reset ring 33 away from the reset blocks 331. The reset springs 332 drive the reset ring 33 to move away from the lower shell 2.

[0045] Reference Figure 7 Multiple guide bars 34 are fixedly connected to the groove wall of the annular groove 36. The multiple guide bars 34 are arranged in a circumferential array along the mounting ring 3. The moving block 14 can be located between two adjacent guide bars 34, and the multiple guide bars 34 are all located on the side of the reset block 331 away from the moving contact piece 11. A guide slope 341 is formed on the surface of the guide bar 34. The distance between the guide slope 341 and the groove wall of the annular groove 36 away from the moving contact piece 11 gradually decreases along the circumference of the mounting ring 3.

[0046] Reference Figure 7 The reset block 331 has a first inclined surface 334 and a second inclined surface 335 on its surface away from the reset ring 33. The distance between the first inclined surface 334 and the reset ring 33 gradually decreases along the circumference of the mounting ring 3, and the first inclined surface 334 and the guide inclined surface 341 have the same inclination direction. Both the first inclined surface 334 and the guide inclined surface 341 are located on the moving path of the moving block 14. When the reset spring 332 is in a non-forced state, the first inclined surface 334 and the guide inclined surface 341 are coplanar, and the first inclined surface 334 is located on the side of the guide inclined surface 341 away from the lower shell 2.

[0047] Reference Figure 7 The distance between the second inclined surface 335 and the reset ring 33 gradually decreases along the circumference of the mounting ring 3, and the inclination direction of the second inclined surface 335 is opposite to that of the first inclined surface 334. The second inclined surface 335 is located on the moving path of the moving block 14. When the moving block 14 is located between two adjacent guide bars 34, the moving block 14 abuts against the guide inclined surface 341 and the second inclined surface 335.

[0048] Reference Figure 6 and Figure 7 When the driving component moves the moving contact 11 toward the stationary contact 21, the moving block 14 is located between two adjacent guide bars 34. The moving block 14 moves the reset block 331 through the second inclined surface 335, so that the moving block 14 moves the reset block 331 toward the reset ring 33, which compresses the reset spring 332 until the moving contact 11 abuts against the stationary contact 21.

[0049] Reference Figure 7 When the drive unit is not started, the reset spring 332 drives the reset block 331 to move, so that the reset block 331 drives the moving block 14 to disengage from the two adjacent guide bars 34. At this time, the moving block 14 moves along the first inclined surface 334 to the guide inclined surface 341, and moves along the first inclined surface 334 and the guide inclined surface 341 to realize the rotation of the moving contact 11 until the moving block 14 abuts the second inclined surface 335, so that the position of the moving contact 11 can be changed each time it is worn, thereby extending the service life of the moving contact 11.

[0050] Reference Figure 4 and Figure 5 The mounting ring 3 has a mounting groove 35. Two mounting springs 351 are fixedly connected to the outer surface of the lower shell 2, located on opposite sides of the lower shell 2. Mounting blocks 352 are fixedly connected to the surfaces of the mounting springs 351, and can be inserted into the mounting groove 35 to fix the mounting ring 3 and the lower shell 2 together. The surface of the stop strip 32 has a receiving groove 321 for the mounting block 352 to be inserted into. The mounting springs 351 drive the mounting block 352 to move towards the mounting groove 35 and the receiving groove 321. When the mounting block 352 is inserted into the mounting groove 35, it is also located in the receiving groove 321, allowing the stop strip 32 to be stably positioned within the stop groove 13.

[0051] Reference Figure 4 and Figure 5The lower shell 2 is provided with a mounting sleeve 23, which has elastic deformation capability. Two receiving grooves 231 are formed on the inner wall of the mounting sleeve 23, extending through to the end face of the mounting sleeve 23, and the receiving grooves 231 are for inserting the mounting spring piece 351. When the mounting block 352 is inserted into the mounting groove 35 and the receiving groove 321, the mounting sleeve 23 can be fitted onto the mounting spring piece 351, at which time the mounting spring piece 351 is located within the receiving groove 231.

[0052] The implementation principle of Example 2 is as follows: The operator first removes the mounting sleeve 23 from the lower shell 2, then drives the mounting spring 351 to move, so that the mounting block 352 is removed from the mounting groove 35 and the receiving groove 321. Finally, the stop strip 32 is slid to disengage from the stop groove 13 and the stop hole 31, thereby realizing the replacement of the moving contact piece 11.

[0053] Unless otherwise defined, the technical or scientific terms used in this application shall have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," "third," and similar terms used in this application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. The terms "an" or "a" and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms "comprising" or "including" and similar terms mean that the elements or objects preceding "comprising" or "including" encompass the elements or objects listed following "comprising" or "including" and their equivalents, and do not exclude other elements or objects. "Above," "below," "left," "right," etc., are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0054] The above description is only a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the design concept of this application should be included within the protection scope of this application.

Claims

1. A magnetic switch, comprising an upper shell (1) and a lower shell (2), wherein a movable contact piece (11) is slidably disposed on the upper shell (1), and a stationary contact piece (21) is disposed on the lower shell (2), characterized in that: The stationary contact piece (21) has a groove (22) and the movable contact piece (11) has a protrusion (12). The protrusion (12) can be inserted into the groove (22). When the movable contact piece (11) abuts against the stationary contact piece (21), the protrusion (12) is inserted into the groove (22). The upper shell (1) is provided with a mounting ring (3), the movable contact piece (11) is movably disposed within the mounting ring (3), the movable contact piece (11) is provided with a moving block (14), the mounting ring (3) is provided with a plurality of guide strips (34), the plurality of guide strips (34) extend circumferentially along the mounting ring (3), the moving block (14) can be located between two adjacent guide strips (34), the guide strips (34) are provided with guide slopes (341), the mounting ring (3) is provided with a plurality of return springs (332), the return springs (332) are provided with return blocks (331), the return blocks (331) are provided with a first slope (334) and a second slope (335), the return blocks (331) are located on the side of the guide strips (34) near the movable contact piece (11), the first slope (334) and the guide slope (341) are facing the same direction, and the second slope (335) The guide slope (341) faces opposite directions; when the moving contact (11) approaches the stationary contact (21), the moving block (14) drives the reset block (331) to move through the second slope (335); when the moving contact (11) is not under force, the reset spring (332) drives the reset block (331) to move the moving block (14) away from the two guide bars (34), at which time the moving block (14) abuts against the guide slope (341) along the first slope (334).

2. A magnetic switch according to claim 1, characterized in that: The mounting ring (3) has a mounting groove (35), and the lower shell (2) has a mounting spring (351). The mounting spring (351) has a mounting block (352) for insertion into the mounting groove (35). The mounting spring (351) drives the mounting block (352) to insert into the mounting groove (35). When the mounting block (352) is inserted into the mounting groove (35), the mounting ring (3) is fixed on the lower shell (2).

3. A magnetic switch according to claim 2, characterized in that: The movable contact piece (11) is provided with a stop groove (13), which extends circumferentially along the mounting ring (3). The mounting ring (3) is provided with a stop hole (31) and a stop strip (32). When the stop strip (32) is inserted into the stop hole (31) and the stop groove (13), the movable contact piece (11) is mounted on the mounting ring (3).

4. A magnetic switch according to claim 3, characterized in that: The stop strip (32) has a receiving groove (321) for inserting the mounting block (352), and the stop strip (32) is slidably connected to the mounting ring (3); when the mounting block (352) is inserted into the mounting groove (35), the mounting block (352) is located in the receiving groove (321), and the stop strip (32) is located in the stop groove (13).

5. A magnetic switch according to claim 4, characterized in that: The lower shell (2) is provided with an installation sleeve (23), and the installation sleeve (23) has a receiving groove (231) for inserting the installation spring (351); when the installation sleeve (23) is fitted on the lower shell (2), the installation spring (351) is located in the receiving groove (231).

6. A magnetic switch according to claim 1, characterized in that: The protrusion (12) is annular, and the groove (22) is for the protrusion (12) to be inserted; when the movable contact piece (11) rotates, the protrusion (12) can be inserted into the groove (22).

7. A magnetic switch according to claim 1, characterized in that: The reset spring (332) is provided with a reset ring (33), and a plurality of reset blocks (331) are provided on the reset ring (33).

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