A direct current motor forward and reverse rotation control switch

Abstract

The utility model discloses a direct current motor positive and negative rotation control switch, including base, face cover and axle core, axle core installs inside the switch, and face cover buckle position is buckled tightly with base, and the top of axle core penetrates face cover, the utility model discloses a movable contact switches control direct current electricity positive and negative pole's input and output direction with terminal B and terminal A, thereby changes the direction of direct current motor rotation. The direct current motor positive and negative rotation control switch of the utility model adopts 4 exposed terminals to complete the conversion connection of direct current motor and direct current circuit positive and negative pole, and the connection conversion of internal circuit is completed in the direct current motor positive and negative rotation control switch, and only needs simple electric wire connection. The switch is applied to small household appliance juicer, blender, stock machine and other electric products, and the product reduces assembly process from complete machine finished product assembly, reduces the loss of wire and other materials simultaneously, and greatly saves the cost.

Description

Technical Field

[0001] This utility model relates to the field of motor control switch technology, specifically a DC motor forward and reverse rotation control switch. Background Technology

[0002] Motor forward and reverse control switches are widely used in small household appliances such as blenders, juicers, and slow juicers.

[0003] Existing motor forward / reverse control switches use six exposed terminals connected to external wires, hence the name "6-pin motor forward / reverse control switch." When used in electric juicer products, this switch needs to connect to both the motor circuit and the DC positive / negative circuit, and must control the motor's forward / reverse rotation and stop operation. To achieve this, four metal strips on the 6-pin switch are for DC positive / reverse connections, and two are for the DC motor connection. This requires multiple external wires to connect to the DC positive / reverse circuit, increasing assembly steps, wiring, and terminals, thus raising production costs.

[0004] In view of this, we have introduced a DC motor forward and reverse rotation control switch. Utility Model Content

[0005] The purpose of this invention is to provide a DC motor forward and reverse rotation control switch to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a DC motor forward and reverse rotation control switch, comprising: a base, a cover, and a shaft core;

[0007] The shaft is installed inside the base, and the cover is fastened to the top of the base. The cover is used to seal the cover and prevent external dust from entering. The top of the shaft penetrates through the cover, and the bottom of the shaft is integrally provided with a disc. The inside of the base is equipped with spring terminals on both sides, and one end of the spring terminal penetrates through the base to form a stable electrical connection with the external circuit and provide a conductive path. The disc is equipped with a drive mechanism. The sliding core column of the drive mechanism and the concave groove opened on the surface of the disc cooperate to work together. When the shaft is manipulated, it drives the sliding core column and the concave groove in the disc to rotate, thereby driving the spring terminal to adjust to different positions in the base, thereby changing the connection state of the circuit and realizing the switching of the motor forward and reverse rotation.

[0008] Preferably, the driving mechanism includes a placement groove inside the disc, the placement groove being a cylindrical hole, a pass spring being provided inside the placement groove, a sliding core column slidingly connected inside the placement groove and located on both sides of the pass spring, a concave groove being formed on the surface of the disc, and a protrusion on one side of the surface of the spring terminal for contacting the concave groove and the pass spring; when the disc rotates, the concave groove pushes the protrusion, and at the same time the pass spring provides elastic force to the sliding core column, working together to enable the spring terminal to stably change position, ensuring the reliability of circuit switching.

[0009] Preferably, the top of the disc is integrally provided with an arc-shaped block, there are two sets of arc-shaped blocks, and a torsion spring is installed on the surface of the shaft core between the disc and the two sets of arc-shaped blocks; the two ends of the torsion spring abut against the two sets of arc-shaped blocks respectively. When the shaft core rotates, the arc-shaped blocks will squeeze the torsion spring to deform it. When the shaft core rotation control DC motor is reversed, the torsion spring generates a reset force on the shaft core, that is, the shaft core needs to be manually ensured that the wheel core cannot rotate. Under the action of the torsion spring, the shaft core returns to the DC motor stop working position.

[0010] Preferably, a mounting hole is provided on the other side of the surface of the spring terminal, and a moving contact is installed inside the mounting hole; the mounting hole provides a stable mounting position for the moving contact, ensuring that the moving contact will not loosen during the movement of the spring terminal. As a key component for circuit connection and disconnection, the contact state of the moving contact with other contact parts directly determines the circuit connection.

[0011] Preferably, a terminal A is installed inside the base, and a contact part A is connected to the surface of the terminal A. The contact part A is located on one side of the moving contact. The terminal A is connected to a certain terminal of an external motor. When the moving contact contacts the contact part A, a specific current path can be formed to provide circuit conditions for the motor to reverse. The position of the contact part A is precisely set to ensure good conductivity when in contact with the moving contact.

[0012] Preferably, terminal B is installed inside the base above terminal A. The surface of terminal B is connected to contact part B, and contact part A is located on the other side of the moving contact. A slot is opened on the surface of terminal A for placing terminal B. The slot design makes the installation of terminal A and terminal B in the base more compact, saving internal space. At the same time, terminal B is connected to another terminal of the external motor. When the moving contact contacts contact part B, another current path is formed, realizing the forward rotation of the motor.

[0013] The moving contact switches between terminal B and terminal A to control the input and output direction of the DC power supply, thereby changing the direction of rotation of the DC motor. This DC motor forward / reverse control switch uses four metal strips to complete the circuit connection between the DC motor and the DC circuit, and the circuit connection is completed within the DC motor forward / reverse control switch itself, requiring only simple wire connections.

[0014] Preferably, the base has a concave block on one side of the sliding core column, and the end of the sliding core column contacts the concave block; the outline of the concave block matches the movement trajectory of the sliding core column. When the sliding core column rotates with the disc, the concave block can guide and limit the sliding core column, ensuring that the sliding core column slides along the preset path, thereby ensuring the stable operation of the drive mechanism.

[0015] Preferably, the surface of the base is provided with a snap-fit ​​block, and the surface of the cover is provided with a snap-fit ​​groove for corresponding snap-fit ​​block; the dimensions of the snap-fit ​​block and the snap-fit ​​groove are matched with each other, and the cover and the base are tightly connected by interference fit. This connection method is not only convenient for installation and disassembly, but also ensures the sealing between the two, further enhancing the protection effect on internal components.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] The direction of DC motor rotation is changed by switching the input and output directions of the positive and negative terminals of the DC power supply between terminal B and terminal A via a moving contact. This DC motor forward / reverse control switch uses four metal strips to connect the DC motor and the DC circuit, and the internal circuitry is also connected within the switch itself, requiring only simple wire connections. This reduces assembly steps and wire waste, saving costs. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model during an explosion;

[0019] Figure 2 This is a schematic diagram of the structure of the present invention when connected in three dimensions;

[0020] Figure 3 This is a first-view structural schematic diagram of the base, spring-loaded terminal, terminal A, and terminal B of this utility model;

[0021] Figure 4 This is a structural schematic diagram of the base, spring-loaded terminal, terminal A, and terminal B from a second perspective of the present invention.

[0022] Figure 5 This is a schematic diagram of the structure of the disk, spring terminal, terminal A and terminal B of this utility model when they are connected in three dimensions.

[0023] In the diagram: 1. Base; 2. Terminal A; 3. Terminal B; 4. Spring terminal; 5. Moving contact; 6. Overspeed spring; 7. Sliding core column; 8. Shaft core; 9. Torsion spring; 10. Cover; 11. Nut; 12. Snap-fit ​​groove; 13. Snap-fit ​​block; 14. Disc; 15. Arc-shaped block; 16. Placement groove; 17. Mounting hole; 18. Concave groove; 19. Contact part A; 20. Contact part B; 21. Concave block; 22. Protrusion; 23. Empty groove. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed", "equipped with", "sleeved with", "connected", etc., should be interpreted broadly. For example, "connection" 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 a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0026] Please see Figure 1-5 This utility model provides a technical solution: a DC motor forward and reverse rotation control switch, comprising: a base 1 as the basic support component of the entire switch, providing a stable mounting platform for the internal components and ensuring that the components are stable in position during operation; a cover 10 installed on the top of the base 1 by snap-fit, and its tight fit with the base 1 forms an effective sealing structure, which can block external dust, impurities, etc. from entering the switch to the maximum extent, avoiding problems such as poor circuit contact caused by contaminants, and ensuring the long-term stable operation of the switch; a shaft core 8 is a key component for operating the switch, and its top penetrates the cover 10 for easy user operation; and a disc 14 integrally set at the bottom is an important structure for realizing transmission. When the user rotates the shaft core 8, the disc 14 will rotate synchronously.

[0027] The base 1 has two spring terminals 4 installed on its inner sides. The two spring terminals 4 are connected to the positive and negative terminals of the DC motor, and one end passes through the base 1 to connect to the external circuit, forming a stable conductive path to provide current transmission for the motor. The drive mechanism inside the disc 14 is the core of the spring terminal 4 position adjustment. It works by the cooperation of the sliding core column 7 and the concave groove 18 opened on the surface of the disc 14. The drive mechanism includes a set of placement grooves 16, which are opened inside the disc 14. The placement grooves 16 are equipped with a set of pass springs 6 and two sets of sliding core columns 7. The sliding core columns 7 slide in the placement grooves 16 and are located on one side of the pass springs 6. The protrusion 22 on one side of the surface of the spring terminal 4 is connected to the concave groove 18 and the pass spring 6. When the shaft core 8 is manipulated to drive the disk 14 to rotate, the change in the contour of the concave groove 18 will cause the protrusion 22 and the spring terminal 4 to move. At the same time, the over-stop spring 6 will exert a force on the sliding core 7, causing the sliding core 7 to slide in the placement groove 16. After the disk 14 rotates to the designated position, the sliding core 7 inside the disk 14 will contact the protrusion 22 on the surface of the spring terminal 4. Under the elastic force of the over-stop spring 6, the spring terminal 4 with the moving contact 5 will be driven to approach the contact part A19 on the surface of the terminal A2 and make close contact with it. At this time, the current flows into the terminal A2 through the spring terminal 4, the moving contact 5, and the contact part A19, forming a reverse current path and driving the motor to reverse.

[0028] Two sets of arc-shaped blocks 15 are integrally set on the top of the disc 14, which cooperate with the torsion spring 9 mounted on the surface of the shaft core 8. The torsion spring 9 is located between the disc 14 and the two sets of arc-shaped blocks 15. When the shaft core 8 rotates, the torsion spring 9 will deform and generate a restoring force. After the shaft core 8 stops rotating (stops the driving force), the torsion spring 9 can drive the shaft core 8 and the disc 14 to reset, ensuring the convenience and accuracy of the switch operation.

[0029] A moving contact 5 is installed in the mounting hole 17 on the other side of the surface of the spring contact terminal 4. The moving contact 5 is a key contact component for realizing the circuit opening and closing and switching. The terminals A2 and B3 installed inside the base 1 correspond to different connection states of the circuit. The contact part A19 on the surface of terminal A2 and the contact part B20 on the surface of terminal B3 are located on both sides of the moving contact 5. When the spring contact terminal 4 changes position under the action of the drive mechanism, the moving contact 5 will contact the contact part A19 or the contact part B20 accordingly, thereby realizing the circuit switching and controlling the motor to rotate forward or reverse. The slot 23 on the surface of terminal A2 is used to place terminal B3, making the installation layout of the two more reasonable and saving internal space.

[0030] The concave block 21 inside the base 1, located on one side of the sliding core 7, contacts the end of the sliding core 7, and plays a limiting and guiding role in the sliding of the sliding core 7, ensuring that the sliding core 7 moves within the preset trajectory and improving the stability of the drive mechanism. The snap-fit ​​block 13 on the surface of the base 1 and the snap-fit ​​groove 12 on the surface of the cover 10 cooperate with each other to realize the quick and stable snap-fit ​​between the cover 10 and the base 1, which is convenient for installation and disassembly. The nut 11 screwed on the top of the cover 10 further strengthens the connection between the cover 10 and the shaft core 8.

[0031] Specifically, during use, after the shaft core 8 starts working, since the shaft core 8 and the disc 14 are an integral structure, it will directly drive the bottom disc 14 to rotate synchronously around the central axis inside the base 1. This rotation will trigger a series of linkage reactions in the drive mechanism inside the disc 14:

[0032] A set of placement slots 16 are symmetrically opened inside the disc 14. A set of pass springs 6 and two sliding core columns 7 are installed in the set of placement slots 16. The sliding core columns 7 are located outside the pass springs 6, and the ends of the sliding core columns 7 are always in contact with the concave block 21 on the inner wall of the base 1.

[0033] Meanwhile, a concave groove 18 is formed on the outer circumferential surface of the disk 14, and a protrusion 22 matching the concave groove 18 is provided on the inner side of the spring terminal 4. As the disk 14 rotates, the concave contour of the concave groove 18 causes the protrusion 22 to shift (i.e., move closer to the concave part of the concave groove 18). When the protrusion of the concave groove 18 contacts the protrusion 22, it will cause the spring terminal 4 to deflect to one side (i.e., Figure 3-5 Located between contact portion B19 and contact portion A20, when the recessed portion of the concave groove 18 corresponds to the protruding portion 22, and the spring terminal 4 itself has a certain elasticity, when the moving contact 5 on one side of the spring terminal 4 is tightly attached to the contact portion B20 on one side of the surface of terminal B3, the current flows into terminal B3 through the spring terminal 4, the moving contact 5, and the contact portion B20, forming a positive current path and driving the motor to rotate forward;

[0034] At this time, when the shaft core 8 is rotated, the concave block 21 generates lateral resistance on the sliding core 7, forcing the sliding core 7 to slide radially within the placement groove 16. Simultaneously, the over-speed spring 6 is compressed, and the spring force of the over-speed spring 6 reacts to the sliding core 7, ensuring it remains firmly against the surface of the concave block 21, forming stable mechanical feedback. As the disk 14 continues to rotate, the sliding core 7 inside the disk 14 will disengage into the concave block 21. Further rotation of the disk 14 will... It will contact the protrusion 22 on the surface of the spring terminal 4, and under the elastic force of the overpass spring 6, it will drive the spring terminal 4 with the moving contact 5 to approach the contact part A19 on the surface of terminal A2 and make close contact with it. At this time, the current flows into terminal A2 through the spring terminal 4, the moving contact 5, and the contact part A19, forming a reverse current path and driving the motor to reverse. When the moving contact 5 is in the gap between the contact part A20 and the contact part B19, the circuit is broken and the motor stops running.

[0035] In addition, the two sets of arc-shaped blocks 15 on the top of the disk 14 are symmetrically distributed. The two ends of the torsion spring 9 mounted on the surface of the shaft core 8 are respectively stuck between the two sets of arc-shaped blocks 15. When the shaft core 8 rotates to one side, the arc-shaped block 15 will squeeze one end of the torsion spring 9, causing the torsion spring 9 to undergo elastic deformation and store potential energy. When the shaft core 8 is released, the elastic potential energy of the torsion spring 9 is released, pushing the arc-shaped block 15 to rotate in the opposite direction, thereby driving the shaft core 8 and the disk 14 back to the initial position, ensuring that the moving contact 5 is accurately reset to the de-energized state.

[0036] In terms of structural protection, the snap-fit ​​block 13 at the top of the base 1 and the snap-fit ​​groove 12 at the bottom of the faceplate 10 are tightly snapped together by interference fit to form a sealed cavity, which effectively prevents external dust and moisture from entering the switch.

[0037] The direction of DC motor rotation is changed by switching the input and output directions of the positive and negative terminals of the DC power supply between terminals B3 and A2 via the moving contact 5. This DC motor forward / reverse control switch uses four metal strips to connect the DC motor and the DC circuit, and the internal circuit connection is completed within the switch itself, requiring only simple wire connections. This reduces assembly steps and wire waste, saving costs.

[0038] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A DC motor forward and reverse rotation control switch, characterized in that, include: The base (1), cover (10) and shaft (8) are installed inside the base (1) and the cover (10) is fastened to the top of the base (1). The cover (10) is used to seal the cover (10) to prevent external dust from entering. The top of the shaft (8) passes through the cover (10). The bottom of the shaft (8) is integrally provided with a disc (14). The inner sides of the base (1) are respectively provided with spring terminals (4), and one end of the spring terminal (4) passes through the base (1) to form a stable electrical connection with the external circuit and provide a conductive path. The disc (14) is provided with a drive mechanism inside. The drive mechanism is used in conjunction with the sliding core column (7) and the concave groove (18) opened on the surface of the disc (14). When the shaft (8) is manipulated, it drives the sliding core column (7) and the concave groove (18) in the disc (14) to rotate, thereby driving the spring terminal (4) to adjust to different positions in the base (1).

2. The DC motor forward and reverse rotation control switch according to claim 1, characterized in that, The drive mechanism includes a placement groove (16) inside the disc (14), the placement groove (16) is a cylindrical hole, a pass spring (6) is provided inside the placement groove (16), the sliding core column (7) slides inside the placement groove (16) and is located on one side of the pass spring (6), the concave groove (18) is opened on the surface of the disc (14), and a protrusion (22) is provided on one side of the surface of the spring terminal (4) for contacting the concave groove (18) and the pass spring (6).

3. The DC motor forward and reverse rotation control switch according to claim 1, characterized in that, The top of the disk (14) is integrally provided with an arc-shaped block (15), which consists of two sets, and a torsion spring (9) is installed on the surface of the shaft core (8) between the disk (14) and the two sets of arc-shaped blocks (15).

4. A DC motor forward and reverse rotation control switch according to claim 1, characterized in that, A mounting hole (17) is provided on the other side of the surface of the spring terminal (4), and a moving contact (5) is installed inside the mounting hole (17).

5. A DC motor forward and reverse rotation control switch according to claim 1, characterized in that, The base (1) has a terminal A (2) installed inside, and a contact part A (19) is connected to the surface of the terminal A (2). The contact part A (19) is located on one side of the moving contact (5).

6. A DC motor forward and reverse rotation control switch according to claim 1, characterized in that, The base (1) has a terminal B (3) installed inside above the terminal A (2). The surface of the terminal B (3) is connected to a contact part B (20), and the contact part A (19) is located on the other side of the moving contact (5). The surface of the terminal A (2) has a slot (23) for placing the terminal B (3).

7. A DC motor forward and reverse rotation control switch according to claim 1, characterized in that, The base (1) has a concave block (21) inside on one side of the sliding core column (7), and the end of the sliding core column (7) is in contact with the concave block (21).

8. A DC motor forward and reverse rotation control switch according to claim 1, characterized in that, The base (1) has a snap-fit ​​block (13) on its surface, and the faceplate (10) has a snap-fit ​​groove (12) for corresponding snap-fit ​​block (13) on its surface.

9. A DC motor forward and reverse rotation control switch according to claim 1, characterized in that, The top of the cover (10) is screwed with a nut (11).

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