CN220439475U - Forward and reverse rotation control switch of direct current motor - Google Patents

Abstract

The utility model provides a direct current motor forward and reverse rotation control switch, comprising: a switch body having a first terminal, a second terminal, a third terminal, and a fourth terminal; the first elastic piece and the second elastic piece are connected with the first terminal at one end, the first movable contact is arranged at the other end, one end of the second elastic piece is connected with the second terminal, the second movable contact is arranged at the other end, and the first movable contact and the second movable contact are movable between the third terminal and the fourth terminal; the knob is rotatably arranged on the switch body and can be matched with the first elastic piece and the second elastic piece, when the knob is in a positive position, the knob drives the first movable contact of the first elastic piece to contact with the third terminal, the knob is separated from the second elastic piece, and the second elastic piece is restored to deform to drive the second movable contact to contact with the fourth terminal; when the rotary knob is at the reversing position, the second movable contact of the second elastic piece is driven to contact with the third terminal, the rotary knob is separated from the first elastic piece, and the first elastic piece is restored to deform so as to drive the first movable contact to contact with the fourth terminal.

Description

Forward and reverse rotation control switch of direct current motor

Technical Field

The utility model relates to the technical field of switches, in particular to a forward and reverse rotation control switch of a direct current motor.

Background

The motor can be used in electric planing machine, bench drill, wire carving machine, drier, lathe, etc. The forward and reverse rotation of the existing motor is generally realized through two control switches, namely one control switch is used for controlling the forward rotation of the motor, and the other control switch is used for controlling the reverse rotation of the motor, so that the motor has a plurality of electrical elements and a complex structure, the product is large in size, and the product miniaturization requirement cannot be met.

Disclosure of Invention

Therefore, the technical problem to be solved by the utility model is to overcome the defects that two control switches are needed to control the forward and reverse rotation of the motor, the number of electrical elements is large and the product size is large in the prior art, so that the forward and reverse rotation control switch of the direct-current motor is provided with a simple structure and a small size.

To this end, the utility model provides a direct current motor forward and reverse rotation control switch, comprising: the switch body is provided with a first terminal and a second terminal which are respectively connected with the positive electrode of the power supply and the negative electrode of the power supply, and a third terminal and a fourth terminal which are respectively connected with the positive electrode of the motor and the negative electrode of the motor; the first elastic piece and the second elastic piece are arranged on the switch body, one end of the first elastic piece is fixedly connected with the first terminal, a first movable contact is arranged at the other end of the first elastic piece, one end of the second elastic piece is connected with the second terminal, a second movable contact is arranged at the other end of the second elastic piece, and the first movable contact and the second movable contact are movably arranged between the third terminal and the fourth terminal; the knob is rotatably arranged on the switch body and can be matched with the first elastic piece and the second elastic piece, and the knob has a forward rotation position and a reverse rotation position; when the knob is at the forward rotation position, the knob drives the first movable contact of the first elastic piece to contact with the third terminal, the knob is separated from the second elastic piece, and the second elastic piece is restored to deform so as to drive the second movable contact to contact with the fourth terminal; when the rotary switch is in the reverse position, the knob drives the second movable contact of the second elastic piece to contact with the third terminal, the knob is separated from the first elastic piece, and the first elastic piece recovers deformation to drive the first movable contact to contact with the fourth terminal.

The knob is further provided with a disconnection position positioned between the forward rotation position and the reverse rotation position, when in the disconnection position, the knob is respectively propped against the first elastic piece and the second elastic piece, a certain gap is reserved between the first movable contact and the third terminal and between the first movable contact and the fourth terminal, and a certain gap is reserved between the second movable contact and the third terminal and between the second movable contact and the fourth terminal.

The knob is provided with a first driving block and a second driving block which are matched with the first elastic piece and the second elastic piece respectively, the first driving block is provided with a first matching surface and a second matching surface which are matched with the first elastic piece, the distance between the first matching surface and the rotation center of the knob is larger than the distance between the second matching surface and the rotation center of the knob, the second driving block is provided with a third matching surface and a fourth matching surface which are matched with the second elastic piece, and the distance between the third matching surface and the rotation center of the knob is larger than the distance between the fourth matching surface and the rotation center of the knob; when the switch-off position is set, the second matching surface is propped against the first elastic piece, and the fourth matching surface is propped against the second elastic piece; when the knob is in the forward rotation position, the first matching surface is propped against the first elastic piece, and the knob is separated from the second elastic piece; when the reversing position is reached, the third matching surface is propped against the second elastic piece, and the knob is separated from the first elastic piece.

A gear positioning structure is arranged between the knob and the switch body.

The gear positioning structure includes: the positioning grooves are arranged on the outer wall of the knob; the elastic positioning sleeve assembly comprises a positioning sleeve and an elastic piece, wherein the positioning sleeve is suitable for propping against the positioning groove, one end of the elastic piece is propped against the switch body, and the other end of the elastic piece is propped against the positioning sleeve.

The third terminal comprises a third pin and a third contact plate which is connected with the third pin in a bending way, the fourth terminal comprises a fourth pin and a fourth contact plate which is connected with the fourth pin in a bending way, and the fourth contact plate and the third contact plate are arranged in an up-down parallel way.

The third contact plate is provided with two first fixed contacts which are arranged corresponding to the first movable contact and the second movable contact, and the fourth contact plate is provided with two second fixed contacts which are arranged corresponding to the first movable contact and the second movable contact.

One end of the first elastic piece is riveted and fixed with the first terminal, and one end of the second elastic piece is riveted and fixed with the second terminal.

The technical scheme of the utility model has the following advantages:

1. the utility model provides a direct current motor forward and reverse rotation control switch, wherein a knob is rotatably arranged on a switch body and can be matched with a first elastic piece and a second elastic piece, and the knob is provided with a forward position and a reverse position; when the rotary knob is in the forward rotation position, the first movable contact of the first elastic piece is driven by the rotary knob to contact with the third terminal, the rotary knob is separated from the second elastic piece, the second elastic piece is restored to deform, the second movable contact is driven to contact with the fourth terminal, namely, the positive electrode of the motor is electrically connected with the positive electrode of the power supply, and the negative electrode of the motor is electrically connected with the negative electrode of the power supply, so that the forward rotation of the motor is realized; when reversing the position, the knob drives the second movable contact and the third terminal of second shell fragment to contact, and knob and first shell fragment separation, and first shell fragment resumes deformation, drives first movable contact and fourth terminal contact, and motor positive pole and power negative pole electricity are connected promptly, and motor negative pole and power positive pole electricity are connected to realize motor reversal, compare with prior art, can realize the positive and negative rotation of motor through a knob, simple structure is established, and the product is miniaturized more.

2. When the direct current motor forward and backward rotation control switch is in an off position, the knob is respectively abutted against the first elastic piece and the second elastic piece, a certain gap is reserved between the first movable contact and the third terminal and between the first movable contact and the fourth terminal, and a certain gap is reserved between the second movable contact and the third terminal and between the second movable contact and the fourth terminal, so that the motor stops working.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

FIG. 1 is a perspective view of a reversible control switch of the present utility model;

FIG. 2 is a perspective view of the switch housing of FIG. 1 with the switch housing removed (knob in an open position);

FIG. 3 is a front view of FIG. 2;

FIG. 4 is a rear view of FIG. 2;

FIG. 5 is a perspective view of the knob in a forward rotated position;

FIG. 6 is a front view of FIG. 5;

FIG. 7 is a rear view of FIG. 5;

FIG. 8 is a perspective view of the knob in the inverted position;

fig. 9 is a front view of fig. 8;

fig. 10 is a rear view of fig. 8.

Reference numerals illustrate: 1. a first terminal; 2. a second terminal; 3. a third terminal; 4. a fourth terminal; 5. a switch body; 6. a first elastic sheet; 7. a second spring plate; 8. a first movable contact; 9. a second movable contact; 10. a knob; 11. a first driving block; 12. a second driving block; 13. a first mating surface; 14. a second mating surface; 15. a third mating surface; 16. a fourth mating surface; 17. a positioning groove; 18. a positioning sleeve; 19. an elastic member; 20. a third pin; 21. a third contact plate; 22. a fourth pin; 23. a fourth contact plate; 24. a first stationary contact; 25. and a second stationary contact.

Detailed Description

The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In addition, the technical features of the different embodiments of the present utility model described below may be combined with each other as long as they do not collide with each other.

Examples

The embodiment provides a direct current motor forward and reverse rotation control switch, as shown in fig. 1 and 2, which comprises a switch body 5, a first elastic piece 6, a second elastic piece 7 and a knob 10.

The switch body 5, as shown in fig. 2 and 3, has a first terminal 1 and a second terminal 2 respectively connected to a positive electrode of a power source and a negative electrode of the power source, and a third terminal 3 and a fourth terminal 4 respectively connected to a positive electrode of a motor and a negative electrode of the motor, the third terminal 3 includes a third pin 20, and a third contact plate 21 bending-connected to the third pin 20, the fourth terminal 4 includes a fourth pin 22, and a fourth contact plate 23 bending-connected to the fourth pin 22, the fourth contact plate 23 and the third contact plate 21 are arranged in parallel up and down, two first stationary contacts 24 are arranged on the third contact plate 21, and two second stationary contacts 25 are arranged on the fourth contact plate

The first elastic piece 6 and the second elastic piece 7 are arranged on the switch body 5, as shown in fig. 2, one end of the first elastic piece 6 is riveted and fixed with the first terminal 1, the other end of the first elastic piece is provided with a first movable contact 8, one end of the second elastic piece 7 is riveted and fixed with the second terminal 2, the other end of the second elastic piece 7 is provided with a second movable contact 9, and the first movable contact 8 and the second movable contact 9 are movably installed between the third terminal 3 and the fourth terminal 4, namely, the first movable contact 8 and the second movable contact 9 are both positioned between the first fixed contact 24 and the second fixed contact 25.

The knob 10 is rotatably installed on the switch body 5 and can be matched with the first elastic piece 6 and the second elastic piece 7, and the knob 10 has an open position in the middle, a forward rotation position and a reverse rotation position. The knob 10 has a first driving block 11 and a second driving block 12 respectively engaged with the first elastic piece 6 and the second elastic piece 7, as shown in fig. 3, the first driving block 11 has a first engaging surface 13 and a second engaging surface 14 engaged with the first elastic piece 6, a distance between the first engaging surface 13 and a rotation center of the knob 10 is greater than a distance between the second engaging surface 14 and a rotation center of the knob 10, as shown in fig. 4, the second driving block 12 has a third engaging surface 15 and a fourth engaging surface 16 engaged with the second elastic piece 7, and a distance between the third engaging surface 15 and a rotation center of the knob 10 is greater than a distance between the fourth engaging surface 16 and a rotation center of the knob 10. A gear positioning structure is arranged between the knob 10 and the switch body 5, and the gear positioning structure comprises: three positioning grooves 17 arranged on the outer wall of the knob 10; the elastic positioning sleeve assembly comprises a positioning sleeve 18 and an elastic piece 19, wherein the positioning sleeve 18 is suitable for propping against the positioning groove 17, one end of the elastic piece 19 is propped against the switch body 5, and the other end of the elastic piece 19 is propped against the positioning sleeve 18.

In the off position, as shown in fig. 3 and 4, the second mating surface 14 of the knob 10 abuts against the first elastic piece 6, the fourth mating surface 16 abuts against the second elastic piece 7, the first elastic piece 6 and the second elastic piece 7 are pressed to store energy, a certain gap is formed between the first movable contact 8 and the third terminal 3 and the fourth terminal 4, and a certain gap is formed between the second movable contact 9 and the third terminal 3 and the fourth terminal 4, that is, the first movable contact 8 and the second movable contact 9 are not contacted with the first stationary contact 24 and the second stationary contact 25, and the motor is powered off to stop working.

When the knob 10 rotates to the forward rotation position shown in fig. 5, taking fig. 3 and 6 as an illustration, the knob 10 rotates counterclockwise from the off position of fig. 3 to the forward rotation position of fig. 6, the first mating surface 13 of the knob 10 abuts against the first spring 6, so as to drive the first spring 6 to move downward, so that the first movable contact 8 of the first spring 6 contacts the first stationary contact 24 of the third terminal 3, and at this time, taking fig. 4 and 7 as an illustration, the knob 10 rotates clockwise from the off position of fig. 4 to the forward rotation position of fig. 7 (it is to be noted that fig. 3 and 4 are respectively a front view and a rear view, since the viewing angle is just opposite, the knob 10 rotates counterclockwise from the viewing angle of fig. 3 to the forward rotation position of fig. 6, and the knob 10 rotates clockwise from the viewing angle of fig. 4 to the forward rotation position of fig. 7), the knob 10 separates from the second spring 7, and the second spring 7 deforms back, so that the second movable contact 9 moves upward, and moves upward to the second movable contact 25 in contact with the forward rotation of the fourth terminal 4.

When the knob 10 rotates from the open position to the reverse position shown in fig. 8, as shown in fig. 9, the knob 10 is separated from the first elastic piece 6, the first elastic piece 6 recovers to deform, so as to drive the first movable contact 8 to move upwards and contact and communicate with the second fixed contact 25 of the fourth terminal 4, and at the moment, the third matching surface 15 of the knob 10 abuts against the second elastic piece 7 (as shown in fig. 10), so as to drive the second elastic piece 7 to act downwards, drive the second movable contact 9 to contact and communicate with the second fixed contact 25 of the fourth terminal 4, and the motor rotates reversely.

In the forward and reverse rotation control switch of the direct current motor, when the direct current motor is in a forward rotation position, the knob 10 drives the first movable contact 8 of the first elastic piece 6 to be in contact with the third terminal 3, the knob 10 is separated from the second elastic piece 7, the second elastic piece 7 recovers deformation, the second movable contact 9 is driven to be in contact with the fourth terminal 4, namely, the motor positive electrode is electrically connected with the power supply positive electrode, and the motor negative electrode is electrically connected with the power supply negative electrode, so that the forward rotation of the motor is realized; when the reversing position is adopted, the knob 10 drives the second movable contact 9 of the second elastic sheet 7 to be in contact with the third terminal 3, the knob 10 is separated from the first elastic sheet 6, the first elastic sheet 6 is restored to deform and drives the first movable contact 8 to be in contact with the fourth terminal 4, namely, the positive electrode of the motor is electrically connected with the negative electrode of the power supply, and the negative electrode of the motor is electrically connected with the positive electrode of the power supply, so that the motor is reversed.

It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the utility model.

Claims (8)

1. A direct current motor forward and reverse rotation control switch, characterized by comprising:

a switch body (5) having a first terminal (1) and a second terminal (2) connected to the positive electrode and the negative electrode of the power source, respectively, and a third terminal (3) and a fourth terminal (4) connected to the positive electrode and the negative electrode of the motor, respectively;

the switch comprises a switch body (5), a first elastic piece (6) and a second elastic piece (7), wherein one end of the first elastic piece (6) is fixedly connected with the first terminal (1), a first movable contact (8) is arranged at the other end of the first elastic piece, one end of the second elastic piece (7) is connected with the second terminal (2), a second movable contact (9) is arranged at the other end of the second elastic piece, and the first movable contact (8) and the second movable contact (9) are movably arranged between the third terminal (3) and the fourth terminal (4);

the knob (10) is rotatably arranged on the switch body (5) and can be matched with the first elastic piece (6) and the second elastic piece (7), and the knob (10) has a forward rotation position and a reverse rotation position;

when the knob (10) drives the first movable contact (8) of the first elastic piece (6) to be in contact with the third terminal (3) and the knob (10) is separated from the second elastic piece (7), the second elastic piece (7) is restored to deform, and the second movable contact (9) is driven to be in contact with the fourth terminal (4);

when the rotary switch is in the reverse position, the knob (10) drives the second movable contact (9) of the second elastic piece (7) to be in contact with the third terminal (3), the knob (10) is separated from the first elastic piece (6), and the first elastic piece (6) is restored to deform to drive the first movable contact (8) to be in contact with the fourth terminal (4).

2. The direct current motor forward and reverse rotation control switch according to claim 1, characterized in that the knob (10) further has an off position located intermediate the forward rotation position and the reverse rotation position, in which off position the knob (10) is pressed against the first spring piece (6) and the second spring piece (7), respectively, and the first movable contact (8) has a certain gap between the third terminal (3) and the fourth terminal (4), respectively, and the second movable contact (9) has a certain gap between the third terminal (3) and the fourth terminal (4), respectively.

3. The direct current motor forward and reverse rotation control switch according to claim 2, characterized in that the knob (10) has a first driving block (11) and a second driving block (12) respectively engaged with the first elastic piece (6) and the second elastic piece (7), the first driving block (11) has a first engagement surface (13) and a second engagement surface (14) engaged with the first elastic piece (6), a distance between the first engagement surface (13) and a rotation center of the knob (10) is larger than a distance between the second engagement surface (14) and the rotation center of the knob (10), the second driving block (12) has a third engagement surface (15) and a fourth engagement surface (16) engaged with the second elastic piece (7), and a distance between the third engagement surface (15) and the rotation center of the knob (10) is larger than a distance between the fourth engagement surface (16) and the rotation center of the knob (10);

when the switch-off position is adopted, the second matching surface (14) is propped against the first elastic sheet (6), and the fourth matching surface (16) is propped against the second elastic sheet (7);

when the rotary knob is in the forward rotation position, the first matching surface (13) is propped against the first elastic piece (6), and the knob (10) is separated from the second elastic piece (7);

in the reverse position, the third matching surface (15) is propped against the second elastic sheet (7), and the knob (10) is separated from the first elastic sheet (6).

4. Direct current motor forward and reverse control switch according to claim 1 or 2, characterized in that a gear positioning structure is provided between the knob (10) and the switch body (5).

5. The direct current motor forward and reverse rotation control switch according to claim 4, wherein the gear position positioning structure includes:

a plurality of positioning grooves (17) arranged on the outer wall of the knob (10);

the elastic positioning sleeve assembly comprises a positioning sleeve (18) and an elastic piece (19), wherein the positioning sleeve (18) is suitable for propping against the positioning groove (17), one end of the elastic piece (19) is propped against the switch body (5), and the other end of the elastic piece is propped against the positioning sleeve (18).

6. The direct current motor forward and reverse rotation control switch according to claim 1, characterized in that the third terminal (3) comprises a third pin (20), a third contact plate (21) bending-connected with the third pin (20), the fourth terminal (4) comprises a fourth pin (22), and a fourth contact plate (23) bending-connected with the fourth pin (22), and the fourth contact plate (23) and the third contact plate (21) are arranged in parallel up and down.

7. The direct current motor forward and reverse rotation control switch according to claim 6, wherein the third contact plate (21) is provided with two first stationary contacts (24) corresponding to the first movable contact (8) and the second movable contact (9), and the fourth contact plate () is provided with two second stationary contacts (25) corresponding to the first movable contact (8) and the second movable contact (9).

8. The direct current motor forward and reverse rotation control switch according to claim 1, wherein one end of the first elastic piece (6) is riveted and fixed with the first terminal (1), and one end of the second elastic piece (7) is riveted and fixed with the second terminal (2).