Vacuum generating device with lockable solenoid valve

Abstract

A vacuum generating device with a lockable solenoid valve includes a mounting base, a solenoid valve, and a switching element. The mounting base includes a body and a locking block. The body has a shaft hole. The locking block protrudes radially into the shaft hole. The switching element includes a control rod disposed in the shaft hole. The control rod has a first limiting groove, a straight channel extending axially outward from the first limiting groove, and a second limiting groove connecting one end of the straight channel away from the first limiting groove. The switching element is driven to move relative to the mounting base between a first position and a second position to switch the solenoid valve. When the switching element is moved to the first position, the locking block is inserted into the first limiting groove. When the switching element is pressed and rotated to move to the second position, the locking block is inserted into the second limiting groove. By designing that the switching element can be locked in one of the two positions by the locking block, ease of use can be effectively improved.

Claims

1. A vacuum generating device with a lockable solenoid valve, comprising: a mounting base including a body and a locking block disposed on the body, the body having a control surface and a shaft hole axially communicating inward from the control surface along an axis, the locking block radially protruding into the shaft hole; a solenoid valve located at one end of the shaft hole away from the control surface, capable of switching between a first state and a second state; and a switching element including a control rod rotatable about the axis and axially movable along the axis and disposed in the shaft hole, the control rod having a first limiting groove, a straight channel connecting the first limiting groove and extending axially outward, and a second limiting groove connecting the straight channel at one end away from the first limiting groove, the second limiting groove being angularly spaced from the first limiting groove and being selectably locked by the locking block; The switch is driven to move between a first position and a second position relative to the mounting base to switch the solenoid valve. When the switch is moved to the first position, the locking block is inserted into the first limiting groove. To switch the state of the solenoid valve, the switch is pressed and rotated so that the locking block is inserted into the second limiting groove axially through the straight channel from the first limiting groove and then laterally. The switch is then moved to the second position.

2. The vacuum generating device with a lockable solenoid valve as described in claim 1 further includes an elastic member disposed between the switch and the solenoid valve, the elastic member accumulating a spring force while the switch is pressed and moves axially inward, and releasing the spring force when the switch is reversed to move the locking block relative to the straight channel from the second limiting groove to the straight channel, allowing the locking block to move axially back to the first limiting groove.

3. The vacuum generating device with a lockable solenoid valve as described in claim 1, wherein, The control surface of the base has a first mark and a second mark spaced apart from each other. The switch also includes a pointer connected to one end of the lever that extends out of the shaft hole and is located on the control surface. When the switch is moved to the first position, the pointer points to the first mark. When the switch is moved to the second position, the pointer points to the second mark.

4. The vacuum generating device with a lockable solenoid valve as described in claim 3, wherein, The switch also includes a slot located on one side of the pointer away from the control surface.

5. The vacuum generating device with a lockable solenoid valve as described in claim 1, wherein, One end of the straight channel is directly connected to the first limiting groove, and the other end is laterally connected to the second limiting groove.

6. The vacuum generating device with a lockable solenoid valve as described in claim 5, wherein, The locking block has an arc edge located at the center of one side adjacent to the axis, and a locking edge and a stop edge respectively connecting the two ends of the arc edge. The control rod has an axially extending central surface that fits into the arc edge, an inner wall surface and an outer wall surface respectively radially connecting the inner and outer ends of the central surface, a middle wall surface located between the inner wall surface and the outer wall surface and angularly spaced from the inner wall surface, a connecting surface that axially extends and connects one side of the inner wall surface and one side of the outer wall surface, a first groove surface that axially extends and connects the other side of the inner wall surface and one side of the middle wall surface, and a second groove surface that axially extends and connects the other side of the outer wall surface and the other side of the middle wall surface. When the switch is in the first position, the locking edge of the locking block abuts against the first groove surface, and the stop edge abuts against the connecting surface. When the switch is in the second position, the locking edge of the locking block abuts against the second groove surface.

7. The vacuum generating device with a lockable solenoid valve as described in claim 6, wherein, The curvature of the outer wall surface is equal to the sum of the curvatures of the inner wall surface and the middle wall surface.

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