Push rod reset structure of explosion-proof knob switch

Abstract

The utility model discloses a push rod reset structure of an explosion-proof knob switch, which comprises a switch shell, two push rods are arranged in the switch shell in an up-down sliding manner, and a knob assembly for driving the push rods to slide downwards is rotationally arranged at the upper end of the switch shell; a pair of partition plates is arranged on the inner side wall of the switch shell in a spaced mode, the two push rods are arranged on the two sides of the switch shell in a separated mode through the partition plates, and reset springs are arranged on the lower end faces of the two push rods. The knob assembly comprises a knob body and a pressing head, the knob body drives the pressing head to move back and forth between the two push rods, one corresponding push rod is pressed to slide downwards to compress the reset spring, and the other push rod is driven by the corresponding reset spring to reset. The partition plate avoids mutual friction of the two push rods and solves the problem of interference of the two push rods; the two push rods are independently provided with the reset springs, namely, when the reset springs drive the corresponding push rods to slide upwards, downward sliding of the push rods cannot be affected, and jamming is avoided; and the operation of the explosion-proof knob switch is smoother.

Description

Technical Field

[0001] The utility model relates to the technical field of explosion-proof switches, and more particularly to a push rod reset structure of an explosion-proof knob switch. Background Art

[0002] Explosion-proof switches are primarily used in machinery and equipment in manufacturing plants and system power supply applications where explosive gases or explosive dusts may exist, especially in external electrical equipment such as motors, pumps, and lighting equipment; in process control devices used in hazardous factories and plants; or in explosive environments with flammable gases, steam, mist gases, or combustible dusts.

[0003] The explosion-proof knob switch rotates the handle to drive the left and right push rods to move up and down repeatedly, pressing the sliding shaft inside the explosion-proof switch movement to move back and forth, thereby energizing and de-energizing the contacts inside the movement, thereby realizing control of the power state of the connected circuit.

[0004] However, the left push rod and the right push rod of the existing explosion-proof knob switch are directly set close to each other and share a return spring, so that when the left push rod and the right push rod move relative to each other, the friction between the two will prevent each other from moving, resulting in mutual interference; and the return spring will directly prevent the side from moving downward; causing the left push rod and the right push rod to tilt to one side, resulting in the left push rod and the right push rod not being able to return to their original position, or even causing a jam. Utility Model Content

[0005] In view of the deficiencies in the prior art, the present invention aims to provide a push rod reset structure for an explosion-proof knob switch.

[0006] A push rod reset structure for an explosion-proof rotary switch includes a switch housing, two push rods are provided in the switch housing for sliding up and down, and a knob assembly is provided on the upper end of the switch housing for driving the push rods to slide downward;

[0007] A pair of partitions are provided on the inner side wall of the switch housing, the partitions separating the two push rods and arranged on both sides of the switch housing, and the lower end surfaces of the two push rods are provided with return springs;

[0008] The knob assembly includes a knob body and a pressing head. The knob body drives the pressing head to move back and forth between the two push rods, pressing a corresponding push rod to slide downward to compress the reset spring, while the other push rod is reset under the drive of the corresponding reset spring.

[0009] The utility model is further configured as follows: two return springs are provided on the lower end surface of the push rod, wherein the two return springs are respectively placed at the front and rear ends of the lower end surface of the push rod.

[0010] The utility model is further configured as follows: the front and rear ends of the push rod are both provided with a card slot, and the switch housing is provided with four insertion columns;

[0011] The lower end of the return spring is inserted on the corresponding insertion column, and the upper end is placed in the corresponding slot.

[0012] The utility model is further provided with: two guide posts are spaced apart in the switch housing; the push rod is provided with guide grooves adapted to the guide posts; the push rod slides up and down under the guidance of the guide posts.

[0013] The utility model is further provided with: the guide groove is U-shaped.

[0014] The utility model is further provided with: a push rod is connected to the lower end of the knob body, the pressing head is arranged on the outer side wall of the push rod, and a pressing surface that matches the pressing head is inclined on the inner side wall of the push rod;

[0015] The pressing head slides along the pressing surface, driving the push rod to slide downward.

[0016] The utility model is further provided with: a positioning groove is provided on the lower end portion of the pressing head, and a positioning protrusion adapted to the positioning groove is provided on the upper end portion of the pressing surface.

[0017] The utility model is further provided with: the lower end of the switch housing is mounted with an organic core through a connector, the outer side wall of the lower end of the switch housing is provided with an annular groove, the upper end of the connector is provided with an installation cavity adapted to the lower end of the switch housing, and the side wall of the upper end of the connector is provided with at least two latching teeth adapted to the annular groove at intervals;

[0018] The connecting body is sleeved on the lower end of the switch housing, and the latch teeth cooperate with the annular groove so that the connecting body is rotatably arranged on the lower end of the switch housing.

[0019] The utility model is further provided with: a plurality of top screw holes are opened on the side wall of the upper end of the connector, wherein the top screws pass through the top screw holes and abut against the outer side wall of the switch housing to fix the connector on the switch housing.

[0020] The utility model is further provided with: the number of the top screw holes is two, wherein the two top screw holes are arranged on the connector at intervals.

[0021] The beneficial effects of the present invention are as follows: the two push rods of the explosion-proof knob switch of the present invention are separated on both sides by two partitions of the switch housing, so that when the knob body is rotated to drive the top rod to push one push rod to slide downward, the other push rod slides upward under the drive of the reset spring, that is, during the reverse sliding process of the two push rods, the partition avoids mutual friction between the two push rods, and solves the interference problem during the sliding process of the two push rods; ensures that the push rod sliding upward can be reset to its position and correctly control the power supply status of the equipment; in addition, reset springs are separately provided at the lower ends of the two push rods, that is, the reset springs operate independently in the process of driving the corresponding push rod to slide upward, and will not affect the push rod sliding downward, avoiding the occurrence of jamming; making the operation of the explosion-proof knob switch smoother and more labor-saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a structural diagram of a push rod reset structure of an explosion-proof knob switch of the utility model;

[0023] Figure 2 This is an exploded view of the push rod reset structure of an explosion-proof knob switch of the utility model;

[0024] Figure 3 This is a diagram of the installation of a push rod of an explosion-proof push button switch in a switch housing of the utility model;

[0025] Figure 4 This is a structural diagram of a push rod of an explosion-proof push button switch of the utility model;

[0026] Figure 5 This is a schematic diagram of the structure of the switch housing of an explosion-proof push button switch of the utility model. Figure 1 ;

[0027] Figure 6 This is a schematic diagram of the structure of the switch housing of an explosion-proof push button switch of the utility model. Figure 2 ;

[0028] Figure 7 This is a schematic structural diagram of a switch housing of an explosion-proof push button switch of the utility model;

[0029] Explanation of the accompanying reference numerals: 1. Switch housing; 11. Partition; 12. Insert column; 13. Guide column; 14. Annular groove; 2. Push rod; 21. Return spring; 22. Slot; 23. Guide groove; 24. Pressing surface; 25. Positioning protrusion; 3. Knob assembly; 31. Knob body; 32. Push rod; 321. Pressing head; 3211. Positioning groove; 4. Connector; 41. Tooth; 42. Top screw hole; 5. Movement. DETAILED DESCRIPTION

[0030] Refer to the attached Figures 1 to 7The utility model is further described in detail with an embodiment of a push rod reset structure of an explosion-proof knob switch.

[0031] A push rod reset structure for an explosion-proof rotary switch includes a switch housing 1, wherein two push rods 2 are provided in the switch housing 1 for sliding up and down, and a knob assembly 3 is provided on the upper end of the switch housing 1 for driving the push rods 2 to slide downward;

[0032] A pair of partitions 11 are provided on the inner side wall of the switch housing 1. The partitions 11 separate the two push rods 2 and are provided on both sides of the switch housing 1. The lower end surfaces of the two push rods 2 are provided with return springs 21.

[0033] The knob assembly 3 includes a knob body 31 and a pressing head 321. The knob body 31 drives the pressing head 321 to move back and forth between the two push rods 2, pressing the corresponding push rod 2 to slide downward and compress the return spring 21, while the other push rod 2 is reset under the drive of the corresponding return spring 21.

[0034] The two push rods 2 of the explosion-proof knob switch are separated on both sides by two partitions 11 of the switch housing 1, so that when the knob body 31 is rotated to drive the top rod 32 to push one push rod 2 to slide downward, the other push rod 2 slides upward under the drive of the return spring 21, that is, during the reverse sliding process of the two push rods 2, the partition 11 avoids mutual friction between the two push rods 2, and solves the interference problem during the sliding process of the two push rods 2; ensures that the push rod 2 sliding upward can be reset to its position and correctly control the power supply status of the equipment; in addition, a return spring 21 is separately provided at the lower end of the two push rods 2, that is, the return spring 21 operates independently in the process of driving the corresponding push rod 2 to slide upward, and does not affect the push rod 2 sliding downward, avoiding the occurrence of jamming; making the operation of the explosion-proof knob switch smoother and more labor-saving.

[0035] The lower end surface of the push rod 2 is provided with two return springs 21, wherein the two return springs 21 are respectively placed at the front and rear ends of the lower end surface of the push rod 2; two return springs 21 are set under each push rod 2 to ensure that the push rod 2 can slide upward and return to its position, and at the same time, the two return springs 21 are respectively set at the front and rear ends of the lower end surface of the push rod 2, so that the front and rear ends of the push rod 2 are subjected to balanced force to avoid tilting, so that the push rod 2 can slide vertically during the upward sliding process to avoid jamming.

[0036] The front and rear ends of the push rod 2 are both provided with card slots 22, and four insertion columns 12 are provided in the switch housing 1; the lower end of the reset spring 21 is inserted on the corresponding insertion column 12, and the upper end is placed in the corresponding card slot 22, so that the reset spring 21 is stably placed under the push rod 2, thereby improving the structural stability of the explosion-proof knob switch.

[0037] Two guide columns 13 are provided in the switch housing 1 at intervals, and a guide groove 23 adapted to the guide column 13 is provided on the push rod 2. The guide groove 23 is U-shaped. The push rod 2 slides up and down under the guidance of the guide column 13, so that the push rod 2 can slide vertically in the switch housing 1, thereby ensuring that the knob switch operates more smoothly and stably.

[0038] A pressing head 321 is provided on the outer side wall of the push rod 32, and a pressing surface 24 that cooperates with the pressing head 321 is provided on the inner side wall of the push rod 2; the pressing head 321 slides along the pressing surface 24, driving the push rod 2 to slide downward.

[0039] The lower end of the clamping head 321 is provided with a positioning groove 3211, and the upper end of the clamping surface 24 is provided with a positioning protrusion 25 that is adapted to the positioning groove 3211; the positioning groove 3211 cooperates with the positioning protrusion 25 to stabilize the push rod 2 in the pressed position, thereby avoiding the automatic switching state of the explosion-proof switch; the lower ends of the two adjacent clamping surfaces 24 are provided with a matching portion that is adapted to the positioning groove 3211, and when the clamping head 321 slides to the matching portion, the positioning groove 3211 cooperates with the two matching portions at the same time, and the two push rods 2 return to their positions at the same time under the action of the corresponding return springs 21, and return to the initial state.

[0040] The lower end of the switch housing 1 is mounted with an organic core 5 via a connector 4. An annular groove 14 is provided on the outer side wall of the lower end of the switch housing 1. An installation cavity adapted to the lower end of the switch housing 1 is provided on the upper end of the connector 4. At least two latching teeth 41 adapted to the annular groove 14 are provided on the side wall of the upper end of the connector 4.

[0041] When assembling the explosion-proof knob switch, the connector 4 is sleeved on the lower end of the switch housing 1, and the latch teeth 41 cooperate with the annular groove 14, so that the connector 4 is rotated and arranged on the lower end of the switch housing 1;

[0042] The movement 5 on the explosion-proof knob switch can be rotated relative to the switch housing 1, so that the direction of the movement 5 can be adjusted; the movement 5 on the explosion-proof knob switch is prevented from interfering with the installation of the equipment; when adjusting the direction of the movement 5, it is only necessary to rotate the connector 4 by hand, and the adjustment operation is convenient and simple; at the same time, the latch 41 will abut against the bottom wall of the annular groove 14, thereby positioning the movement 5.

[0043] Two top screw holes 42 are provided on the side wall of the upper end of the connector 4, wherein the two top screw holes 42 are arranged at intervals on the connector 4; wherein the top screw passes through the top screw hole 42 and rests against the outer wall of the switch housing 1 to fix the connector 4 on the switch housing 1; that is, after the installation is completed, the connector 4 can be further fixed by passing the top screw through the top screw hole 42 to limit the rotation of the connector 4 relative to the switch housing 1, so that the structural stability of the explosion-proof push button switch is better.

[0044] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiment. All technical solutions based on the concept of the present invention are within the scope of protection of the present invention. It should be noted that for those skilled in the art, certain improvements and modifications that do not depart from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A push rod reset structure for an explosion-proof knob switch, characterized by: The switch housing comprises a switch housing in which two push rods are slidably mounted up and down, and a knob assembly is rotatably mounted on the upper end of the switch housing to drive the push rods to slide downward. A pair of partitions are provided on the inner side wall of the switch housing, the partitions separating the two push rods and arranged on both sides of the switch housing, and the lower end surfaces of the two push rods are provided with return springs; The knob assembly includes a knob body and a pressing head. The knob body drives the pressing head to move back and forth between the two push rods, pressing a corresponding push rod to slide downward to compress the reset spring, while the other push rod is reset under the drive of the corresponding reset spring.

2. The push rod reset structure of an explosion-proof knob switch according to claim 1, characterized in that: The lower end surface of the push rod is provided with two return springs, wherein the two return springs are respectively placed at the front and rear ends of the lower end surface of the push rod.

3. The push rod reset structure of an explosion-proof knob switch according to claim 2, characterized in that: The front and rear ends of the push rod are both provided with slots, and the switch housing is provided with four insertion columns; The lower end of the return spring is inserted on the corresponding insertion column, and the upper end is placed in the corresponding slot.

4. The push rod reset structure of an explosion-proof knob switch according to claim 1, 2 or 3, characterized in that: Two guide columns are arranged at intervals in the switch housing, and the push rod is provided with guide grooves adapted to the guide columns. The push rod slides up and down under the guidance of the guide columns.

5. The push rod reset structure of an explosion-proof knob switch according to claim 4, characterized in that: The guide groove is U-shaped.

6. The push rod reset structure of an explosion-proof knob switch according to claim 1, 2 or 3, characterized in that: The lower end of the knob body is connected to a push rod, the clamping head is arranged on the outer wall of the push rod, and the inner wall of the push rod is inclinedly provided with a clamping surface that matches the clamping head; the clamping head slides along the clamping surface to drive the push rod to slide downward.

7. The push rod reset structure of an explosion-proof knob switch according to claim 6, characterized in that: A positioning groove is provided on the lower end of the pressing head, and a positioning protrusion matched with the positioning groove is provided on the upper end of the pressing surface.

8. The push rod reset structure of an explosion-proof knob switch according to claim 1, 2 or 3, characterized in that: The lower end of the switch housing is provided with an organic core through a connector. The outer side wall of the lower end of the switch housing is provided with an annular groove. The upper end of the connector is provided with an installation cavity adapted to the lower end of the switch housing. The side wall of the upper end of the connector is provided with at least two latches adapted to the annular groove at intervals. The connecting body is sleeved on the lower end of the switch housing, and the latch teeth cooperate with the annular groove so that the connecting body is rotatably arranged on the lower end of the switch housing.

9. The push rod reset structure of an explosion-proof knob switch according to claim 8, characterized in that: A plurality of top screw holes are provided on the side wall of the upper end of the connector, wherein the top screws pass through the top screw holes and abut against the outer side wall of the switch housing to fix the connector on the switch housing.

10. The push rod reset structure of an explosion-proof knob switch according to claim 9, characterized in that: The number of the top screw holes is two, wherein the two top screw holes are arranged on the connector at intervals.

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