CN209981052U

CN209981052U - Suspended contact controlled switch

Info

Publication number: CN209981052U
Application number: CN201920663221.5U
Authority: CN
Inventors: 汤炎青; 王俊青
Original assignee: Xiamen Hongfa Automotive Electronics Co Ltd
Current assignee: Xiamen Hongfa Automotive Electronics Co Ltd
Priority date: 2019-05-09
Filing date: 2019-05-09
Publication date: 2020-01-21
Anticipated expiration: 2029-05-09

Abstract

The utility model relates to a suspended contact control's switch rotates the rotation wheel that sets up through control suspended ground for act on the movable contact spring, be used for realizing the forced control of fast-moving switch, for example force the disconnection or force the closure, and can guarantee the effective reset of on-off state. Due to the suspended arrangement of the rotating wheel, the situation that the reset failure is caused due to the fact that the friction force of the rotating wheel is increased directly caused by dust is avoided; and because the radius of the rotating shaft of the rotating wheel is smaller than that of the rotating wheel, the smaller the radius of the rotating pair under the same condition is, the smaller the generated friction circle is (namely, the smaller the friction force is), the defect that the switch cannot be reset possibly caused by the fact that dust influences the sliding between the parts is avoided, and the switch can be ensured to work stably and effectively. Simultaneously, the axle sleeve is split type structure, and the dust is difficult for forming in the axle sleeve and piles up to along with the rotation of pivot, can also discharge the dust from the clearance between two arc walls, realize self-cleaning function, guarantee that the pivoted is smooth and easy.

Description

Suspended contact controlled switch

Technical Field

The utility model relates to the technical field of switches, more specifically say, relate to a suspended contact control's switch.

Background

The switch is widely applied to control circuits of various devices, and a large number of common electromechanical switches adopt a contact forced opening mechanism to mechanically push contacts to open in order to improve the opening capacity of switch contacts, so that the adhered contacts are forcibly opened by fully utilizing a larger external driving force. As shown in fig. 1 to 3, in the contact forced opening mechanism of the prior art, a pressing block 101 drives a sliding wheel 102 to slide in a sliding groove 103, and a movable contact 104 is pried open by the sliding wheel 102, so that a movable contact 105 and a fixed contact 106 are forced to be opened; when the pressing piece 101 releases the sliding wheel 102, the sliding wheel 102 is pushed in the opposite direction by the force F1 generated by the elastic return action of the movable spring 104, and the sliding wheel 102 returns to the state shown in fig. 1.

As shown in fig. 4, fine particles such as dust fall into the sliding groove 103, that is, between the sliding groove 103 and the sliding wheel 102, such as metal splashes generated during the contact opening and closing process, or debris generated by the friction of the insulating material. Because the particles are irregular in shape and have a plurality of edges or spikes at fine positions, the particles are supported between the two sliding surfaces and are difficult to roll, and further the sliding friction force F of the sliding wheel 102 sliding in the sliding groove 103 is greatly increased, when the sliding friction force F is greater than the acting force F1 generated by the elastic reset of the movable spring 104, the sliding wheel 102 cannot be pushed to reset only by the elastic reset action of the movable spring 104, so that the movable contact 105 and the fixed contact 106 are suspended and do not contact, namely the switch keeps an open state, and the hidden danger that the switch cannot be automatically reset and closed exists.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art's not enough, provide one kind and can effectively avoid piling up the switch that causes the suspended contact control of inefficacy that resets because of the dust.

The technical scheme of the utility model as follows:

the utility model provides a switch of suspension formula contact control, includes shell, movable contact spring, movable contact, stationary contact, catch bar, rotates the wheel, movable contact and stationary contact adaptation rotate the wheel and hang the ground and rotate and set up in the shell, rotate the drive end and the movable contact spring adaptation of wheel, the catch bar sets up in the control end one side of rotating the wheel, the catch bar is provided with control part, control part acts on the control end of rotating the wheel, the drive end jack-up movable contact spring of control rotation wheel.

Preferably, the rotating wheel is provided with a rotating shaft, the shell is provided with a shaft sleeve, and the rotating wheel is suspended and rotatably connected through the cooperation of the rotating shaft and the shaft sleeve.

Preferably, the rotating shaft is in clearance fit with the shaft sleeve.

Preferably, the shaft sleeve comprises two arc-shaped walls which are oppositely arranged, and a gap is formed between the two arc-shaped walls.

Preferably, the rotatable wheel is of generally semi-circular configuration, with the centre of gravity of the configuration being located below the axis of rotation.

Preferably, the control end and the driving end of the rotating wheel are convex cambered surfaces.

Preferably, the rotating shaft is arranged between the control end and the driving end, and the rotating wheels are in a symmetrical structure by taking the rotating shaft as a center.

Preferably, the radius of the rotating shaft is smaller than the radius of the rotating wheel.

Preferably, the control portion is a laterally extending projection of a side wall of the push rod.

Preferably, the projection is of triangular, hook-like, plate-like configuration towards the control end.

The utility model has the advantages as follows:

suspension type contact control's switch, rotate the rotation wheel that sets up through control suspension ground and rotate, act on the movable contact spring for realize the forced control of fast-moving switch, for example force the disconnection or force the closure, and can guarantee the effective reset of on-off state. Due to the suspended arrangement of the rotating wheel, the situation that the reset failure is caused due to the fact that the friction force of the rotating wheel is increased directly caused by dust is avoided; and because the radius of the rotating shaft of the rotating wheel is smaller than that of the rotating wheel, the smaller the radius of the rotating pair under the same condition is, the smaller the generated friction circle is (namely, the smaller the friction force is), compared with the prior art, the friction force between the rotating shaft and the shaft sleeve is reduced, the elastic reset acting force of the movable spring piece can more easily realize reset, the defect that the reset cannot be caused by the fact that dust affects the sliding between parts is avoided, namely, the stable and effective work of the switch can be ensured, and the hidden danger that the quick-acting switch cannot be effectively reset due to dust accumulation is avoided. Simultaneously, the axle sleeve is split type structure, and the dust is difficult for forming in the axle sleeve and piles up to along with the rotation of pivot, can also discharge the dust from the clearance between two arc walls, realize self-cleaning function, guarantee that the pivoted is smooth and easy.

Drawings

Fig. 1 is a schematic structural view of a contact forced opening mechanism of the prior art (initial state of contact closure);

FIG. 2 is a schematic diagram of a prior art forced disconnect configuration;

fig. 3 is a schematic view of a state of the prior art in which compound closure is performed (F1 is the elastic return force of the movable spring plate);

FIG. 4 is a schematic view showing a state in which dust is accumulated in the prior art (f is a frictional force applied to a rotating wheel);

fig. 5 is a schematic structural diagram of the initial state of the present invention;

fig. 6 is a schematic structural diagram of an intermediate state of the present invention;

FIG. 7 is a schematic structural view of the present invention in a forced-off state;

in the figure: 101 is a push rod, 102 is a sliding wheel, 103 is a sliding groove, 104 is a movable contact piece, 105 is a movable contact, 106 is a stationary contact, 20 is a push rod, 21 is a control part, 30 is a housing, 31 is a shaft sleeve, 32 is an arc-shaped wall, 40 is a rotating wheel, 41 is a control end, 42 is a driving end, 43 is a rotating shaft, 50 is a movable contact piece, 51 is a movable contact, 52 is a stationary contact, 60 is a spring, and 61 is a spring piece.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples.

The utility model discloses a solve prior art's quick-action switch because the dust is piled up and is caused the not enough that can't reset, force the disconnection back to the normally closed contact promptly, can't reset closed, force the closed back to the normally open contact, can't reset the disconnection, provide a suspended contact control's switch, rotate the rotation wheel that sets up through control suspended ground, act on the movable contact spring, a forced control for realizing quick-action switch, for example, force the disconnection or force the closure, and can guarantee the effective disconnection that resets of on-off state or the disconnection that resets.

The main components of the suspended contact controlled switch of the utility model comprise a shell 30, a movable spring leaf 50, a movable contact 51, a fixed contact 52, a push rod 20 and a rotating wheel 40; the rotating wheel 40 which is arranged in the shell 30 in a suspended rotating mode is controlled to rotate, and acts on the movable spring plate 50, so that forced control of the quick-acting switch, such as forced opening or forced closing, can be realized, and effective resetting of the switch state can be ensured. The utility model discloses in, movable contact 51 and stationary contact 52 adaptation rotate drive end 42 and the movable contact spring 50 adaptation of wheel 40, based on the synergism of rotating wheel 40, control portion 21, control movable contact spring 50 to the motion of drive movable contact spring 50, and then change movable contact 51 and stationary contact 52's state, promptly, carry out the forced disconnection with the normally closed contact, force the closure with normally open contact. Specifically, the push rod 20 is provided with a control part 21, the control part 21 acts on the control end 41 of the rotating wheel 40, and controls the driving end 42 of the rotating wheel 40 to jack up the movable spring 50.

The utility model discloses in, the unsettled and rotation setting of rotating wheel 40 is realized through pivot 43 and axle sleeve 31 cooperation, specifically, rotates wheel 40 and is provided with pivot 43, and shell 30 is provided with axle sleeve 31, through pivot 43 and axle sleeve 31 cooperation, realizes rotating wheel 40 unsettled and rotate to be connected. In this embodiment, the rotating wheel 40 is positioned and installed with the sleeve 31 only through the rotating shaft 43, and is suspended in the inner space of the housing 30, so that the surfaces of the rotating wheel 40 are not in contact with the housing 30, i.e., friction is not formed. On the other hand, because rotate wheel 40 and be unsettled setting, the dust under the normal use environment is piled up, can not pile up and rotate the height that wheel 40 contacted or submerged in the in-service use, therefore the utility model discloses a structure can avoid the snap switch completely under the condition that still can normally work, because the piling up of dust and the rotation wheel 40 that causes only relies on movable reed 50's elasticity effort of resetting and the not enough that can't normally reset.

As shown in fig. 5, 6, and 7, in the present embodiment, two pairs of normally closed contacts and two pairs of normally open contacts are provided, and are symmetrically provided on both sides of the push rod 20, respectively, and can perform synchronous linkage. Wherein, the rotating wheel 40 is arranged corresponding to the normally closed contact and is used for driving the movable reed 50 of one of the normally closed contacts so as to realize the change of the working state of the whole switch. Specifically, the embodiment further includes a spring plate 61 and a spring 60, where the spring plate 61 is used to support the push rod 20 to ensure stability of the movement process of the push rod 20, and the spring plate 61 and the spring 60 simultaneously reset the push rod 20 upwards. In this embodiment, the control portion 21 is a protrusion extending transversely from the side wall of the push rod 20, and the protrusion is a triangular, hook-shaped, plate-shaped structure facing the control end.

The utility model discloses in, between wheel 40 and the shell 30 rotates, realize through pivot 43 and axle sleeve 31's cooperation, pivot 43 sets up in axle sleeve 31 promptly. In order to reduce the mutual friction between the rotating shaft 43 and the shaft sleeve 31, the pushing rod 20 or the movable spring plate 50 can push the rotating wheel 40 to rotate more easily, in this embodiment, the rotating shaft 43 is in clearance fit with the shaft sleeve 31, and then the rotating shaft 43 is not in close fit with the shaft sleeve 31, the contact area between the rotating shaft 43 and the shaft sleeve 31 is small, and further the mutual friction can be greatly reduced.

Due to the consideration of process simplification and cost optimization, during specific production, the matching structure between the rotating shaft 43 and the rotating shaft 43 is not usually implemented to realize sealing connection, so that dust inevitably enters the rotating shaft 43, friction is formed on the rotating shaft 43, and the friction force applied to the rotating shaft 43 in the rotating process is increased. In order to achieve the most reliable possible operational stability, even if the dust effect is limited here, the bushing 31 comprises two opposite arcuate walls 32, which form a gap between the two arcuate walls 32, whereby a chamber for the mounting of the spindle 43 is enclosed by the two arcuate walls 32. On one hand, the clearance between the arc-shaped walls 32 makes the dust difficult to form and pile up, and on the other hand, for inevitable dust, in work, the rotation of the rotating shaft 43 can drive the dust to move, and when the dust is pushed to the position of the clearance along with the rotation of the rotating shaft 43, the dust falls out from the clearance, so that a self-cleaning effect is formed.

The operation principle of the present embodiment can be roughly divided into a forced disconnection phase and an automatic reset phase.

In the forced disconnection stage, the push rod 20 moves downward, the control part 21 follows the movement of the push rod 20 and acts on the control end 41 of the rotating wheel 40, the control end 41 moves downward, and at the same time, the driving end 42 moves upward, and the movable spring 50 is pried.

In the automatic resetting stage, the push rod 20 moves upwards, the control part 21 moves along with the movement of the push rod 20 and is far away from the control end 41 of the rotating wheel 40, under the elastic resetting acting force of the movable spring piece 50, the driving end 42 moves downwards, meanwhile, the control end 41 moves upwards, the movable spring piece 50 resets, the rotating wheel 40 resets, and the push rod 20 resets. In order to make the return of the rotating wheel 40 faster and easier, in the present embodiment, the rotating wheel 40 has a substantially semicircular structure, and the center of gravity of the structure is located below the rotating shaft 43. The downward rotation tendency can be formed under the self-weight of the rotating wheel 40. That is, when the driving end 42 of the rotary wheel 40 is moved upward, the center of gravity of the rotary wheel 40 is moved upward to an eccentric position, thereby forming a downward movement tendency. In the resetting process, the elastic resetting acting force of the movable spring leaf 50 and the self weight of the rotating wheel 40 form a resultant force for resetting the rotating wheel 40, which is more beneficial to the effective resetting of the rotating wheel 40, i.e. further ensures the effective resetting of the movable contact.

In this embodiment, the control end 41 and the driving end 42 of the rotating wheel 40 are convex cambered surfaces, so that on one hand, the rotation of the rotating wheel 40 is smoother in the process of pushing and pressing the control end 41 and the driving end 42 against the control part 21 and the movable spring piece 50, and on the other hand, the pushing of the control end 41 and the driving end 42 against the control part 21 and the movable spring piece 50 is earlier, and the pushing rod 20 can realize pushing with a longer stroke by a shorter stroke.

In order to balance the strokes of the control end 41 and the driving end 42, so that the movement distance of the pushing rod 20 can be effectively converted into the deformation distance of the movable spring 50, in this embodiment, the rotating wheel 40 is in a bilateral symmetry structure, that is, the rotating shaft 43 is disposed between the control end 41 and the driving end 42, the rotating wheel 40 is in a symmetry structure with the rotating shaft 43 as the center, and further the control end 41 and the driving end 42 can perform rotational displacement at the same speed.

Since the smaller the radius of the revolute pair is, the smaller the friction circle generated (i.e., the smaller the friction force is), under the same conditions, the radius of the rotary shaft 43 is smaller than that of the rotary wheel 40 in the present embodiment. Compared with the prior art, the friction between the rotating shaft 43 and the shaft sleeve 31 is reduced, the elastic reset acting force of the movable spring piece can be reset more easily, the defect that the switch cannot be reset due to the fact that dust influences sliding between parts is avoided, the switch can be guaranteed to work stably and effectively, and the hidden danger that the quick-acting switch cannot be reset due to accumulation of dust is avoided.

The above embodiments are merely illustrative, and not restrictive, of the present invention. Changes, modifications, etc. to the above-described embodiments are intended to fall within the scope of the claims of the present invention, as long as they are in accordance with the technical spirit of the present invention.

Claims

1. The utility model provides a switch of suspension type contact control, its characterized in that, includes shell, movable contact spring, movable contact, stationary contact, catch bar, rotates the wheel, movable contact and stationary contact adaptation rotate to set up in the shell in suspension, rotate the drive end and the movable contact spring adaptation of wheel, the catch bar sets up in the control end one side of rotating the wheel, the catch bar is provided with the control part, the control part acts on the control end of rotating the wheel, the drive end jack-up movable contact spring of wheel is rotated in the control.

2. The suspended contact controlled switch of claim 1, wherein the rotating wheel is provided with a rotating shaft, the housing is provided with a shaft sleeve, and the rotating wheel is suspended and rotatably connected by the cooperation of the rotating shaft and the shaft sleeve.

3. The suspended contact controlled switch of claim 2, wherein the shaft is clearance fit with the bushing.

4. The suspended contact controlled switch of claim 3, wherein the bushing includes two opposing arcuate walls defining a gap therebetween.

5. The suspended contact controlled switch of any one of claims 1 to 4, wherein the rotatable wheel is of generally semi-circular configuration with a center of gravity located below the axis of rotation.

6. The suspended contact controlled switch of claim 5, wherein the control end and the drive end of the rotator are convex arcs.

7. The suspended contact controlled switch of claim 6, wherein the shaft is disposed between the control end and the driving end, and the rotating wheels are symmetrical about the shaft.

8. The suspended contact controlled switch of claim 5, wherein the radius of the rotating shaft is less than the radius of the rotating wheel.

9. The suspended contact controlled switch of claim 1, wherein the control portion is a laterally extending projection of a side wall of the push rod.

10. The suspended contact controlled switch of claim 8, wherein the projection is a triangular, hook-like, plate-like structure toward the control end.