CN203218147U

CN203218147U - Electric switch

Info

Publication number: CN203218147U
Application number: CN 201320165462
Authority: CN
Inventors: 陆亚洲; 苏康
Original assignee: Zhangjiagang Huajie Electronics Co Ltd
Current assignee: Zhangjiagang Huajie Electronics Co Ltd
Priority date: 2013-04-03
Filing date: 2013-04-03
Publication date: 2013-09-25
Anticipated expiration: 2023-04-03

Abstract

The utility model discloses an electric switch which is flexible and normal in on and off. The electric switch comprises a base, fixed contacts, an upper shell and a button. The fixed contacts are disposed in the shell. The button is hinged to the outer side of the upper shell which is matched with the base. The button is connected with the upper shell through a main spring. A push rod is slidably disposed in the upper shell. An auxiliary spring is disposed between the push rod and the inner wall of the upper shell. One end of the button penetrates the upper shell to be hinged to one end of the push rod. A slider is disposed between the push rod and the base. Movable contacts matched with the fixed contacts are arranged on the slider. An omega-shaped elastic piece is fixed on the inner wall of the upper shell and located between the push rod and the slider. One side, facing the elastic piece, of the slider is provided with lugs matched with two bending parts at two ends of the elastic piece. The slider is fixed on the push rod. The electric switch has the advantages that clamping force of the elastic piece is utilized to allow the push rod to be in an on or off state rapidly, and the electric switch is fast in action.

Description

Motor switch

Technical field

The utility model relates to a kind of motor switch.

Background technology

Existing motor switch, comprise rotation actuator button, the pull bar that links to each other with button, spring between cylinder lever connecting rod and driven the slide block, driven slide block, the movable contact assembly that the actuator slide block drives, the stationary contact assembly of colliding and connecting with the movable contact assembly, and the upper casing of the fixing above-mentioned spare part of assembling, pedestal and make the spring of rotation actuator push-button reset and other.

Mechanical motion principle: when firmly pressing rotation actuator button, button is by driving the pull bar rectilinear motion with the fixing fulcrum rotation of shell, spring between cylinder lever connecting rod and driven the slide block is pulled and is compressed, when the compression spring is pulled to line above pull bar and slider support spring, the compression spring just drives the slide block upset, the movable contact assembly that links to each other with slide block and the tactile assembly that is fixed on the pedestal are collided, realize that switch communicates.

When disappearing by the power on the rotation actuator button of being pressed in, under the effect of rotation actuator push-button reset spring, push-button reset, driving pull bar resets as straight line, driving cylinder lever connecting rod is pulled also compressed with spring between driven the slide block, when the compression spring is pulled to line above pull bar and slider support spring, the compression spring just drives the slide block upset, thereby the movable contact assembly that links to each other with slide block is resetted, the movable contact assembly that links to each other with slide block separates with the stationary contact assembly that is fixed on the pedestal, realizes that switch is disconnected mutually.

The switch of said structure can produce following problem in use: when reality is used, spring between cylinder lever connecting rod and driven the slide block, when being pulled the compression upset, often disperse to realize upset because of the deformation force value of spring, cause to drive the slide block upset, thereby the movable contact assembly that links to each other with slide block and the tactile assembly that is fixed on the pedestal can't be collided or disconnect, thereby influence the on-off function of switch.

The utility model content

Technical problem to be solved in the utility model is: provide a kind of break-make flexible, normal motor switch.

For solving the problems of the technologies described above, the technical solution adopted in the utility model is: a kind of motor switch, comprise pedestal, be arranged on the fixed contact in the pedestal, the upper casing that matches with pedestal and be arranged on the upper casing outside and the button hinged with upper casing, button is hinged with upper casing and link to each other by main spring between the two, slide in the described upper casing and be provided with push rod, be provided with auxiliary spring between push rod and the upper casing inwall, one end of button passes behind the upper casing hinged with an end of push rod, be provided with slide block between push rod and the pedestal, slide block is provided with the moving contact that matches with fixed contact, the shell fragment that Ω shape is fixedly arranged on the upper casing inwall, shell fragment is between push rod and slide block, that side that slide block is positioned at shell fragment is provided with the projection that matches with shell fragment two ends bending part, and slide block is fixed on the push rod.

Described button is provided with pin-and-hole, is provided with the bearing pin that matches with pin-and-hole by spring on the upper casing, and an end of bearing pin stretches out upper casing, and when button was pressed extreme position, the other end of bearing pin can stretch in the pin-and-hole of button.

Described fixed contact and moving contact are four, in the pedestal four conductors are arranged fixedly, and fixed contact is separately fixed on the conductor; Slide block is provided with two sheet metals, and per two moving contacts are fixed on the sheet metal.

Be arranged with sealing ring on the described push rod, sealing ring is fixed between upper casing and the pedestal.

Pin-and-hole on the described button is the mounting hole with radian, and the aperture of mounting hole is greater than the diameter of bearing pin.

The beneficial effects of the utility model are: utilize the clamping force of shell fragment, make push rod can be in the state that opens or closes fast, be swift in motion, fast.

Description of drawings

Fig. 1 is the outside drawing of the utility model motor switch;

Fig. 2 is the exploded view of Fig. 1;

Fig. 3 is the partial sectional view when not pressing button among Fig. 1;

Fig. 4 is the structure chart when projection is positioned at two shell fragment legs centre among Fig. 3;

Fig. 5 is the structure chart when projection is positioned at two shell fragment leg right sides among Fig. 1.

Among the figure: 1, pedestal, 2, conductor, 3, fixed contact, 4, upper casing, 5, button, 6, main spring, 7, push rod, 8, slide block, 9, sheet metal, 10, moving contact, 11, little spring, 12, shell fragment, 13, the shell fragment leg, 14, auxiliary spring, 15, projection, 16, pin-and-hole, 17, spring, 18, bearing pin, 19, sealing ring.

Embodiment

Below in conjunction with accompanying drawing, describe specific embodiments of the present utility model in detail.

As Fig. 1, shown in Figure 2, motor switch described in the utility model, comprise pedestal 1, be arranged on four conductors 2 in the pedestal 1, be respectively arranged with fixed contact 3 on each conductor 2, pedestal 1 is provided with the upper casing 4 that is mated, the arranged outside of upper casing 4 has button 5, button 5 is hinged with upper casing 4, link to each other by main spring 6 between button 5 and the upper casing 4, sliding in the described upper casing 4 is provided with push rod 7, because in motor switch, the elastic force of main spring 6 is not too large, need other secondary spring to guarantee resetting of button 5, therefore between push rod 7 and upper casing 4 inwalls, be provided with auxiliary spring 14, be used for improving the reset capability of button 5.It is hinged with an end of push rod 7 that one end of button 5 passes upper casing 4 backs, be provided with slide block 8 between push rod 7 and the pedestal 1, slide block 8 is provided with two sheet metals 9, be respectively arranged with two moving contacts 10 on the sheet metal 9, moving contact 10 is fixed on the sheet metal 9 by little spring 11, have four moving contacts 10 altogether, after slide block 8 slided, moving contact 10 can contact with corresponding fixed contact 3.The shell fragment 12 that Ω shape is fixedly arranged on upper casing 4 inwalls, the bending part at the two ends of shell fragment 12 is shell fragment leg 13, shell fragment 12 is between push rod 7 and slide block 8, that side that slide block 8 is positioned at shell fragment 12 is provided with the projection 15 that matches with shell fragment leg 13---Fig. 3, Fig. 4, shown in Figure 5, and slide block 8 is fixed on the push rod 7.In order to guarantee that button 5 depresses to behind the extreme position and to remain on extreme position motionless, thereby for the operator provides convenience, need not pin button 5 always, be about to button 5 location, described button 5 is provided with pin-and-hole 16, is provided with the bearing pin 18 that matches with pin-and-hole 16 by spring 17 on the upper casing 4, and an end of bearing pin 18 stretches out upper casing 4, when button 5 was pressed extreme position, the other end of bearing pin 18 can stretch in the pin-and-hole 16 of button 5.The operator can unclamp hand then, and button 5 resets under the effect of main spring 6 and auxiliary spring 14, but because bearing pin 18 snaps in the pin-and-hole 16, makes button 5 to reset, thereby guarantees that button 5 is in by being pressed in the extreme position state.In actual production, for the ease of the cooperation of bearing pin 18 and pin-and-hole 16, the pin-and-hole 16 on the button 5 is for having the mounting hole of radian, and the aperture of mounting hole is greater than the diameter of bearing pin 18.For anti-throw-out lever 7 dust in mobile process enters in the motor switch, sheathed sealing ring 19 on described push rod 7, sealing ring 19 is fixed between upper casing 4 and the pedestal 1.

The course of work of the utility model electric tool switch is: as shown in Figure 3, when electric tool switch was not worked, the projection 15 on the slide block 8 was positioned at the left side of shell fragment leg 13 on the shell fragment 12.As shown in Figure 2, when button 5 left ends downwards on time, button 5 rotates counterclockwise around the hinged place of itself and upper casing 4, the right-hand member of button 5 just spurs push rod 7 and moves right, and owing to slide block 8 is fixed on the push rod 7, so slide block 8 also moves right, as shown in Figure 4, projection 15 on the slide block 8 passes through between two shell fragment legs 13 by force, and the distance between the two shell fragment legs 13 is widened, and shell fragment 12 produces certain elastic force.Main spring 6 and auxiliary spring 14 all are in a compressive state at this moment.After in case the projection 15 on the slide block 8 moves to two shell fragment legs, 13 right sides---as shown in Figure 5, elastic force between the two shell fragment legs 13 of shell fragment 12 pushes projection 15 immediately, be that slide block 8 drive push rods 7 have an action that moves right fast, moving contact 10 on this rear slider 8 is immediately with fixed contact 3 contacts, and contact is good, and electric tool is started working, at this moment, can button 5 be fixed by lower bearing pin 18, make electric tool keep operating state.When not needing work, extract bearing pin 18, button 5 and push rod 7 reset under the effect of main spring 6 and auxiliary spring 14, and slide block 8 also resets thereupon, and moving contact 10 and fixed contact 3 separate, and circuit disconnects.In the above-mentioned course of work, utilize shell fragment 12 with the combination of projection 15, can be so that slide block 8 can be with the conversion between two positions of rapid movement mode.The utility model has the advantages that: significantly avoided switch from open position to the on-position process, the vibrations of contact make the contact connect rapidly, have reduced the infringement to the contact, compare with the switch contact in past, have prolonged the life-span of switch.In the application of alternating-current switch, significantly improved contact endurance, the contact disconnects rapidly, and electric arc extinguishes immediately.

Claims

1. motor switch, comprise pedestal, be arranged on the fixed contact in the pedestal, the upper casing that matches with pedestal and be arranged on the upper casing outside and the button hinged with upper casing, button is hinged with upper casing and link to each other by main spring between the two, it is characterized in that: sliding in the described upper casing is provided with push rod, be provided with auxiliary spring between push rod and the upper casing inwall, one end of button passes behind the upper casing hinged with an end of push rod, be provided with slide block between push rod and the pedestal, slide block is provided with the moving contact that matches with fixed contact, the shell fragment that Ω shape is fixedly arranged on the upper casing inwall, shell fragment is between push rod and slide block, that side that slide block is positioned at shell fragment is provided with the projection that matches with shell fragment two ends bending part, and slide block is fixed on the push rod.

2. motor switch according to claim 1, it is characterized in that: described button is provided with pin-and-hole, is provided with the bearing pin that matches with pin-and-hole by spring on the upper casing, and an end of bearing pin stretches out upper casing, when button was pressed extreme position, the other end of bearing pin can stretch in the pin-and-hole of button.

3. motor switch according to claim 1, it is characterized in that: described fixed contact and moving contact are four, in the pedestal four conductors are arranged fixedly, and fixed contact is separately fixed on the conductor; Slide block is provided with two sheet metals, and per two moving contacts are fixed on the sheet metal.

4. motor switch according to claim 1, it is characterized in that: be arranged with sealing ring on the described push rod, sealing ring is fixed between upper casing and the pedestal.

5. motor switch according to claim 1, it is characterized in that: the pin-and-hole on the described button is the mounting hole with radian, and the aperture of mounting hole is greater than the diameter of bearing pin.