CN201464951U

CN201464951U - Knob switch

Info

Publication number: CN201464951U
Application number: CN2009201167482U
Authority: CN
Inventors: 祝杭军
Original assignee: HUZHOU LIMES ELECTRONICS TECHNOLOGY Co Ltd
Current assignee: HUZHOU LIMES ELECTRONICS TECHNOLOGY Co Ltd
Priority date: 2009-03-28
Filing date: 2009-03-28
Publication date: 2010-05-12
Anticipated expiration: 2019-03-28

Abstract

The utility model relates to a knob switch comprising a knob and a switch body. The switch body comprises a switch shaft; the knob is mounted at the shaft end of the switch shaft by a limit device; the knob and the limit device are sleeved by a cylinder; the limit device is fixed on the outer shell of the switch body and provided with a notch and latches; the knob is provided with a clamping hook connected with the notch and a clamping sheet matched with a latch; the clamping hook and the clamping sheet are staggered and distributed on the cylindrical side wall of the knob; the notch and the latches are staggered and distributed on the cylindrical side wall of the limit device; and the circumference length of the clamping sheet is smaller than the circumference length between the two latches. By adopting the limit device in simple structure for connecting the switch shaft and the knob, the utility model can prevent the switch shaft or the knob from being twisted off when an operator unconsciously forcefully twists the knob and has the advantages of simple structure, reliable connection and high safety performance.

Description

Rotary switch

Technical field

The utility model relates to a kind of rotatable shifting switch, particularly relates to a kind of rotary switch.

Background technology

Existing shifting switch, include grade speed-regulating switch and stepless speed regulation switch, the people selects the gear of needs by the knob on the rotary switch, its structure is often installed a knob at the axle head of switch shaft and is improved moment of torsion, reduce the dynamics of rotation, be convenient for people to operate, wherein knob is provided with an axis hole that matches with switch shaft, switch shaft is all cut sub-fraction by an identical xsect in the axial direction with axis hole, this moment, knob and switch shaft just can not do relative motion in a circumferential direction, for making knob be not easy to come off from the axle head of switch shaft, knob firmly connects it by glue or other stickum with switch shaft when being connected.But, in the use of reality, following phenomenon usually appears: one, because in long-term use, the knob of switch is rotated continually, cause between knob and the switch shaft and lose viscosity, take place between knob and the switch shaft to become flexible, cause operation to have some setbacks; Two, if switch breaks down when needing to repair, often all can take off knob from switch shaft earlier, split again and close inside and overhaul, but this will destroy switch shaft and be connected with viscosity between the knob, thereby cause the inconvenience of maintenance and the destructiveness of maintenance; Three, modal also is that the most serious problem is when operating personnel are unconscious when knob is applied excessive revolving force, and might cause switch shaft to be twisted off or knob is turned round brokenly, thereby causes serious destruction.

Summary of the invention

The utility model provides a kind of rotary switch, has solved in the prior art because operating personnel are unconscious when knob is applied excessive revolving force, makes the problem that switch shaft is twisted off or knob is turned round brokenly.

A kind of rotary switch, comprise knob and Switch main body, wherein Switch main body comprises switch shaft, knob is installed on the axle head of switch shaft, described knob is installed in by a stop means on the axle head of described switch shaft, is cylinder socket relation between described knob and the described stop means, and described stop means is fixed on the shell of described Switch main body, stop means is provided with draw-in groove and latch, and knob is provided with the grab that is connected with draw-in groove and is provided with the card that matches with latch.

In the technique scheme since by a stop means with switch shaft and firm the linking together of knob, make knob in long-term use, can not produce and rock; Match by draw-in groove on the stop means and the grab on the knob, limited the axially-movable between knob and the switch shaft, thereby knob is difficult for coming off from the axle head of switch shaft; Match with card on the knob by the latch on the stop means, the knob that makes drives switch shaft and can only rotate in the certain angle scope, even when the power on being applied to knob is excessive, because latch makes the twisting resistance of knob be subjected to certain resistance by blocking card, also just is not easy switch shaft to be twisted off or knob is turned round brokenly.

As preferably, described grab and card are distributed on the cylinder side wall of knob, and grab and card space arrange, and described draw-in groove and latch are distributed on the cylinder side wall of stop means.Described grab and draw-in groove are respectively two, and described card and latch are respectively two, and the card arc length is less than the arc length between two latches, this technical scheme make knob cooperate with stop means simply, convenient and be connected firmly.

As further preferred, described stop means is installed on the Switch main body by a flat board, flat board is provided with location-plate, the shell of Switch main body is provided with positioning body, described location-plate and positioning body match. and described location-plate of this technical scheme and positioning body are respectively two, when stop means is installed on the shell of Switch main body, because the cooperation of location-plate and positioning body is fit to not do relative motion between stop means and the Switch main body.

The utility model is owing to the stop means that adopts a simple structure that is connected at switch shaft and knob, make that not only being connected of switch shaft and knob is more fastening, and when switch keeps in repair for convenience detach and damaging property not, the more important thing is that stop means of the present utility model structurally plays an auxiliary position-limiting action, make operating personnel unconscious down knob is applied excessive when reversing dynamics, can avoid switch shaft to be twisted off or knob is turned round brokenly, have simple in structure, connect reliably the advantage that security performance is high.

Description of drawings

Fig. 1 is the blast structural representation of the assembly of the utility model rotary switch;

Fig. 2 is the upward view of the utility model knob;

Fig. 3 is the front view of the utility model knob;

Fig. 4 is the upward view of the utility model stop means;

Fig. 5 is the front view of the utility model stop means;

Among the figure: 1, knob, 1a, grab, 1b, card, 1c, axis hole,

2, Switch main body, 2a, switch shaft, 2b, positioning body,

3, stop means, 3a, draw-in groove, 3b, latch, 3c, flat board, 3d, location-plate.

Embodiment

One, structure of the present utility model and effect

Shown in Fig. 1 to 5, a kind of rotary switch comprises knob 1, Switch main body 2 and stop means 3; Switch main body 2 comprises a switch shaft 2a who is connected with knob 1, and the shell of Switch main body 2 is provided with the positioning body 2b of two symmetrical distributions that are used for fixing stop means 3, and positioning body 2b is column; Be provided with one in the knob 1 and be used for the axis hole 1c that is connected with switch shaft 2a end, the structure of axis hole 1c is identical with the contour structure of switch shaft 2a, also be provided with one on the knob 1 and be used for the cylindrical shape thin-walled that matches with stop means 3; being circle distribution on the thin-walled has grab 1a and card 1b; wherein grab 1a and card 1b are for being spaced; grab 1a is two, and card 1b is two; Stop means 3 is provided with a cylindrical shape thin-walled that matches with knob 1; thin-walled is provided with draw-in groove 3a that is connected with grab 1a that is circle distribution and the latch 3b that matches with card 1b; draw-in groove 3a is two; latch 3b is two; the length of the circular arc that forms between two latch 3b is greater than the arc length of card 1b; also be provided with a dull and stereotyped 3c on the stop means 3; dull and stereotyped 3c is vertically set on the below of the cylindrical shape thin-walled of stop means 3; break-through on dull and stereotyped 3c of cylindrical shape thin-walled; be provided with the location-plate 3d that matches with positioning body 2b on dull and stereotyped 3c; positioning body 2b is cylindric, and location-plate 3d is the curved sheets with positioning body 2b same curvature.

Two, annexation of the present utility model and effect

Referring to each attached body, the utility model carries out the cylinder socket with stop means 3 and knob 1 earlier, during socket, grab 1a on the knob 1 just in time snaps among the draw-in groove 3a on the stop means 3, carried out axial fix with knob 1 and stop means 3 this moment, and the card 1b on the knob 1 just in time is installed in the circular arc zone that forms between two latch 3b of stop means 3 at this moment, and because the length in the circular arc zone that forms between two latch 3b is greater than the arc length of card 1b, knob 1 can only rotate in the angle in this circular arc zone, the knob 1 that will install stop means 3 then is connected on the switch shaft 2a by axis hole 1c, adjust the circumferential position of stop means 3 on knob 1 slightly, this moment stop means 3 by two circular arc location-plate 3d on it be fixed on the shell of Switch main body 2 after cylinder positioning body 2b matches, like this when turning knob 1, switch shaft 2a follows knob 1 to rotate together, stop means 3 keeps relative static with Switch main body 2, when knob 1 rotates to certain angle, latch 3b on the stop means 3 and the card 1b on the knob 1 collide, latch 3b just stops card 1b to be rotated further, be that knob 1 is forced to rotate and stops, so just avoided when rotary torque is excessive, switch shaft 2a twisted off or the situation that knob 1 is turned round is brokenly taken place, and its structure connects simple and reliable, and long-term the use also is difficult for producing loosening phenomenon.

Three, principle of work of the present utility model

The utility model stop means 3 is flexible connection with knob 1 in circumferential direction, knob 1 is fixed on the axle head of switch shaft 2b, stop means 3 is fixed on the shell of Switch main body 2, when turning knob 1, twisting resistance on the knob 1 drives switch shaft 2b and rotates together, when being rotated further certain position, relative collision takes place in the draw-in groove 3a on the card 1b on the knob 1 and the stop means 3, this moment, knob 1 can't be rotated further, if knob 1 is by opposite spin, same when knob 1 is torqued into certain position, knob 1 can not be rotated further.This reality is novel to cause broken ring to switch shaft 2b and knob 1 when having prevented that torque is excessive again when realizing changeing shelves smoothly, if the while when switch keeps in repair, unload this stop means 3 just can be for convenience detach and the destruction of not causing knob 1.

Claims

1. rotary switch, comprise knob (1) and Switch main body (2), wherein Switch main body (2) comprises switch shaft (2a), knob (1) is installed on the axle head of switch shaft (2a), it is characterized in that: described knob (1) is installed on the axle head of described switch shaft (2a) by a stop means (3), be cylinder socket relation between described knob (1) and the described stop means (3), described stop means (3) is fixed on the shell of described Switch main body (2), described stop means (3) is provided with draw-in groove (3a) and latch (3b), and described knob (1) is provided with the grab (1a) that is connected with draw-in groove (3a) and is provided with the card (1b) that matches with latch (3b).

2. rotary switch according to claim 1, it is characterized in that: described grab (1a) and card (1b) are distributed on the cylinder side wall of knob (1), and grab (1a) and the interlaced arrangement of card (1b), described draw-in groove (3a) and latch (3b) are distributed on the cylinder side wall of stop means (3).

3. rotary switch according to claim 1 and 2, it is characterized in that: described grab (1a) and draw-in groove (3a) are respectively two, described card (1b) and latch (3b) are respectively two, and card (1b) circumferential length is less than the circumferential length between two latches (3b).

4. rotary switch according to claim 1 and 2, it is characterized in that: described stop means (3) is installed on the Switch main body (2) by a flat board (3c), dull and stereotyped (3c) is provided with location-plate (3d), the shell of Switch main body (2) is provided with positioning body (2b), and described location-plate (3d) and positioning body (2b) match.

5. rotary switch according to claim 3, it is characterized in that: described stop means (3) is installed on the Switch main body (2) by a flat board (3c), dull and stereotyped (3c) is provided with location-plate (3d), the shell of Switch main body (2) is provided with positioning body (2b), and described location-plate (3d) and positioning body (2b) match.