KR101482744B1 - Pull-to-turn rotary switch - Google Patents

Abstract

The present invention relates to a pull-to-turn rotary switch capable of efficiently preventing the leakage inflow of moisture from the outside. The pull-to-turn rotary switch includes: a housing which has a cylindrical body, an end wall blocking an end part of the cylindrical body and having multiple non-penetration stop pin insertion holes in a position separated from a shaft center, and an extension tubular part extended to the outside along the shaft center and having an arbor hole formed to be connected to the inside of the cylindrical body; a rotary shaft which is inserted into the arbor hole of the extension tubular part in order to rotate and move in an axial direction, has a rotary contact point click member combined with an inner end part in order to be rotatable in one united body, and is combined with an operation knob in an end part of the outside; a control arm which is combined to move in the inner end part area of the rotary shaft in a longitudinal direction and a rotary direction in one united body and is extended in a radial direction; a compression spring which elastically pushes the rotary shaft inwards by being interposed between the control arm and the end wall; a stepped stopper which is accommodated in the cylindrical body, has multiple hanging protrusions formed in a stepped shape in an axial line direction in order to limit the rotation range of the control arm, and has a stopping pin engaging hole which corresponds to the stopping pin insertion hole; and multiple stopping pins which stop the stepped stopper from relatively rotating about the housing by being respectively and partially inserted into the stopping pin insertion hole and the stopping pin engaging hole. Thereby the present invention provides an effect which prevents outside water from being leaked and flowing into the inside of the cylindrical housing of the pull-to-turn rotary switch.

Description

{PULL-TO-TURN ROTARY SWITCH}

The present invention relates to a pulling rotary switch.

Pull rotary rotary switch, which is a type of rotary switch that adjusts stepwise by rotating rotary contact member with rotary shaft, can be multi-step adjustable stepwise by pulling the rotary shaft in the axial direction. For such axial multi-step adjustment, the pulling rotary switch is provided with a stepped stopper in the cylindrical housing to cascade the adjustment arm fixed to the rotary shaft.

Such a pulling rotary rotary switch, as disclosed in U.S. Patent No. 4,356,360, has a structure in which the fixing pin is inserted through the end wall of the cylindrical housing so as to fix the stepped stopper in the cylindrical housing whose one end is closed by the end wall, And is engaged with the stepped stopper.

However, in such a structure, in the case where the fixing pin is used in the water or through the through hole through the through hole, external water leaks and often makes it impossible to maintain the proper performance of the electric parts in the cylindrical housing. Especially, since the pulling rotary rotary switch is often used in military equipments such as night vision, it is often exposed to harsh conditions, so the airtight failure inside the switch can have a fatal result. Such leakage may occur along the outer surface of the rotary shaft not only in the through-hole for the fixing pin, but also in the upper portion of the extension pipe extending out along the axial center on the end wall to receive the rotary shaft.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a pulling-type rotary switch capable of effectively preventing leakage of water from the outside.

According to the present invention, there is provided a pulling rotary switch including: a cylindrical body; an end wall having a plurality of non-penetrating stopping pin insertion holes formed at a position spaced from the central axis by blocking one end of the cylindrical body; A housing having an extension pipe upper portion extending outwardly along the main body and having an axial hole communicating with the inside of the cylindrical main body; A rotary shaft rotatably and axially movably inserted into the shaft hole in the upper portion of the extension pipe, the rotary shaft having a rotary contact click member integrally rotatably coupled to an inner end thereof and an operation knob coupled to an outer end thereof; A radially extending adjustment arm coupled to the inner end region of the rotary shaft for unidirectional movement in a longitudinal direction and a rotational direction; A compression spring interposed between the adjustment arm and the end wall to elastically push the rotary shaft inward; And a plurality of stoppers, which are accommodated in the cylindrical main body and that limit the rotation range of the adjustment arm, are formed stepwise along the axial direction, and the stepped stopper having a stopping pin water ring hole corresponding to the stopping pin insertion hole Wow; And a plurality of stop pins which are partially inserted into the stop pin insertion holes and the stop pin engagement holes to prevent the stepped stopper from rotating relative to the housing .

Here, it is preferable to include a movable sleeve inserted into the rotary shaft and pressed by the compression spring to the end wall, and a hermetic seal interposed between the movable sleeve and the end wall.

The fixing sleeve may include a stationary airtight seal inserted into the shaft hole at the upper portion of the extension pipe so as to surround the rotary shaft from the inside of the housing and a stationary sleeve inserted into the shaft hole to press the stationary airtight seal, And the fixing sleeve preferably has an end flange at an inner end thereof.

According to the above-described structure of the present invention, it is possible to prevent leakage of water from the outside into the cylindrical housing of the pulling rotary switch.

1 is a sectional view of a pulling rotary switch according to an embodiment of the present invention.

Hereinafter, embodiments according to the present invention will be described with reference to the drawings.

As shown in FIG. 1, the pulling rotary switch according to the embodiment of the present invention has a cylindrical housing 100 and a rotary shaft 200 inserted into the housing 100.

The housing 100 includes a cylindrical body 110 and an end wall 120 blocking one end of the cylindrical body 110. In the end wall 120, a plurality of non-through stopping pin insertion holes 121 are formed to open to the inner surface at a position spaced from the axis. Since the through-hole fastening pin insertion hole 121 does not penetrate through the end wall 120, there is no possibility that water from the outside is leaked through the through hole. The through-hole fastening pin insertion hole 121 is formed to a thickness approximately equal to the thickness of the end wall 120 so as to prevent the detent pin 300 from being detached.

The end wall 120 is formed integrally with the end wall 120 with an extension pipe 130 extending outwardly along the axis. A shaft hole (131) communicating with the inside of the cylindrical main body (110) is formed in the extension pipe upper part (130) along the axial direction. A long rod-shaped rotary shaft 200 is inserted through the shaft hole 131 of the extension pipe 130 so as to be rotatable and axially movable.

A rotary contact click member 400 is integrally rotatably coupled to an inner end of the rotary shaft 200 and an operation knob (not shown) is coupled to an outer end of the rotary contact click member 400. The rotary shaft 200, The rotary shaft 400 can be rotated and, if necessary, the rotary shaft 200 can be pulled out along the axial direction. The inner end of the rotary shaft 200 has a non-circular cross-sectional shape, preferably a cross-sectional shape, of a section of the inner end in order to be rotatably coupled with the rotary contact clicking member 400, The axial center of the click member 400 also has a coupling hole that engages correspondingly to its shape.

The rotating contact clicking member 400 is formed with a plurality of rotating click projections in the circumferential direction and a plurality of fixed click projections 140 protruding from the inner surface of the cylindrical body 110 in correspondence therewith. Accordingly, when the rotary contact point click member 400 is rotated, it is elastically deformed by the engagement with the fixed click protrusion 140, and rotates to apply intermittent rotation resistance. This click resistance serves to prevent the rotating contact click member 400 from generating undesired rotational movement in the cylindrical main body 110.

The stationary contact member 500 is disposed in parallel to correspond to the rotating contact click member 400. [ The stationary contact member is integrally coupled to the end cap 600 blocking the end of the cylindrical main body 110 on the opposite side of the end wall 120 and is held in a relatively fixed state with respect to the rotating contact click member 400 . A plurality of contact springs 412 are provided in the rotating contact clicking member 400 toward the stationary contact member 500. The contact spring 412 is provided with elastic contact members 410 through the fixing pins 411 Lt; / RTI > The elastic contact members 410 rotate together with the elastic contact members 500 elastically contacted with the fixed contact protrusions 510 of the stationary contact member 500 and contact with other fixed contact protrusions 510 of the stationary contact member 410, Sexual contact.

When the rotary shaft 200 is rotated, the rotation contact clicking member 400 is rotated so that the elastic contact member 410 is brought into contact with the fixed contact projection 510 of the stationary contact member 500. Since the rotary contact point click member 400 is engaged with the fixed click projection 140, when the rotary shaft 200 is rotated, the rotary contact point click member 400 is intermittently rotated without being smoothly and continuously rotated. The rotation of the rotary shaft 200 is rotated in accordance with the number of the fixed click protrusions 140 so that the operation knob is also operated by being adjusted to the number of the fixed click protrusions 140.

When the elastic contact member 410 and the fixed contact protrusion 510 are in contact with each other, a signal is transmitted to the connection terminal 520 coupled to the fixed contact member 500. The housing 100 including the rotating contact click member 400 is shielded from the outside by the end cap 600 and the plurality of connection terminals 520 are formed by the through hole 610 formed in the end cap 600. [ Respectively. The number of connection terminals 520 is different depending on the purpose of use. The stationary contact member 500 is preferably made of an insulator so that the signal received by the stationary contact protrusion 510 can be smoothly transmitted to the connection terminal 520.

The compression spring 230 is interposed between the adjustment arm 220 and the end wall 120 to elastically push the rotary shaft 200 inward. The pulling rotary rotary switch can be operated in two steps by rotating the operation knob or rotating the operation knob by pulling in the user direction. When the user rotates the operation knob coupled to the rotary shaft 200, the rotary shaft 200 is protruded from the upper portion 130 of the extension pipe by a predetermined length. When the user completes the operation, The shaft 200 returns to its home position along the axial direction. Here, the compression spring 230 may be replaced by a leaf spring.

The rotary shaft (200) is coupled with the movable sleeve (240) and the hermetic seal (250). The movable sleeve 240 is inserted into the rotary shaft 200 and is urged in the direction of the end wall 120 by the compression spring 230. A hermetic seal (250) is interposed between the end wall (120) and the movable sleeve (240). When the movable sleeve 240 is pressed in the direction of the end wall 120, the airtight seal 250 is brought into close contact with the end wall 120, thereby preventing the leakage of the air into the shaft hole 131 of the upper portion 130. And also minimizes the friction between the movable sleeve 240 and the end wall 120 when the rotary shaft 200 moves in the axial direction.

A fixed hermetic seal 132 and a fixed sleeve 133 are inserted in the shaft hole 131 of the extension pipe 130 as well as the end wall 120 to surround the rotary shaft 200. The fixed hermetic seal 132 is pressed by the fixed sleeve 133 inserted in the shaft hole 131 and the fixed sleeve 133 is forced into the shaft hole 131. The fixing sleeve 133 has an end flange 133a extending radially at the inner end thereof to facilitate the assembling operation.

Thus, leakage of water from the outside into the shaft hole 131 can be prevented by the hermetic seal 250 and the fixed hermetic seal 132. The hermetic seal 250 and the fixed hermetic seal 132 are preferably made of an elastic material such as rubber.

Inside the cylindrical main body 110, a stepped stopper 700 for limiting the rotation range of the adjustment arm 220 is accommodated. The stepped stopper 700 has a plurality of stopping protrusions 710 and 720 formed stepwise along the axial direction and has a stop pin binding hole 730 corresponding to the non-through stopping pin insertion hole 121. Since the range in which the engaging protrusions 710 and 720 are formed is different from the first and second ranges in the first engaging protrusion 710 and the second engaging protrusion 720, The fixed contact protrusions 510 to which the contact portions 410 contact are different. That is, when the user rotates the operation knob to rotate the adjustment arm 220 at the first stopping jaw 710, the fixed tilting projection 510 contacts or is spaced apart and the operation knob is pulled in the direction of the user to rotate the second stopping jaw 720 And then the rotary shaft 200 is rotated, the contact portion 410 is contacted with or spaced from the fixed contact protrusion 510 having a different protrusion length.

The stop pin engagement hole 730 corresponds to the non-through stop pin insertion hole 121 of the end wall 120 and the non-through stop pin insertion hole 121 and the stop pin engagement hole 730 correspond to the rotary shaft 200 The stop pin 300 is inserted into the through hole. The through-hole fastening pin insertion hole 121, the stop pin engagement hole 730 and the stop pin 300 are placed in a straight line, and the step-like stopper 700 is supported to be fixed to the housing 100. In addition, a plurality of teeth are formed to prevent relative rotation with respect to the housing 100. The detent pin 300 is constrained to the stop pin engagement hole 730 to prevent it from being disengaged from the end wall 120. Since the detent pin 300 is fitted to the end wall 120 not through the end wall 120, leakage of the detent pin 300 is prevented by the conventional detent pin and the detent pin hole.

100: housing 110: cylindrical body
120: end wall 121: non-through stop pin insertion hole
130: extension pipe upper part 131:
132: fixed hermetic seal 133: fixed sleeve
133a: End flange 140: Fixed click projection
200: rotary shaft 210:
220: adjusting arm 230: compression spring
240: movable sleeve 250: airtight seal
300: stop pin 400: rotating contact point member
410: Elastic contact member 411: Fixing pin
412: contact spring 500: stationary contact member
510: fixed contact protrusion 520: connection terminal
600: end cap 610: through hole
700: Stepped stopper 710: First stopping jaw
720: Second stopping jaw 730: Stop pinching ball

Claims (5)

In a pulling rotary rotary switch,
An end wall which blocks the one end of the cylindrical main body and has a plurality of non-penetrating stop pin insertion holes at a position spaced from the central axis, and a shaft hole extending outwardly along the axis and communicating with the inside of the cylindrical main body, A housing having an extended tube upper portion formed therein;
A rotary shaft rotatably and axially movably inserted into the shaft hole in the upper portion of the extension pipe, the rotary shaft having a rotary contact click member integrally rotatably coupled to an inner end thereof and an operation knob coupled to an outer end thereof;
A radially extending adjustment arm coupled to the inner end region of the rotary shaft for unidirectional movement in a longitudinal direction and a rotational direction;
A compression spring interposed between the adjustment arm and the end wall to elastically push the rotary shaft inward;
And a plurality of stoppers, which are accommodated in the cylindrical main body and that limit the rotation range of the adjustment arm, are formed stepwise along the axial direction, and the stepped stopper having a stopping pin water ring hole corresponding to the stopping pin insertion hole Wow;
And a plurality of stop pins partially inserted into the stop pin insertion holes and the stop pin engagement holes to prevent the stepped stopper from rotating relative to the housing. The method according to claim 1,
A movable sleeve inserted into the rotary shaft and pressed against the end wall by the compression spring; and a hermetic seal interposed between the movable sleeve and the end wall. 3. The method according to claim 1 or 2,
A fixed airtight seal inserted into the shaft hole in the upper portion of the extension pipe so as to surround the rotary shaft from the inside of the housing; and a fixed sleeve inserted in the shaft hole to press the fixed airtight seal. The method of claim 3,
Wherein the fixed sleeve is constrained in the shaft hole. The method of claim 3,
Wherein the fixed sleeve has an end flange at an inner end thereof.

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