CN210743830U

CN210743830U - Portable waterproof travel switch

Info

Publication number: CN210743830U
Application number: CN201921684322.7U
Authority: CN
Inventors: 姚亦斌
Original assignee: Shanghai Huasheng Electric Co ltd
Current assignee: Shanghai Huasheng Electric Co ltd
Priority date: 2019-10-10
Filing date: 2019-10-10
Publication date: 2020-06-12
Anticipated expiration: 2029-10-10

Abstract

The utility model relates to the technical field of electric appliance control, in particular to a portable waterproof travel switch, a leather sheath is arranged between a push rod cap and a shell, the outer edge of one end of the lower part of the leather sheath is matched with a circular groove at the periphery of a round hole of the shell, a groove is arranged on the outer edge of the lower part of the leather sheath, so that the outer edge of the bottom of the leather sheath is in a barb shape, an external thread is arranged on the lower part of a rear cover of the shell, sealing rubber is arranged in a cavity of the external thread, a sealing ring is arranged in an inner cavity of the external thread, the upper part of the sealing ring is abutted against the sealing rubber, the external thread extends out of the lower part of the sealing ring, the bottom of the external thread is connected with an internal thread of a threaded cover, the threaded cover moves upwards to drive the sealing ring, the sealing rubber is extruded, the sealing, more safety problems caused by water leakage can be avoided.

Description

Portable waterproof travel switch

Technical Field

The utility model relates to an electrical apparatus control technical field is a portable waterproof travel switch particularly.

Background

A travel switch is one of position switches and is a common low-current master control electrical appliance. The contact of the mechanical motion part is operated by the collision to realize the connection or disconnection of the control circuit, thereby achieving a certain control purpose. Generally, such switches are used to limit the position or stroke of the movement of the machine, so that the moving machine can automatically stop, move in reverse direction, shift or automatically move back and forth according to a certain position or stroke. The travel switch is mainly divided into a direct-acting type, a roller type, a micro-acting type and a combined type according to the structure, and the principles and the effects of different structural products are different.

The existing direct-acting elevator travel switch has unreasonable structure, poor working performance, unreliable connection of dynamic and static contacts and unsafe design of a shell. An invention patent is now disclosed: regarding the travel switch of elevator application, patent numbers: 2014107055503, the patent comprises an action component, a static component, a conversion component and a closing component, and is characterized in that when the pull rod of the action component is conducted to the spring by the action of external force, the movable contact silver nail on the spring switches the state of the static contact silver nail on the contact post in an open or closed state.

With the change of the use environment, the existing travel switch cannot reach the IP68 waterproof grade required in the market due to the unreasonable structural design, and the above patent also has the problem that the poor waterproof effect can reduce the service life of the switch, so that the risk is greatly increased, and therefore, the improvement and innovation of the prior art are needed.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve prior art in the waterproof performance not good, lead to the not high problem of switch life, provide a convenient to use, respond well portable waterproof travel switch.

In order to realize the purpose, design a portable waterproof travel switch, which comprises a shell, the round hole has been seted up to shell one end, and the round hole is used for passing the push rod cap, and the periphery of round hole surface is equipped with circular recess, and the shell other end is equipped with the square hole, and the square hole periphery is equipped with the recess, is connected with the notch cooperation that covers behind the casing, and its characterized in that still includes

The leather sheath is arranged between the push rod cap and the shell, the outer edge of one end of the lower part of the leather sheath is matched with the circular groove at the periphery of the circular hole of the shell, the outer edge of the lower part of the leather sheath is provided with a groove, so that the outer edge of the bottom of the leather sheath is in a barb shape,

lid lower part is equipped with the external screw thread behind the casing, is equipped with sealing rubber in the cavity of external screw thread, and the sealing washer sets up in the inner chamber of external screw thread, and sealing rubber is supported on sealing washer upper portion, and the external screw thread is stretched out to the lower part of sealing washer, and the internal thread connection of external screw thread bottom and screw thread lid, screw thread lid upward movement drive sealing washer upward movement extrudees sealing rubber, and sealing rubber produces deformation when receiving external force, extrudees to the centre.

The casing is characterized in that a casing sealing gasket is arranged in a groove on the periphery of the square hole of the casing, a rear cover sealing gasket is arranged in a groove opening on the rear cover of the casing, and the sections of the casing sealing gasket and the rear cover sealing gasket are circular.

The push rod cap is provided with a buckle which is connected with the touch rod in a matching way.

The internal thread of the thread cover and the external thread of the shell rear cover are trapezoidal threads.

An inner shell is also arranged in the outer shell.

Compared with the prior art, the utility model, its advantage lies in: many structural improvements are carried out to current elevator stroke for the water-proof effects of elevator stroke is better, when having increased life, can avoid more because the safety problem that leaks and lead to.

Drawings

FIG. 1 is an exploded view of the overall structure of the present invention;

FIG. 2 is a schematic view of a prior art holster;

FIG. 3 is a schematic view of the leather sheath of the present invention;

FIG. 4 is a schematic view of the push rod cap fastener of the present invention;

FIG. 5 is a schematic view of the housing back cover and back cover gasket of the present invention;

FIG. 6 is a schematic view of the housing back cover and the housing double-layer gasket of the present invention;

fig. 7 is a schematic view of the assembly of the screw cap and the rear cover of the housing according to the present invention;

in the figure: 1. the shell 2, the inner shell 3, the inner shell cover plate 4, the shell rear cover 5, the thread cover 6, the contact support 7, the contact rod 8, the push rod cap 9, the seal ring 10, the leather sheath 11, the shell sealing gasket 12, the rear cover sealing gasket 13, the sealing rubber 14, the left fixed contact plate 15, the right fixed contact plate 16, the movable contact plate 17, the contact spring 18, the reset spring 19, the manual reset spring 20, the spring pressure pad 21, the movable and stationary contacts 22, the shell rear cover screw 23 and the wiring screw.

Detailed Description

The structure and principle of such a device will be apparent to those skilled in the art from the following further description of the invention with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 1: the middle of the inner shell is provided with a cavity, the contact support is arranged in the cavity, the front end of the contact support is provided with a reset spring, the reset spring abuts against a baffle at the front end of the cavity of the inner shell, a spring pressure pad is arranged between the reset spring and the baffle, the rear end of the contact support is provided with a convex rod, the convex rod is inserted into one end of a touch rod, the other end of the touch rod is connected with a push rod cap, one side of the contact support is provided with a movable contact plate, the movable contact and the fixed contact are arranged on the movable contact plate, the bottom of the inner shell is provided with a fixed contact plate, the fixed contact plate is provided with a movable contact and a fixed contact, the movable contact and the fixed contact silver nails on the movable contact plate switch the movable contact and the fixed contact silver nails on the fixed contact plate in an open or closed state, the inner shell is arranged in the shell, one end of the shell is provided with, the leather sheath is connected with the round hole of the shell in a matching mode, and the push rod cap penetrates through the leather sheath and the round hole to be connected with the touch rod.

See fig. 2 and 3: the current leather sheath bottom is the linear type, and this design is along seting up the recess outward the leather sheath bottom, makes the leather sheath bottom outer edge be barb-like, and it is convenient inadequately when the leather sheath of linear type is installed, and it is slow to lead to efficiency, and waterproof performance is not good simultaneously, barb-like leather sheath simple to operate, and the barb makes frictional force increase between leather sheath and the shell round hole simultaneously, and waterproof performance is better, and the leather sheath adopts elastic material to make simultaneously, is equipped with the through-hole in the leather sheath, and leather sheath upper portion one end aperture is less than the aperture of push rod cap.

Referring to fig. 7: the waterproof rubber circle in the plug screw that all is the indirect tightening plug screw on the market, and be single directionality, the utility model discloses the screw cap directly compresses tightly sealing rubber, the direction is two-way, both ends can be to middle extrusion when sealing rubber receives external force, thereby it reaches sealed waterproof effect to wrap tight cable, lid bottom has increased the boss behind the casing, the hole of screw cap lead-out wire hole department also combines the size setting of national standard cable through the design, extrusion sealing rubber that can be better when cooperation sealing washer and sealing rubber and the lid equipment behind the casing makes it and draws forth the cable complete sealing, trapezoidal thread's design has also increaseed the effect of screwing up simultaneously and has played water-proof effects.

The shell rear cover and the external thread are of an integral structure, the height of the sealing rubber is smaller than that of the external thread, and the sealing rubber and an inner cavity of the external thread form a step structure.

Referring to fig. 4: the utility model discloses structure to touching pole and push rod cap is revised, has increased the buckle form, the waterproof performance of improvement leather sheath that can be better.

See fig. 5 and 6: all be equipped with the concave groove behind the casing on lid and the shell, the sealed pad of lid after the concave groove of lid is equipped with behind the casing, is equipped with the sealed pad of casing in the concave groove of shell, adopts inside and outside two-layer sealed structure, can improve waterproof performance to the greatest extent, changes the cross sectional shape of sealed pad into circularly by common flat simultaneously, can increase inside and outside sealed effect for waterproof performance is better, and it is circular simultaneously also can make the installation of sealed pad more convenient.

Referring to fig. 1: the utility model discloses travel switch plays the guard action to each spare part normal operating in product upper unit and the elevator, act unusually or exceed regulation stroke distance like the elevator, this switch just acts the turn-off power immediately, or drive other parts according to the designing requirement and make the elevator get into safe state, the push rod cap of action subassembly receives exogenic action and reaches for the contact support, the silver nail of sound contact on the movable contact board on the contact support breaks off or the closed state switches to the silver nail of sound contact on the fixed contact board of left side and the fixed contact board of right side, the action stroke is little, the location progress is high, the contact disconnection is reliable, realize control elevator mechanism work.

The movable contact plate and the static contact plate are made of H62 copper, the static contact silver nail and the movable contact silver nail are made of a silver-copper composite material, the contact rod is made of polyformaldehyde, the contact spring, the reset spring and the manual reset spring are made of 304 stainless steel, the leather sheath is made of a silicon rubber material, and the inner shell pressing plate is made of polycarbonate.

Claims

1. The utility model provides a portable waterproof travel switch, includes shell (1), the round hole has been seted up to shell (1) one end, and the round hole is used for passing push rod cap (8), and the periphery of round hole surface is equipped with circular recess, and the shell (1) other end is equipped with the square hole, and the square hole periphery is equipped with the recess, is connected with the notch cooperation on lid (4) behind the casing, and its characterized in that still includes

A leather sheath (10), the leather sheath (10) is arranged between the push rod cap (8) and the shell (1), the outer edge of one end of the lower part of the leather sheath (10) is matched with the circular groove at the periphery of the circular hole of the shell, the outer edge of the lower part of the leather sheath is provided with a groove, so that the outer edge of the bottom of the leather sheath is in a barb shape,

lid (4) lower part is equipped with the external screw thread behind the casing, is equipped with sealing rubber (13) in the cavity of external screw thread, and sealing washer (9) set up in the inner chamber of external screw thread, and sealing washer (9) upper portion is supported and is leaned on sealing rubber (13), and the external screw thread is stretched out to the lower part of sealing washer (9), and the internal thread connection of external screw thread bottom and screw cap, screw cap (5) upward movement drive sealing washer upward movement extrudees sealing rubber, and sealing rubber produces deformation when receiving external force, extrudees to the centre.

2. A portable water resistant travel switch as defined in claim 1, wherein: be equipped with the sealed pad of casing (11) in the peripheral recess in shell square hole, be equipped with the sealed pad of back lid (12) in the notch on lid (4) behind the casing, the sealed pad of casing (11) and the sealed pad (12) cross-section of back lid be circular.

3. A portable water resistant travel switch as defined in claim 1, wherein: the push rod cap (8) is provided with a buckle which is connected with the touch rod (7) in a matching way.

4. A portable water resistant travel switch as defined in claim 1, wherein: the internal thread of the thread cover and the external thread of the shell rear cover are trapezoidal threads.

5. A portable water resistant travel switch as defined in claim 1, wherein: an inner shell (2) is also arranged in the outer shell.