CN210865993U

CN210865993U - Flame-proof type micro key mechanism

Info

Publication number: CN210865993U
Application number: CN201921859416.3U
Authority: CN
Inventors: 包俊义; 陈守永
Original assignee: Tianjin Longdian Electric Engineering Co ltd
Current assignee: Tianjin Longdian Electric Engineering Co ltd
Priority date: 2019-10-31
Filing date: 2019-10-31
Publication date: 2020-06-26
Anticipated expiration: 2029-10-31

Abstract

The utility model provides a flame-proof type micro button mechanism, which comprises a button cap, a mechanism seat, a mechanism shaft and a safety nut; the key cap is in threaded connection with the mechanism shaft, and a mechanism seat is sleeved outside the mechanism shaft; the mechanism seat is welded and fixed with the box cover, and the box cover is fixedly connected with the explosion-proof instrument with the keys; an adjusting groove is formed in the end face of the bottom of the mechanism seat, a safety nut is connected to the bottom of the mechanism seat in a threaded mode, and an adjusting space is formed between the adjusting groove and the safety nut; the mechanism shaft sequentially penetrates through the adjusting space and the safety nut; the outer side wall of the part of the mechanism shaft arranged in the adjusting space extends outwards to form a limiting part, a linkage spring is arranged below the limiting part, and the linkage spring is sleeved on the outer wall of the mechanism shaft. The utility model discloses create this kind of flame-proof type miniature button mechanism be applicable to steel sheet welded forming explosion-proof electrical equipment, can select more brand models to take the button instrument, the original structure of ordinary area button instrument does not change, rational in infrastructure, safe and reliable.

Description

Flame-proof type micro key mechanism

Technical Field

The invention belongs to the field of explosion-proof electrical equipment, and particularly relates to an explosion-proof micro key mechanism.

Background

At present, an instrument with keys used on explosion-proof electrical equipment is mainly formed by combining an explosion-proof observation operating mechanism and a common instrument, and further meets the requirements of explosion-proof performance and electrical performance of the explosion-proof electrical equipment. The existing explosion-proof operating mechanism with the key instrument has the advantages of fewer types, complex structure and unreliable operation, can not meet the requirement of selecting diversified key instruments for explosion-proof electrical equipment, often needs to transform the original keys, and can not reduce the risk of key ejection when the explosion really occurs.

Disclosure of Invention

In view of this, the invention aims to provide an explosion-proof micro key mechanism to solve the problem of security when the key is not well guaranteed to explode.

In order to achieve the purpose, the technical scheme of the invention is realized as follows:

a flame-proof type micro key mechanism is used on an explosion-proof instrument with keys and comprises a key cap, a mechanism seat, a mechanism shaft and a safety nut;

the key cap is in threaded connection with the mechanism shaft, and a mechanism seat is sleeved outside the mechanism shaft;

the mechanism seat is welded and fixed with the box cover, and the box cover is fixedly connected with the explosion-proof instrument with the keys;

an adjusting groove is formed in the end face of the bottom of the mechanism seat, a safety nut is connected to the bottom of the mechanism seat in a threaded mode, and an adjusting space is formed between the adjusting groove and the safety nut;

the mechanism shaft sequentially penetrates through the adjusting space and the safety nut;

the outer side wall of the mechanism shaft part arranged in the adjusting space extends outwards to form a limiting part, a linkage spring is arranged below the limiting part and sleeved on the outer wall of the mechanism shaft, one end of the linkage spring is abutted against the bottom of the limiting part, and the other end of the linkage spring is abutted against a safety nut;

the limiting part is matched with the bottom position of the adjusting groove, and the limiting part can be abutted against the bottom of the adjusting groove when the linkage spring is in a stretching state.

Furthermore, the safety nut is of a U-shaped cap body structure, the safety nut covers the bottom of the mechanism seat, threads are turned on the outer wall of the bottom of the mechanism seat, and the safety nut is screwed with the bottom of the mechanism seat through the threads.

Furthermore, the side wall of the top of the mechanism seat protrudes outwards to form a clamping ring, and the clamping ring abuts against the surface of the box cover.

Furthermore, the outside of the button cap is covered with a rubber cap.

Further, the top of mechanism seat outwards extends and forms firm supporting part, forms the adjustment clearance between this firm supporting part and the case lid, has covered the rubber cap in the button cap outside, and the bottom portion lateral wall of this rubber cap outwards extends and forms rubber cap joint portion, and this rubber cap joint portion card is established in the adjustment clearance.

Furthermore, the top of the mechanism seat is also provided with a stabilizing ring which is sleeved outside the mechanism shaft, and the key cap is positioned above the stabilizing ring.

Furthermore, the outside of the key cap is covered with a rubber cap, and the rubber cap is abutted against the outer side wall of the stabilizing ring.

Furthermore, the part of the mechanism shaft penetrating out of the safety nut is coated by the key sheath.

Furthermore, an O-shaped ring is sleeved at the top of the limiting part and is abutted against the inner wall of the adjusting groove.

Furthermore, an adjusting sliding plate is further arranged in the adjusting space and is in sliding connection with the inner wall of the adjusting groove, and an O-shaped ring is arranged between the adjusting sliding plate and the limiting part.

Furthermore, an adjusting spring is arranged above the adjusting sliding plate, one end of the adjusting spring is abutted against the bottom of the adjusting groove, and the other end of the adjusting spring is abutted against the adjusting sliding plate.

If the inner key button of the explosion-proof instrument with the keys protrudes, a clamping collar can be clamped at the bottom of the mechanism shaft, and the clamping collar is clamped with the protruding button inside the instrument, so that the stable operation of the whole key mechanism is ensured.

Compared with the prior art, the explosion-proof type micro key mechanism has the following advantages:

the flameproof miniature key mechanism is suitable for steel plate welding forming flameproof electrical equipment, more brands and models of instruments with keys can be selected, the original structure of the common instrument with keys is not changed, the common instrument with keys accords with the national standard, and the flameproof miniature key mechanism is small in appearance size, reasonable in structure, convenient to manufacture, convenient to use, safe and reliable. Meanwhile, the explosion resistance of the whole design scheme is also increased by the structural establishment of the stable supporting part and the limiting part.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and, together with the description, serve to explain the invention without limitation. In the drawings:

FIG. 1 is a schematic view of an explosion-proof micro key mechanism according to an embodiment of the invention;

fig. 2 is an optimized schematic diagram of an explosion-proof micro key mechanism according to the embodiment of the invention.

Description of reference numerals:

1 rubber cap, 11 rubber cap clamping parts, 2 key caps, 3 mechanism seats, 31 stable supporting parts, 4 box covers, 5 mechanism shafts, 51 limiting parts, 6O-shaped rings, 7 linkage springs, 8 safety screw caps, 9 key sheaths, 10 adjusting springs, 12 adjusting sliding plates, 13 adjusting spaces, 14 stabilizing rings and 15 clamping hoops

Detailed Description

It should be noted that the embodiments and features of the embodiments of the present invention may be combined with each other without conflict.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings, which are merely for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be construed as limiting the invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the invention, the meaning of "a plurality" is two or more unless otherwise specified.

In the description of the invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "connected" and "connected" are to be construed broadly, e.g. as being fixed or detachable or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the creation of the present invention can be understood by those of ordinary skill in the art through specific situations.

The invention will be described in detail with reference to the following embodiments with reference to the attached drawings.

As shown in fig. 1 and 2, the flameproof micro key mechanism is used on an explosion-proof instrument with keys, and comprises a key cap 2, a mechanism seat 3, a mechanism shaft 5 and a safety nut 8;

the key cap 2 is in threaded connection with the mechanism shaft 5, and the mechanism base 3 is sleeved outside the mechanism shaft 5;

the mechanism seat 3 is fixedly welded with the box cover 4, and the box cover 4 is fixedly connected with the explosion-proof instrument with the keys;

an adjusting groove is formed in the end face of the bottom of the mechanism base 3, the bottom of the mechanism base 3 is in threaded connection with a safety nut 8, and an adjusting space 13 is formed between the adjusting groove and the safety nut 8;

the mechanism shaft 5 penetrates through the adjusting space 13 and the safety nut 8 in sequence;

the outer side wall of the part of the mechanism shaft 5 arranged in the adjusting space 13 extends outwards to form a limiting part 51, a linkage spring 7 is arranged below the limiting part 51, the linkage spring 7 is sleeved on the outer wall of the mechanism shaft 5, one end of the linkage spring 7 is abutted against the bottom of the limiting part 51, and the other end of the linkage spring 7 is abutted against a safety nut 8;

the limiting part 51 is matched with the bottom position of the adjusting groove, and the limiting part 51 can abut against the bottom of the adjusting groove when the linkage spring 7 is in a stretching state. An O-shaped ring 6 is sleeved on the top of the limiting part 51, and the O-shaped ring 6 is abutted against the inner wall of the adjusting groove.

The safety nut 8 is of a U-shaped cap structure, the safety nut 8 covers the bottom of the mechanism base 3, threads are turned on the outer wall of the bottom of the mechanism base 3, and the safety nut 8 is screwed with the bottom of the mechanism base 3 through the threads.

The top side wall of the mechanism seat 3 protrudes outwards to form a clamping ring which is abutted against the surface of the case cover 4.

The outside of the key cap 2 is covered with a rubber cap 1, and the rubber cap 1 is abutted with the outer side wall of the stabilizing ring 14.

The part of the mechanism shaft 5 penetrating out of the safety nut 8 is covered by a key sheath 9.

The top of mechanism seat 3 outwards extends and forms firm supporting part 31, forms the adjustment clearance between this firm supporting part 31 and the case lid 4, is covered with rubber cap 1 in 2 outsides of button key, and the outside extension of bottom side wall of this rubber cap 1 forms rubber cap joint portion, and this rubber cap joint portion card is established in the adjustment clearance.

The top of the mechanism seat 3 is also provided with a stabilizing ring 14, the stabilizing ring 14 is sleeved outside the mechanism shaft 5, and the key cap 2 is positioned above the stabilizing ring.

An adjusting sliding plate 12 is further arranged in the adjusting space 13, the adjusting sliding plate 12 is in sliding connection with the inner wall of the adjusting groove, and the O-shaped ring 6 is arranged between the adjusting sliding plate 12 and the limiting part 51. An adjusting spring 10 is further arranged above the adjusting sliding plate 12, one end of the adjusting spring 10 is abutted to the bottom of the adjusting groove, and the other end of the adjusting spring 10 is abutted to the adjusting sliding plate 12.

If the inner key button of the explosion-proof instrument with the keys protrudes, the clamping collar 15 can be clamped at the bottom of the mechanism shaft, and the clamping collar 15 is clamped with the protruding button inside the instrument, so that the stable operation of the whole key mechanism is ensured.

When a key is needed to be pressed, the key cap 2 drives the mechanism shaft 5 to compress the linkage spring 7, so that the mechanism shaft 5 moves downwards and a key switch is triggered;

the cover 4 may be the housing of the whole instrument or a component of the present mechanism, which needs to be fixedly connected with the instrument housing.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and should not be taken as limiting the invention, so that any modifications, equivalents, improvements and the like, which are within the spirit and principle of the present invention, should be included in the scope of the present invention.

Claims

1. The utility model provides a miniature button mechanism of flame-proof type, this mechanism uses on the explosion-proof key instrument of taking, its characterized in that: comprises a key cap, a mechanism seat, a mechanism shaft and a safety nut;

2. The flameproof miniature key mechanism of claim 1, which is characterized in that: the safety nut is of a U-shaped cap body structure, the safety nut covers the bottom of the mechanism seat, threads are turned on the outer wall of the bottom of the mechanism seat, and the safety nut is screwed with the bottom of the mechanism seat through the threads.

3. The flameproof miniature key mechanism of claim 1, which is characterized in that: the side wall of the top of the mechanism seat protrudes outwards to form a clamping ring, and the clamping ring is abutted against the surface of the box cover.

4. The flameproof miniature key mechanism of claim 1, which is characterized in that: the outside of the button cap is covered with a rubber cap.

5. The flameproof miniature key mechanism of claim 1, which is characterized in that: the top of mechanism seat outwards extends and forms firm supporting part, forms the adjustment clearance between this firm supporting part and the case lid, has covered the rubber cap outside the button cap, and the bottom portion lateral wall of this rubber cap outwards extends and forms rubber cap joint portion, and this rubber cap joint portion card is established in the adjustment clearance.

6. The flameproof miniature key mechanism of claim 1, which is characterized in that: the mechanism seat top still is equipped with the stabilizing ring, the stabilizing ring cover is established in the outside of mechanism axle, and presses the key cap to be located this stabilizing ring top.

7. The flameproof miniature key mechanism of claim 5, characterized in that: the outside of the key cap is covered with a rubber cap which is abutted against the outer side wall of the stabilizing ring.

8. The flameproof miniature key mechanism of claim 1, which is characterized in that: the part of the mechanism shaft penetrating out of the safety nut is coated by the key sheath.

9. The flameproof miniature key mechanism of claim 1, which is characterized in that: the top of the limiting part is sleeved with an O-shaped ring, and the O-shaped ring is abutted against the inner wall of the adjusting groove.

10. The flameproof miniature key mechanism of claim 9, characterized in that: an adjusting sliding plate is further arranged in the adjusting space and is in sliding connection with the inner wall of the adjusting groove, and the O-shaped ring is arranged between the adjusting sliding plate and the limiting part.