CN115732970A

CN115732970A - Household socket capable of preventing mistaken touch

Info

Publication number: CN115732970A
Application number: CN202211457431.1A
Authority: CN
Inventors: 张盛智; 张纬川; 石海强; 王超; 杨子星; 温炯良
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-11-17
Filing date: 2022-11-17
Publication date: 2023-03-03

Abstract

The invention relates to the technical field of household sockets, in particular to a household socket capable of preventing mistaken touch, which comprises a plug-in module and an adjusting module, wherein the plug-in module comprises a base body, the inner side surfaces of two sides of the top of the base body are respectively and rotatably connected with a connecting rod, the side surface of the connecting rod is rotatably connected with three baffle plates which are in contact with the inner side surface of the top of the base body, one side of the top surface of the base body is provided with a button, and the button is communicated with an internal circuit of the base body. According to the invention, the oval block is fixedly connected to one end of the round rod, the baffle can shield the socket on the base body, so that liquid can be prevented from entering the socket of the base body when children carelessly spray the liquid on the base body, meanwhile, the children are prevented from mistakenly touching the socket of the base body, the baffle is directly opened, the round rod can be driven by the baffle to rotate the oval block, the oval block is enabled to press the button, the power of the base body is cut off, therefore, the children are prevented from mistakenly touching, and the possibility that the children mistakenly touch the socket to cause danger is favorably reduced.

Description

Household socket capable of preventing mistaken touch

Technical Field

The invention relates to the technical field of household sockets, in particular to a household socket capable of preventing mistaken touch.

Background

Socket, also known as supply socket, switch socket, can insert various wiring, with other circuit switch-ons, and in domestic, can peg graft various electrical apparatus in the socket, connect the electrical apparatus electricity, but current domestic socket is when using, for the wiring convenience, generally directly place the socket on the desktop, make the socket easily by children direct contact like this, when other people do not look after children, children may touch the socket under curious driving, if children insert the interface of socket through metal conductive object, take place to electrocute danger easily, and if children spill liquid on the socket carelessly, also take place danger easily.

Disclosure of Invention

In order to overcome the technical problems, the invention aims to provide a household socket capable of preventing mistaken touch, wherein an elliptical block is fixedly connected with one end of a round rod, a baffle plate can shield a socket on a seat body, so that liquid is prevented from entering the socket of the seat body when a child carelessly sprays liquid on the seat body, the mistaken touch of the child on the socket of the seat body is avoided, the baffle plate is directly opened, the round rod can drive the elliptical block to rotate by the baffle plate, the elliptical block presses a button to cut off the power of the seat body, the mistaken touch of the child is avoided, and the possibility of danger caused by the mistaken touch of the socket by the child is favorably reduced.

The purpose of the invention can be realized by the following technical scheme:

a household socket capable of preventing mistaken touch comprises a plug-in module and an adjusting module, wherein the plug-in module comprises a base body, connecting rods are rotatably connected to the inner side surfaces of two sides of the top of the base body, three baffle plates which are in contact with the inner side surface of the top of the base body are rotatably connected to the side surfaces of the connecting rods, a button is arranged on one side of the top surface of the base body and is communicated with an internal circuit of the base body, clamping blocks fixedly connected with the side surfaces of the adjacent connecting rods are arranged on the side surfaces of two sides of each baffle plate, and clamping rods which are slidably connected with the side surfaces of the clamping blocks are slidably connected to the side surfaces of two sides of each baffle plate;

the adjusting module comprises a shell, the bottom surface of the shell is fixedly connected with one side of the top surface of the base body, a first winding rod fixedly connected with one end of an adjacent connecting rod is rotatably connected with the two sides of the inner side surface of the shell, a round rod is arranged on a corresponding button inside the shell, one end of the round rod is fixedly connected with an oval block contacted with the top of the button, a second winding rod fixedly connected with the other end of the round rod is rotatably connected with the inner side surface of the shell, a connecting wire is fixedly connected with one side of the winding rod, and one end of the connecting wire is wound on the second winding rod.

The button is connected with the internal circuit of the seat body, press the button and can connect the socket of the seat body, press the button again and can cut off the power of the socket of the seat body, the baffle can shelter from the socket on the seat body, when children carelessly sprinkle liquid on the seat body, the baffle can avoid the liquid to enter the socket of the seat body, simultaneously avoid children to directly mistakenly touch the socket of the seat body, can upwards rotate the baffle, after staggering at clamping rod one end and seat body top medial surface, can remove the clamping rod, break away from the clamping rod and adjacent clamping block, at this moment, the baffle continues upwards to rotate and will not make the connecting rod rotate, after opening the baffle, can inject the joint of electrical apparatus into the socket on the seat body, thereby carry out the normal use of the socket, and when children directly pull open the baffle because of curiosity, the baffle can make the connecting rod rotate through clamping rod and clamping block, the connecting rod can drive the first rolling rod to rotate, make the rolling rod receive the connecting wire, make the rolling rod release from the second rolling rod rotate, thereby drive the oval pole and rotate with the oval block rotation, the button will be pressed downwards, make the button, thereby it is favorable to reduce the possibility that children touch the socket by mistake, and the children.

Further, the method comprises the following steps: one side sliding connection that the baffle top surface deviates from the connecting rod has the slide bar, and is located two screens pole top surfaces on same baffle and all with adjacent slide bar bottom surface fixed connection, can remove two screens poles on the same baffle through the slide bar, and can pull up the baffle through the slide bar.

Further, the method comprises the following steps: the spread groove has all been seted up to two sides of baffle, spread groove medial surface sliding connection have with adjacent screens pole side fixed connection's stopper, spread groove side fixed connection has with adjacent stopper side fixed connection's spring one, and the stopper can restrict the moving direction of screens pole, avoids screens pole and baffle to break away from, under the effect of spring one, can make the stopper support in the inside one end of spread groove to keep away from the removal of screens piece for the screens pole and provide certain resistance, when avoiding children to pull open the baffle, the accident breaks away from screens pole and screens piece.

Further, the method comprises the following steps: the other end of the round rod is rotatably connected with a supporting block which is rotatably connected with the second rolling rod, the bottom surface of the supporting block is fixedly connected with the top surface of the seat body, and the supporting block can support and limit the round rod.

Further, the method comprises the following steps: the pressing frame is fixedly connected with an extrusion block in contact with the top of the button, the pressing frame can be pressed down, the button is pressed downwards through the extrusion block by the pressing frame, and the base body is conveniently and directly powered on and off.

Further, the method comprises the following steps: the utility model discloses a round bar, including casing, pedestal, sliding block, splicing rod one, round bar, splicing groove one, splicing rod one, spring two, can make splicing rod one support on the round bar, draw the baffle open at children, when making the round bar rotate, splicing groove one on the round bar rotates the splicing rod one position after, under the effect of spring two, can make splicing rod one inject the splicing groove one in, restriction oval piece's rotation.

Further, the method comprises the following steps: the pressing frame is characterized in that a second insertion groove is formed in the bottom of the side face of the pressing frame, the sliding block corresponds to the second insertion groove and is fixedly connected with a second insertion rod, when the first insertion groove moves, the sliding block pushes the second insertion rod to move, the second insertion rod is inserted into the second insertion groove, the pressing frame is limited from moving downwards, the press frame is prevented from pressing a button, the socket of the base body is connected with electricity again, when the base body is not used, the button is pressed through the pressing frame, the base body is powered off, the second winding rod is rotated, the first insertion groove in the round rod corresponds to the first insertion rod, the first insertion rod is inserted into the first insertion groove, the second insertion rod is inserted into the second insertion groove, the press frame is limited from moving downwards, the child is prevented from being touched by mistake, and meanwhile, when the base body is in a non-electrified state, the child opens the baffle, the button is pressed again, and the base body is electrified.

Further, the method comprises the following steps: the sliding block deviates from the side fixedly connected with pull rod of insertion rod one, pull rod side and fixed frame medial surface sliding connection, and pull rod side and casing side sliding connection, accessible pull rod pulling sliding block, break away from insertion rod one and inserting groove one to break away from insertion rod two and inserting groove two, then can rotate the round bar, make insertion rod one misplace with inserting groove once more, insertion rod one will support on the round bar, make insertion rod two keep breaking away from with inserting groove two, then the accessible is pressed the frame and is normally pressed the button, switch on the interface of pedestal, normal use pedestal once more.

The invention has the beneficial effects that:

1. the oval block is fixedly connected with one end of the round rod, the baffle can shield the plug port on the seat body, so that when children carelessly spray liquid on the seat body, the liquid enters the plug port of the seat body, meanwhile, the children are prevented from mistakenly touching the plug port of the seat body, the baffle is directly opened, the baffle can enable the connecting rod to rotate through the clamping rod and the clamping block, the round rod drives the oval block to rotate, the oval block presses the button, the seat body is powered off, the children are prevented from mistakenly touching, and the possibility that the children mistakenly touch the socket to cause danger is favorably reduced;

2. through sliding block side fixedly connected with peg rod one, when the picture peg was not used, can press the button, directly cut off the power supply with the pedestal, can rotate the round bar through two rolling rod at this moment, make the inserting groove correspond peg rod one, at this moment under the effect of spring two, can make peg rod one inject in the inserting groove one, and make peg rod two inject in the inserting groove two, the restriction oval piece with press the position of frame, can prevent like this to press the frame and press, avoid children to touch by mistake and switch on the pedestal once more.

Drawings

The invention is further described below with reference to the accompanying drawings.

FIG. 1 is a schematic view of the overall structure of a household anti-accidental-touch socket of the present invention;

FIG. 2 is a schematic view of the seat structure of the present invention;

FIG. 3 is a schematic view of the baffle structure of the present invention;

FIG. 4 is a schematic view of the internal structure of the conditioning module of the present invention;

FIG. 5 is a schematic bottom view of the interior of the housing of the present invention;

FIG. 6 is a schematic view of a round bar structure in the present invention;

fig. 7 is a schematic view of the internal structure of the fixing frame in the present invention.

In the figure: 100. a plug-in module; 110. a base body; 120. a baffle plate; 121. a position clamping rod; 122. a slide bar; 123. connecting grooves; 124. a first spring; 125. a limiting block; 130. a connecting rod; 140. a bit block; 150. a button; 200. an adjustment module; 210. a housing; 220. a first winding rod; 230. a round bar; 231. an elliptical block; 232. a second winding rod; 233. a support block; 234. a first inserting groove; 240. pressing the frame; 241. extruding the block; 242. a second inserting groove; 250. a fixing frame; 251. a slider; 252. a first inserting rod; 253. a second inserting rod; 254. a second spring; 255. a pull rod; 260. and connecting the wires.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Please refer to fig. 1-7, which illustrate a household socket for preventing accidental contact, comprising a plugging module 100 and an adjusting module 200, wherein the plugging module 100 comprises a base 110, the inner sides of the two sides of the top of the base 110 are rotatably connected with connecting rods 130, the sides of the connecting rods 130 are rotatably connected with three baffles 120 contacting with the inner side of the top of the base 110, one side of the top of the base 110 is provided with a button 150, the button 150 is conducted with the internal circuit of the base 110, the sides of the two sides of the baffles 120 are respectively provided with clamping blocks 140 fixedly connected with the sides of the adjacent connecting rods 130, and the sides of the two sides of the baffles 120 are respectively connected with clamping rods 121 slidably connected with the sides of the clamping blocks 140;

the adjusting module 200 includes a housing 210, a bottom surface of the housing 210 is fixedly connected to one side of a top surface of the base 110, a first rolling rod 220 fixedly connected to one end of the adjacent connecting rod 130 is rotatably connected to two sides of an inner side surface of the housing 210, a round rod 230 is arranged inside the housing 210 corresponding to the button 150, an oval block 231 in contact with the top of the button 150 is fixedly connected to one end of the round rod 230, a second rolling rod 232 rotatably connected to the other end of the round rod 230 is fixedly connected to the inner side surface of the housing 210, a connecting wire 260 is fixedly connected to one side of the first rolling rod 220, and one end of the connecting wire 260 is wound on the second rolling rod 232.

The button 150 is connected with an internal circuit of the seat body 110, the socket of the seat body 110 can be connected with electricity by pressing the button 150, the socket of the seat body 110 can be powered off by pressing the button 150 again, the baffle 120 can shield the socket on the seat body 110, when a child carelessly sprinkles liquid on the seat body 110, the baffle 120 can prevent the liquid from entering the socket of the seat body 110, meanwhile, the child can be prevented from directly and mistakenly touching the socket of the seat body 110, the baffle 120 can be rotated upwards, after one end of the clamping rod 121 is staggered with the inner side surface of the top of the seat body 110, the clamping rod 121 can be moved, the clamping rod 121 is separated from the adjacent clamping block 140, at the moment, the baffle 120 continues to rotate upwards, the connecting rod 130 cannot be rotated, after the baffle 120 is opened, the connector of an electric appliance can be inserted into the socket on the seat body 110, thereby carrying out normal use of the socket, when the child directly pulls the baffle 120 open curiously, the baffle 120 can drive the connecting rod 130 to rotate with the clamping block 121 and the connecting rod 130 through the clamping rod 130, the connecting rod 130 can drive the rolling rod 220 to rotate, thereby reducing the possibility that the rolling rod 150 rotates when the rolling rod 150 and the rolling rod 232, thereby, the rolling rod 150 and the rolling rod 150 can be pressed down, the elliptical pressing the elliptical push button 150.

One side of the top surface of the baffle 120, which is away from the connecting rod 130, is slidably connected with a sliding rod 122, the top surfaces of two clamping rods 121 on the same baffle 120 are fixedly connected with the bottom surfaces of the adjacent sliding rods 122, the two clamping rods 121 on the same baffle 120 can be moved through the sliding rod 122, and the baffle 120 can be pulled up through the sliding rod 122.

Connecting groove 123 has all been seted up to two sides of baffle 120, connecting groove 123 medial surface sliding connection has stopper 125 with adjacent screens pole 121 side fixed connection, connecting groove 123 side fixed connection has the spring 124 with adjacent stopper 125 side fixed connection, stopper 125 can restrict the moving direction of screens pole 121, avoid screens pole 121 and baffle 120 to break away from, under the effect of spring 124, can make stopper 125 support at the inside one end of connecting groove 123, thereby provide certain resistance for the removal that screens pole 121 kept away from screens piece 140, when avoiding children to pull open baffle 120, the accident breaks away from screens pole 121 and screens piece 140.

The other end of the round rod 230 is rotatably connected with a supporting block 233 which is rotatably connected with the second rolling rod 232, the bottom surface of the supporting block 233 is fixedly connected with the top surface of the seat body 110, and the supporting block 233 can support and limit the round rod 230.

The top of the inner side of the housing 210 is slidably connected with a pressing frame 240, the bottom surface of the pressing frame 240 is fixedly connected with an extrusion block 241 contacting with the top of the button 150, the pressing frame 240 can be pressed, and the pressing frame 240 presses the button 150 downwards through the extrusion block 241, so that the base 110 is directly powered on or off.

A fixing frame 250 fixedly connected with the top surface of the base body 110 is arranged on one side of the pressing frame 240 in the shell 210, a sliding block 251 is slidably connected with the inner side surface of the fixing frame 250, a spring two 254 fixedly connected with the inner side surface of the fixing frame 250 is fixedly connected with the side surface of the sliding block 251, a plugging slot one 234 is formed in one side surface of the round rod 230, which deviates from the sliding block 251, a plugging rod one 252 is fixedly connected with the side surface of the sliding block 251, which corresponds to the plugging slot one 234, one end of the plugging rod one 252 is contacted with one end of the round rod 230, the plugging rod one 252 can be supported on the round rod 230 under the action of the spring two 254, when a child pulls the baffle plate 120 open, so that the plugging slot one 234 on the round rod 230 rotates to the plugging rod one 252, and then the plugging rod one 252 can be inserted into the plugging slot one 234 under the action of the spring two 254, so as to limit the rotation of the oval block 231.

When the base body 110 is not used, the button 150 can be pressed by the pressing frame 240 to cut off the power of the base body 110, and the rolling rod 232 is rotated to enable the first insertion groove 234 on the round rod 230 to correspond to the first insertion rod 252, so that the first insertion rod 252 is inserted into the first insertion groove 242, the first insertion groove 242 is limited from moving downwards, the first insertion rod 252 is inserted into the first insertion groove 234, the second insertion rod 253 is inserted into the second insertion groove 242, the pressing frame 240 is limited from moving downwards, the child is prevented from mistakenly touching the baffle 120, the button 150 is pressed again, and the power of the base body 110 is turned on.

The side of the sliding block 251, which is away from the first plugging rod 252, is fixedly connected with a pull rod 255, the side of the pull rod 255 is slidably connected with the inner side of the fixed frame 250, the side of the pull rod 255 is slidably connected with the side of the shell 210, the pull rod 255 can pull the sliding block 251 to separate the first plugging rod 252 from the first plugging groove 234, the second plugging rod 253 is separated from the second plugging groove 242, then the round rod 230 can be rotated to make the first plugging rod 252 dislocated with the first plugging groove 234 again, the first plugging rod 252 is abutted against the round rod 230 to make the second plugging rod 253 separated from the second plugging groove 242, and then the button 150 can be normally pressed by pressing the frame 240 to electrify the plugging port of the seat body 110, so that the seat body 110 can be normally used again.

The working principle is as follows: when the electric appliance connector is used, the pressing frame 240 can be pressed, the pressing frame 240 can press the button 150 through the pressing block 241, so that the socket of the seat body 110 is electrified, then the baffle 120 can be pulled upwards through the sliding rod 122, so that the baffle 120 rotates upwards, after the sliding rod 122 is staggered with the inner side surface of the top of the seat body 110, the sliding rod 122 can be shifted, so that the sliding rod 122 drives the clamping rod 121 to move away from the clamping block 140, after the clamping rod 121 is separated from the clamping block 140, the clamping block 140 rotates downwards to the original position, at the moment, the baffle 120 can continue to rotate upwards, the baffle 120 is opened, and at the moment, the connector of an electric appliance can be inserted into the socket on the seat body 110;

when a child pulls the baffle 120 open directly, and the baffle 120 rotates upward, the baffle 120 can rotate the clamping block 140 upward through the clamping rod 121, drive the connecting rod 130 to rotate, the connecting rod 130 can drive the first winding rod 220 to rotate, and the first winding rod 220 winds the connecting wire 260 thereon, so that the second winding rod 232 can rotate to release the connecting wire 260, the second winding rod 232 can drive the circular rod 230 and the elliptical block 231 to rotate, the elliptical block 231 rotates to press the button 150 downward, so that the button 150 is pressed down, the socket of the seat body 110 is powered off, and after the first socket 234 on the circular rod 230 rotates to the first socket 252 position, under the action of the second spring 254, the sliding block 251 can drive the first socket 252 to move towards the first socket 234, so that the first socket 252 is inserted into the first socket 234, and the second socket 253 is inserted into the second socket 242, so as to limit the rotation of the elliptical block 231, and limit the downward movement of the pressing frame 240, and avoid pressing the button 150 to press the socket 240 of the seat body 110 again;

the sliding block 251 can be pulled by the pull rod 255 to separate the first plug rod 252 from the first plug groove 234 and separate the second plug rod 253 from the second plug groove 242, at this time, the round rod 230 can be directly rotated to dislocate the first plug rod 252 from the first plug groove 234 again, the first plug rod 252 can be abutted against the round rod 230 to keep the second plug rod 253 separated from the second plug groove 242, at this time, the pressing frame 240 can be normally pressed to press the button 150, and the socket of the seat body 110 is powered on;

when the base 110 is not used, the pressing frame 240 can be pressed down to press the button 150, the base 110 is powered off, the rolling rod II 232 is rotated to rotate the round rod 230, the first plug-in groove 234 on the round rod 230 corresponds to the first plug-in rod 252, the first plug-in rod 252 is inserted into the first plug-in groove 234, the second plug-in rod 253 is inserted into the second plug-in groove 242, the pressing frame 240 is limited from moving downwards, the child is prevented from touching the pressing frame 240 by mistake, meanwhile, when the base 110 is in a non-power-on state, the child is prevented from opening the baffle 120, the rolling rod I220 drives the rolling rod II 232 to rotate through the connecting wire 260, the button 150 is pressed down, and the base 110 is powered on.

In the description herein, references to the description of "one embodiment," "an example," "a specific example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The foregoing is illustrative and explanatory only, and it will be appreciated by those skilled in the art that various modifications, additions and substitutions can be made to the embodiments described without departing from the scope of the invention as defined in the appended claims.

Claims

1. The household socket capable of preventing the accidental touch is characterized by comprising a plug-in module (100) and an adjusting module (200), wherein the plug-in module (100) comprises a base body (110), the inner sides of the two sides of the top of the base body (110) are rotatably connected with connecting rods (130), the side surfaces of the connecting rods (130) are rotatably connected with three baffle plates (120) which are in contact with the inner side of the top of the base body (110), one side of the top surface of the base body (110) is provided with a button (150), the button (150) is communicated with an internal circuit of the base body (110), the side surfaces of the two sides of each baffle plate (120) are respectively provided with a clamping block (140) fixedly connected with the side surface of the adjacent connecting rod (130), and the side surfaces of the two sides of each baffle plate (120) are respectively and slidably connected with a clamping rod (121) slidably connected with the side surface of each clamping block (140);

adjusting module (200) is including casing (210), casing (210) bottom surface and pedestal (110) top surface one side fixed connection, casing (210) medial surface both sides are all rotated and are connected with rolling rod one (220) with adjacent connecting rod (130) one end fixed connection, casing (210) is inside to be provided with pole (230) corresponding button (150), pole (230) one end fixedly connected with and button (150) top contact's ellipse piece (231), pole (230) other end fixedly connected with rotates two (232) of rolling rod of being connected with casing (210) medial surface, rolling rod one (220) side fixedly connected with connecting wire (260), and connecting wire (260) one end is convoluteed on rolling rod two (232).

2. The household socket for preventing accidental touch according to claim 1, wherein a sliding rod (122) is slidably connected to a side of the top surface of the baffle (120) away from the connecting rod (130), and the top surfaces of two clamping rods (121) on the same baffle (120) are fixedly connected to the bottom surfaces of the adjacent sliding rods (122).

3. The household socket for preventing accidental touch according to claim 1, wherein the two side surfaces of the baffle (120) are both provided with a connecting groove (123), the inner side surface of the connecting groove (123) is slidably connected with a limiting block (125) fixedly connected with the side surface of the adjacent clamping rod (121), and the side surface of the connecting groove (123) is fixedly connected with a first spring (124) fixedly connected with the side surface of the adjacent limiting block (125).

4. The household socket for preventing accidental touch according to claim 1, wherein the other end of the round rod (230) is rotatably connected with a supporting block (233) which is rotatably connected with a second rolling rod (232), and the bottom surface of the supporting block (233) is fixedly connected with the top surface of the base body (110).

5. The household accidental touch preventing socket as claimed in claim 1, wherein a pressing frame (240) is slidably connected to the top of the inner side surface of the housing (210), and a pressing block (241) in contact with the top of the button (150) is fixedly connected to the bottom surface of the pressing frame (240).

6. The household socket for preventing accidental touch according to claim 5, wherein a fixed frame (250) fixedly connected with the top surface of the base body (110) is arranged on one side of the pressing frame (240) inside the housing (210), a sliding block (251) is slidably connected to the inner side surface of the fixed frame (250), a second spring (254) fixedly connected with the inner side surface of the fixed frame (250) is fixedly connected to the side surface of the sliding block (251), a first insertion groove (234) is formed in one side of the round rod (230) facing away from the sliding block (251), a first insertion rod (252) is fixedly connected to the side surface of the sliding block (251) corresponding to the first insertion groove (234), and one end of the first insertion rod (252) is in contact with one end of the round rod (230).

7. The household socket for preventing the accidental touch as claimed in claim 6, wherein a second insertion groove (242) is formed at the bottom of the side surface of the pressing frame (240), and a second insertion rod (253) is fixedly connected to the sliding block (251) corresponding to the second insertion groove (242).

8. The household accidental touch prevention socket as claimed in claim 6, wherein a pull rod (255) is fixedly connected to the side of the sliding block (251) away from the first plug rod (252), the side of the pull rod (255) is slidably connected with the inner side of the fixed frame (250), and the side of the pull rod (255) is slidably connected with the side of the shell (210).