CN114985320A

CN114985320A - Photoelectric travel limit switch

Info

Publication number: CN114985320A
Application number: CN202210551898.6A
Authority: CN
Inventors: 解正云; 司琪
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-05-18
Filing date: 2022-05-18
Publication date: 2022-09-02

Abstract

The invention relates to the technical field of photoelectric switches, in particular to a photoelectric travel limit switch which comprises a shell fixedly arranged on an emitting surface of a photoelectric switch body, wherein a semicircular groove is formed in one side, away from the photoelectric switch body, of the shell, a motor is fixedly connected to the middle inside the shell, a lens is fixedly arranged on an output shaft of the motor, the lens is circular, a first fixing plate is fixedly arranged on the inner wall, away from the photoelectric switch body, of the shell through a plurality of first springs, a first hairbrush plate is fixedly arranged at one end, close to the lens, of the first fixing plate, the first springs are transversely and horizontally fixedly arranged on the inner wall, away from the photoelectric switch body, of the shell, and a second fixing plate is fixedly arranged at the upper end of the inner side wall of the shell through a second spring. According to the invention, the first spring is matched with the first fixing plate and the brush plate, so that the bristles on the brush plate are always in contact with the lens, and when the motor drives the lens to rotate, the bristles on the brush plate can stably clean dust and dirt on the lens, thereby improving the overall stability.

Description

Photoelectric travel limit switch

Technical Field

The invention relates to the technical field of photoelectric switches, in particular to a photoelectric travel limit switch.

Background

The photoelectric switch is a short-term photoelectric proximity switch, and detects the existence of an object by utilizing the shielding or reflection of the detected object to a light beam and switching on a circuit through a synchronous circuit. The object is not limited to metal, and all objects that reflect light (or block light) can be detected. The photoelectric switch converts the input current into an optical signal on the transmitter to be emitted, and the receiver detects the target object according to the intensity or the existence of the received light. A common photoelectric switch smoke alarm in a security system is frequently used in the industry for counting the movement times of a mechanical arm.

The photoelectric switch has certain requirements on the working environment, and avoids the following conditions as much as possible: places with more dust; locations with high levels of corrosive gases; places where water, oil, chemicals are likely to splash directly; outdoor or sunlight and other places with strong light direct irradiation but no shading measure; locations where the ambient temperature variation is outside the product specification range; vibration and impact are large, and shock-proof measures are not taken; these operating environments may cause malfunction of the photoelectric switch.

However, some working environments with large dust and dust may need to use the photoelectric switch, such as a flour mill, a stone processing factory, etc., but the photoelectric switch may have dust and dust adhered to the photoelectric switch when working for a long time, so that infrared light is affected and the use of the photoelectric switch is affected.

Therefore, a photoelectric travel limit switch is provided.

Disclosure of Invention

The invention aims to provide a photoelectric travel limit switch, which is used for cleaning away dirty substances such as dust and dirt attached to a lens by arranging a brush plate, a rotating roller and a magic sponge in a matching manner so as to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme:

the utility model provides a photoelectricity travel limit switch, includes, photoelectricity switch body and the equipment of brushing supporting with the photoelectricity switch body, the equipment of brushing includes:

the photoelectric switch comprises a shell, a photoelectric switch body and a control circuit, wherein the shell is fixedly arranged on the emitting surface of the photoelectric switch body, and a semicircular groove is formed in one side of the shell, which is far away from the photoelectric switch body;

the motor is fixedly connected with the middle inside the shell;

the lens is fixedly arranged on the output shaft of the motor and is circular;

further comprising:

and the shell is fixedly provided with a brushing device on the inner wall of one side, away from the photoelectric switch body.

The cleaning device comprises a first fixing plate fixedly installed on the inner wall of one side, far away from the photoelectric switch body, of the shell through a plurality of springs, and a brush plate is fixedly installed at one end, close to the lens, of the first fixing plate.

And the springs are horizontally and fixedly arranged on the inner wall of one side of the shell far away from the photoelectric switch body.

The utility model discloses a water storage device, including shell, fixed plate, water pipe, motor, water storage box, hose, solenoid valve, motor, water pipe and motor, two fixed plate two fixed connection connecting rods are passed through to the inside lateral wall upper end of shell, the equal fixedly connected with connecting rod in two ends of fixed plate, two rotate jointly between the connecting rod and be connected with the commentaries on classics roller, the outer parcel of commentaries on classics roller has one deck magic sponge, and is ninety degree right angle between two fixed plates and the fixed plate, shell top inner wall is equipped with the water storage box, change the inside water pipe that is equipped with of roller, and be close to the connecting rod internal fixation who water storage box one end and have the sleeve pipe, the water storage box is external to have the hose, the hose passes connecting rod and sleeve pipe fixed connection, and the sheathed tube other end rotates with the water pipe to be connected, be equipped with the solenoid valve on the hose, solenoid valve and motor electric connection, a plurality of pores have been seted up jointly with the commentaries on classics roller to the water pipe.

The water solution in the water storage box is glass water.

The shell is close to photoelectric switch body inner wall and has seted up two slides relatively photoelectric switch body symmetry, be equipped with on the photoelectric switch body and be used for the convenient fixing device fixed with the shell, and convenient fixing device and slide cooperation.

Convenient fixing device includes two telescopic links of fixed mounting on photoelectric switch body both sides, two all be connected with the extrusion head, two through spring three on the telescopic link the extrusion head is mutually supported with the slide, be equipped with the bayonet socket of mutually supporting with two telescopic links on the shell inner wall, two the bayonet socket all is located the slide.

A first rubber pad is arranged between each of the two sides of the photoelectric switch body and the shell, and the first rubber pads are matched with the slide ways.

And a second rubber pad matched with the semicircular groove is fixedly arranged on the inner wall of the semicircular groove of the shell.

The lens material is high-transmittance acrylic material.

Compared with the prior art, the invention has the following beneficial effects:

1. according to the photoelectric travel limit switch, the first spring is matched with the first fixing plate and the brush plate, so that the bristles on the brush plate are always in contact with the lens, when the motor drives the lens to rotate, the bristles on the brush plate can stably clean dust and dirt on the lens, and the overall stability is improved.

2. According to the photoelectric travel limit switch, the rotating roller and the magic sponge are arranged, so that the rotating roller rotates under the action of friction force between the rotating roller and the lens, the magic sponge is driven to rotate to preliminarily clean dust and dust adhered to the lens, and the magic sponge is soaked by aqueous solution to further soak the lens, so that a brush plate can better clean the dust and the dust on the lens when the lens is cleaned, and the use stability of the photoelectric switch body is further improved.

3. According to the photoelectric travel limit switch, the rubber pad II matched with the semicircular groove is fixedly arranged on the inner wall of the shell where the semicircular groove is formed, so that external dust and dirt cannot enter the shell through the gap of the semicircular groove, the dust and the dirt are prevented from entering and influencing the integral operation of equipment, and the integral sealing performance and stability are further improved.

Drawings

FIG. 1 is a perspective view of the present invention;

FIG. 2 is a partial cross-sectional view of the present invention;

FIG. 3 is a side cross-sectional view of the present invention;

FIG. 4 is a top cross-sectional view of the present invention;

FIG. 5 is a front cross-sectional view of the present invention;

FIG. 6 is an enlarged view taken at A of FIG. 2 in accordance with the present invention;

FIG. 7 is an enlarged view of the invention at B of FIG. 3;

FIG. 8 is an enlarged view taken at C of FIG. 4 in accordance with the present invention;

FIG. 9 is an enlarged view taken at D of FIG. 7 according to the present invention.

In the figure: 1. a photoelectric switch body; 2. a housing; 3. a motor; 4. a lens; 5. a first spring; 6. a first fixing plate; 7. a brush plate; 8. a second spring; 9. a second fixing plate; 10. a connecting rod; 11. rotating the roller; 12. a water storage box; 13. a water pipe; 14. fine pores; 15. an electromagnetic valve; 16. a slideway; 17. a telescopic rod; 18. a third spring; 19. an extrusion head; 20. a bayonet; 21. a first rubber pad; 22. a second rubber pad; 23. a sleeve.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in 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.

Referring to fig. 1 to 9, the present invention provides a photoelectric travel limit switch, which has the following technical scheme:

the utility model provides a photoelectric travel limit switch, includes, photoelectric switch body 1 and with the supporting equipment of brushing of photoelectric switch body 1, the equipment of brushing includes:

the photoelectric switch comprises a shell 2, wherein the shell 2 is fixedly arranged on the emitting surface of a photoelectric switch body 1, and a semicircular groove is formed in one side, away from the photoelectric switch body 1, of the shell 2;

the motor 3 is fixedly connected in the middle inside the shell 2;

the lens 4 is fixedly arranged on an output shaft of the motor 3, and the lens 4 is circular;

further comprising:

the inner wall of one side of the shell 2, which is far away from the photoelectric switch body 1, is fixedly provided with a brushing device.

When the photoelectric switch is used, firstly, a worker turns on the photoelectric switch body 1, light beams emitted by the photoelectric switch body 1 from an emitting surface penetrate through the lens 4 and the semicircular groove to be matched with external equipment to normally work, when the part of the lens 4, which is right opposite to the semicircular groove, is dirty and the normal work of the photoelectric travel limit switch is influenced, the motor 3 is operated to start, the lens 4 at the semicircular groove is a working surface, the motor 3 rotates to drive the lens 4 to transfer the dirty working surface into the shell 2, the clean surface is transferred to the semicircular groove to serve as a new working surface, the normal work of the photoelectric switch body 1 is not influenced, and when the dirty working surface of the lens 4 is transferred into the shell 2, the cleaning device starts to work and cleans substances such as dust and the like attached to the lens 4;

photoelectric switch body 1 should avoid using in dust, the more operational environment of dust as far as possible, because can have an effect to photoelectric switch body 1's use under the more operational environment of dust, nevertheless through setting up the device of brushing, can let photoelectric switch body 1 stable work under the more operational environment of dust, improved photoelectric switch body 1's stability.

As an embodiment of the invention, the cleaning device comprises a fixing plate I6 which is fixedly arranged on the inner wall of the side, far away from the photoelectric switch body 1, of the shell 2 through a plurality of springs I5, and a brush plate 7 is fixedly arranged at one end, close to the lens 4, of the fixing plate I6.

A plurality of springs 5 are because the elasticity of self, make brush board 7 support lens 4, let brush hair on brush board 7 and lens 4 contact, when motor 3 drives lens 4 and rotates, motor 3 drives the dirty working face entering shell 2 of lens 4, during the rotation, brush hair on brush board 7 is the dust of adhesion on lens 4, the dust is cleared away, do preparation for switching the working face next time, through setting up spring 5 and fixed plate 6, brush board 7 cooperates, make brush hair on brush board 7 all contact with lens 4 all the time, when motor 3 drives lens 4 and rotates, brush hair on brush board 7 can be stable dust on lens 4, the dust is given and is brushed away, holistic stability has been improved.

In one embodiment of the present invention, a plurality of springs one 5 are horizontally and fixedly installed in the inner wall of the side far away from the optoelectronic switch body 1 in the housing 2.

The springs 5 are all rectangular springs, the transverse force given to the springs 5 when the lens 4 rotates is not enough to deform the rectangular springs, and the lens 4 does not rotate all the time and does not give the springs 5 the transverse force all the time;

a plurality of springs 5 horizontal fixed mounting on 2 inner walls of shell, and then fixed plate 6, brush board 7 is in the horizontality, when motor 3 drives lens 4 and rotates, brush hair on brush board 7 is the dust on lens 4, the dust please brush, most of dust, the dust drops in shell 2, there are some dust, the dust can the adhesion on the brush hair on brush board 7, it can influence follow-up clear brush lens 4's effect too much to pile up, place through setting up brush board 7 level, dust on brush board 7, the dust when dust is piled up when too much, drop because of the gravity of self, brush board 7 level is placed and is avoided piling up too much dust, the dust can't drop, and then influence subsequent effect of cleaning, the stability of brush board 7 cleaning has been improved.

As an implementation mode of the invention, a second fixing plate 9 is fixedly installed at the upper end of the inner side wall of a shell 2 through a second spring 8, two ends of the second fixing plate 9 are fixedly connected with connecting rods 10, a rotating roller 11 is connected between the two connecting rods 10 in a rotating mode, a layer of magic sponge wraps the rotating roller 11, a right angle between the second fixing plate 9 and a first fixing plate 6 is formed, a water storage box 12 is arranged on the inner wall of the top of the shell 2, a water pipe 13 is arranged inside the rotating roller 11, a sleeve 23 is fixedly installed inside the connecting rod 10 close to one end of the water storage box 12, a hose is externally connected with the water storage box 12, the hose penetrates through the connecting rod 10 to be fixedly connected with the sleeve 23, the other end of the sleeve 23 is rotatably connected with the water pipe 13, an electromagnetic valve 15 is arranged on the hose, the electromagnetic valve 15 is electrically connected with a motor 3, and the water pipe 13 and the rotating roller 11 are jointly provided with a plurality of fine holes 14.

The second springs 8 are rectangular springs, the transverse force applied to the second springs 8 when the lens 4 rotates is not enough to deform the rectangular springs, and the lens 4 does not rotate all the time and does not apply the transverse force to the second springs 8 all the time;

the damping bearing is arranged at the rotating connection position of the rotating roller 11 and the connecting rod 10, and the damping bearing is subjected to resistance during rotation, so that the rotation of the rotating roller 11 and the movement of the contact surface of the lens 4 are asynchronous, and relative sliding is generated between the rotating roller 11 and the contact surface of the lens 4, thereby avoiding that the rotating roller 11 rotates under the action of friction force and can be moved synchronously with the surface of the lens 4 in contact without relative sliding, and dust on the surface of the lens 4 are difficult to effectively clean;

the second springs 8 enable the rotating roller 11 to abut against the lens 4 due to the elasticity of the second springs, and when the motor 3 is started due to the anticlockwise rotation of the lens 4, the motor 3 gives an electric signal to the electromagnetic valve 15, the electromagnetic valve 15 is opened for one second and then closed, the water solution in the water storage box 12 flows into the water pipe 13 in the rotating roller 11 through the hose and then flows out of the magic sponge through the plurality of pores 14 to soak the magic sponge, when the motor 3 drives the lens 4 to rotate, because of the friction force between the roller 11 and the lens 4, the roller 11 rotates to drive the magic sponge to rotate to primarily clean the dust and dirt adhered on the lens 4, and because the magic sponge is soaked by the water solution, and then soak lens 4 for dust, dust on brush board 7 ability better brush lens 4 when brushing lens 4, further improve the stability that photoelectric switch body 1 used.

In one embodiment of the present invention, the aqueous solution inside the water storage box 12 is glass water.

Glass water mainly comprises water, alcohol, ethylene glycol, corrosion inhibitor and multiple surfactants, is glass water through setting up the inside aqueous solution of water storage box 12, and after soaking the magic sponge, the roller 11 drives the magic sponge and cleans lens 4, soaks lens 4, compares in ordinary water, and glass water can reach better effect when cleaning the surface for brush board 7 can be better when cleaning lens 4 clean the dust, the dust of lens 4 surface adhesion, further improved stability.

As an embodiment of the present invention, two slide ways 16 are symmetrically disposed on the inner wall of the casing 2 close to the photoelectric switch body 1 relative to the photoelectric switch body 1, and a convenient fixing device for fixing the casing 2 is disposed on the photoelectric switch body 1 and is matched with the slide ways 16.

In the installation, aim at two slides 16 to convenient fixing device, down press photoelectric switch body 1, photoelectric switch body 1 slides in slide 16, convenient fixing device fixes photoelectric switch body 1 and shell 2 afterwards, nevertheless want the convenient quick dismantlement of the convenient fixing device of accessible when dismantling shell 2, through setting up slide 16, make can more conveniently let convenient fixing device fix photoelectric switch body 1 and shell 2, and photoelectric switch body 1 and shell 2 after-separating, dust in clearance slide 16 that can be convenient, the dust, the convenience of installation has been improved.

As an embodiment of the invention, the convenient fixing device comprises two telescopic rods 17 fixedly installed on two sides of the photoelectric switch body 1, the two telescopic rods 17 are both connected with extrusion heads 19 through springs 18, the two extrusion heads 19 are mutually matched with the slide way 16, bayonets 20 mutually matched with the two telescopic rods 17 are arranged on the inner wall of the shell 2, and the two bayonets 20 are both positioned on the slide way 16.

In the installation process, the two telescopic rods 17 are respectively aligned to the two slideways 16, the photoelectric switch body 1 is pressed downwards, the two extrusion heads 19 slide in the slideways 16, the spring III 18 is contracted under the extrusion force of the extrusion heads 19, when the extrusion head 19 slides to the bayonet 20, the spring III 18 pops out to pop the extrusion head 19 into the bayonet 20 for clamping, at this time, the photoelectric switch body 1 and the shell 2 are in a fixed state, when the photoelectric switch body 1 is separated from the shell 2, the photoelectric switch body 1 is grasped and pulled upwards with force, the extrusion head 19 is extruded by the edge of the bayonet 20 to extrude and contract the spring III 18, the extrusion head 19 slides in the slide way 16, the photoelectric switch body 1 is separated from the shell 2, and through the arrangement of the spring III 18, the extrusion head 19 and the bayonet 20, the photoelectric switch body 1 can be conveniently fixed and separated from the shell 2, and the installation convenience is further improved.

In one embodiment of the present invention, rubber pads 21 are disposed between both sides of the optoelectronic switch body 1 and the housing 2, and the rubber pads 21 are engaged with the slide 16.

At the in-process of whole operation, because of the influence of external machine operation, can lead to whole equipment to produce vibration, shake, and then influence motor 3 moving stability, all be equipped with rubber pad 21 between setting up photoelectric switch body 1 both sides and the shell 2 for reduce because of vibration, the shake that the external machine operation produced, and then improved the stability of motor 3 when moving, improved the leakproofness to a certain extent.

As an embodiment of the invention, a second rubber pad 22 matched with the semicircular groove is fixedly arranged on the inner wall of the housing 2 provided with the semicircular groove.

Through setting up on shell 2 sets up the semi-circular groove department inner wall fixed mounting have with the semi-circular groove mutually supporting rubber pad two 22 for outside dust, dust can't enter into shell 2 through the semi-circular groove gap inside, avoid dust, dust to get into the whole operation that influences equipment, and then have further improved holistic leakproofness and stability.

In one embodiment of the present invention, the lens 4 is made of high-transmittance acrylic material.

When the novel multifunctional lens is used, the lens 4 needs to be rubbed with the brush plate 7 for a long time, the acrylic material is good in wear resistance and not easy to break, and the service life of the novel multifunctional lens is longer than that of other materials under severe environment.

The working principle is as follows: before use, a worker aligns the two telescopic rods 17 with the two slide ways 16 respectively, presses the photoelectric switch body 1 downwards, the two extrusion heads 19 slide in the slide ways 16, the springs 18 contract under the extrusion force of the extrusion heads 19, when the extrusion heads 19 slide to the bayonets 20, the springs 18 pop out, the extrusion heads 19 pop into the bayonets 20 to be clamped, at the moment, the photoelectric switch body 1 and the shell 2 are in a fixed state, the photoelectric switch body 1 is opened, when dirt appears on the positions, facing the semicircular grooves, of the lenses 4 and normal work of the photoelectric travel limit switch is influenced, the motor 3 is operated again to be started, the motor 3 rotates to drive the lenses 4 to transfer the dirty working surfaces into the shell 2, the clean surfaces are transferred out of the semicircular grooves, when the motor 3 rotates, because the lenses 4 rotate anticlockwise, when the motor 3 is started, the motor 3 gives an electric signal to the electromagnetic valve 15, the electromagnetic valve 15 is opened for one second and then is closed, glass water in the water storage box 12 passes through the hose inflow and changes the water pipe 13 in the roller 11, on the magic sponge is flowed out to a plurality of pores 14 of rethread, soak the magic sponge, when motor 3 drives lens 4 and rotates, because the frictional force effect between 11 and the lens 4 of commentaries on classics roller, make and follow the rotation of commentaries on classics roller 11, it rotates the dust of adhesion on lens 4 to drive the magic sponge, the dust is given preliminary clearance, and because aqueous solution has soaked the magic sponge, and then give lens 4 and soak, and then brush board 7 is brushed again and is fallen the dust that remains on lens 4 with the preliminary clearance of magic sponge, the dust.

The electric elements in the document are electrically connected with an external main controller and 220V mains supply through a transformer, the main controller can be a conventional known device controlled by a computer and the like, the product model provided by the invention is only used according to the structural characteristics of the product, the product can be adjusted and modified after being purchased, so that the product is more matched with and accords with the technical scheme of the invention, the product model is a technical scheme of the optimal application of the technical scheme, the product model can be replaced and modified according to the required technical parameters, and the product model is familiar to the technical personnel in the field, so that the technical scheme provided by the invention can clearly obtain the corresponding use effect.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a photoelectricity travel limit switch, includes, photoelectric switch body (1) and the equipment of brushing supporting with photoelectric switch body (1), the equipment of brushing includes:

the photoelectric switch comprises a shell (2), wherein the shell (2) is fixedly installed on the emitting surface of the photoelectric switch body (1), and a semicircular groove is formed in one side, away from the photoelectric switch body (1), of the shell (2);

the motor (3) is fixedly connected to the middle inside the shell (2);

the lens (4) is fixedly installed on an output shaft of the motor (3), and the lens (4) is circular;

it is characterized by also comprising:

the cleaning device is fixedly mounted on the inner wall of one side, away from the photoelectric switch body (1), of the shell (2).

2. The photoelectric travel limit switch of claim 1, wherein: the cleaning device comprises a first fixing plate (6) which is fixedly installed in the shell (2) and far away from the inner wall of one side of the photoelectric switch body (1) through a plurality of first springs (5), and a brush plate (7) is fixedly installed at one end, close to the lens (4), of the first fixing plate (6).

3. The photoelectric travel limit switch of claim 2, wherein: and the springs (5) are transversely and horizontally fixedly arranged on the inner wall of one side, far away from the photoelectric switch body (1), in the shell (2).

4. The photoelectric travel limit switch of claim 2, wherein: the upper end of the inner side wall of the shell (2) is fixedly provided with a second fixed plate (9) through a second spring (8), the two ends of the second fixed plate (9) are fixedly connected with a connecting rod (10), the two connecting rods (10) are connected with a rotating roller (11) in a rotating mode, the outer wrapping of the rotating roller (11) is provided with a layer of magic sponge, a ninety-degree right angle is formed between the two fixed plates (9) and the first fixed plate (6), the inner wall of the top of the shell (2) is provided with a water storage box (12), a water pipe (13) is arranged inside the rotating roller (11), a sleeve (23) is fixedly arranged in the connecting rod (10) close to one end of the water storage box (12), the water storage box (12) is externally connected with a hose, the hose penetrates through the connecting rod (10) and the sleeve (23) to be fixedly connected, the other end of the sleeve (23) is rotatably connected with the water pipe (13), and the hose is provided with an electromagnetic valve (15), the electromagnetic valve (15) is electrically connected with the motor (3), and the water pipe (13) and the rotating roller (11) are jointly provided with a plurality of fine holes (14).

5. The photoelectric travel limit switch of claim 4, wherein: the water solution in the water storage box (12) is glass water.

6. The photoelectric travel limit switch of claim 1, wherein: two slides (16) have been seted up to relative photoelectric switch body (1) symmetry in shell (2) are close to photoelectric switch body (1) inner wall, be equipped with on photoelectric switch body (1) and be used for the convenient fixing device fixed with shell (2), and convenient fixing device and slide (16) cooperation.

7. The photoelectric travel limit switch of claim 6, wherein: convenient fixing device includes two telescopic links (17), two of fixed mounting on photoelectric switch body (1) both sides all be connected with extrusion head (19), two through three (18) of spring on telescopic link (17) extrusion head (19) and slide (16) are mutually supported, be equipped with bayonet socket (20) of mutually supporting with two telescopic links (17) on shell (2) inner wall, two bayonet socket (20) all are located slide (16).

8. The photoelectric travel limit switch of claim 6, wherein: a first rubber pad (21) is arranged between each of the two sides of the photoelectric switch body (1) and the shell (2), and the first rubber pads (21) are matched with the slide ways (16).

9. The photoelectric travel limit switch of claim 1, wherein: and a second rubber pad (22) matched with the semicircular groove is fixedly arranged on the inner wall of the semicircular groove formed in the shell (2).

10. The photoelectric travel limit switch of claim 1, wherein: the lens (4) is made of high-transmittance acrylic material.