JP2007311059A - Safety switch - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To surely protect getting stuck with an object entering or leaving there, damaging an actuator, or the like. <P>SOLUTION: The actuator 4 is mounted on a sliding member 5' and is slidable on a guide means 8'. On a flange 5c' of the sliding member 5' guided by the guide means 8'; an inclined plane 5g is formed from the front side of the flange 5c', and a shoulder 5f is formed at a transition point from the inclined plane 5g to a flat plane 5h of the rear side of the flange 5c'. This can prevent the sliding member 5' from an undesired protrusion due to vibration or shock. After a door 2 is closed, an operator pushes the sliding member 5' in a direction of an arrow head F11 so as to let a rear end face 8f climb over the shoulder 5f, and then the operator slides the sliding member 5' in a direction of an arrow head F12 so as to penetrate an operating piece 4a into a slot 7a and to rotate a cam, whereby the switch can be turned on. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a safety switch disposed at an opening / closing part of a door.

For example, a safety switch that is turned on / off according to the open / closed state of the door is provided on a door installed between a dangerous area in a factory, the inside of a machine that is automatically operated, or the like. As a typical prior art of the safety switch, for example, Patent Document 1 previously proposed by the present applicant can be cited. According to the prior art, the contact state is switched depending on whether or not the actuator provided on the door side presses the switch body provided on the wall surface side. In this prior art, when the door intersects with the opening / closing direction of the door, that is, when the door is a revolving door, the actuator protrudes and retracts in the end surface direction, and the hook member is provided integrally with the actuator. Therefore, the actuator is inserted (ON) into the switch body only at the will of the operator.
Japanese Patent Laid-Open No. 10-21793

  However, in the above prior art, the actuator does not inadvertently fit into the switch body due to the hook member, but when the door is open, the actuator (and the hook member) move undesirably due to vibration or the like ( May move forward) and protrude outward from the end face of the door. When these members protrude, there is a problem that they are caught by an object entering or exiting the member or the actuator is damaged.

  Therefore, the problem to be solved by the present invention is a safety that can surely prevent the actuator from unintentionally moving due to vibration or the like and protruding from the end face of the door or the wall surface without the intention of the operator. Is to provide a switch.

  In order to solve the above-described problem, in the invention of claim 1, an actuator is provided at one of the boundaries between the door and the wall surface, and a switch body that opens and closes when driven by the actuator is provided at the other. In the safety switch, the actuator is mounted, and on one side of the door and the wall surface, a movable member that can be projected and retracted from the one side to the other side, and a locking unit that locks the movable member in its retracted position. .

  According to a second aspect of the present invention, the safety switch according to the first aspect of the present invention further includes a cover member that covers the actuator.

  According to a third aspect of the present invention, in the safety switch according to the first or second aspect of the present invention, the locking means is formed on one of the movable member or the guide means thereof, and the movable member or the guide means thereof. And a biasing means for resiliently biasing the movable member with respect to the guide means in a direction in which the end surface comes into contact with the stepped portion.

  According to a fourth aspect of the present invention, in the safety switch according to the first or second aspect of the present invention, the locking means is provided on the movable member side, and is operated by an operator and operated by the operator. A locking piece that is displaced by an operation member, a spring member that elastically biases the locking piece so as to maintain a locked state, a locking recess that engages the locking piece, Is provided.

  According to a fifth aspect of the present invention, in the safety switch according to the first or second aspect of the present invention, the locking means is provided on one of the door and the wall surface, and the door and the wall surface of the movable member. A locking member that locks the other end surface of the door and one of the door and the wall surface, and is configured to elastically bias the locking member in a direction in which the locking member contacts the end surface. A biasing means provided on the other of the door and the wall surface, which contacts the locking member with the door closed, and displaces the locking member in a direction in which the locking member separates from the end surface. A stop release member.

  According to the first aspect of the present invention, the actuator is provided on one side of the boundary between the door that is opened and closed for the entry / exit of the worker and the wall surface, for example, on the door side, and thus on the wall surface side by the actuator. In a safety switch provided with a switch body that opens / closes (disconnects / connects the contact portion) by being driven to be displaced, the actuator is provided with one of the door and the wall surface to drive the switch body as described above. From the side, the actuator protrudes to the other side beyond the boundary door or wall end surface, so that the actuator can appear and disappear from the one side to the other side on one side of the door and the wall surface. Mount on a movable member. Therefore, the actuator can be in a state of being immersed inward from the end face of the door or wall surface serving as the boundary with the door open, and the actuator may be undesirably caught by an object entering or exiting the door. In addition, the actuator can be prevented from being damaged.

  Further, by providing locking means and locking the movable member at its retracted position, the movable member undesirably moves (advances) due to vibration or the like without the intention of the operator, and becomes the boundary. Protruding outward from the end face of the door or wall surface can be reliably prevented. Therefore, only by the will of the operator, the actuator can be jumped and displaced toward the switch body, and it can be more reliably prevented from being caught by an object entering or leaving the switch, or from being damaged.

  According to the second aspect of the present invention, the actuator can be more reliably prevented from being damaged.

  According to a third aspect of the present invention, the locking means is formed on one of the movable member or one of the guide means, and a step portion for locking the other end face of the movable member or the guide means; It comprises biasing means for resiliently biasing the movable member with respect to the guide means in a direction in which the end face comes into contact with the stepped portion. Therefore, the operator can push the movable member against the resilience of the biasing means, for example, only by pushing or lifting the movable member, and the end surface can get over the step and the movable member can be moved. . This prevents the movable member from moving undesirably (advancing) without the operator's intention as described above, and easily releases the locked state and allows the actuator to be inserted into the switch body. be able to.

  According to the invention of claim 4, the locking means is provided on the movable member side and is operated by an operator to be pressed, a locking piece that is displaced and driven by the operating member, A spring member that elastically biases the locking piece so as to maintain the locked state, and a locking recess that engages with the locking piece. Therefore, in a state where the locking piece is engaged with the locking recess, the movable member is locked so as not to move undesirably with respect to vibration or the like. By simply pressing the operating member against the elastic force of the member, the engagement state of the locking piece is released, and the movable member can be moved. This prevents the movable member from moving undesirably (advancing) without the operator's intention as described above, and easily releases the locked state and allows the actuator to be inserted into the switch body. be able to.

  According to the invention of claim 5, the locking member is provided on one of the door and the wall surface, and the locking member that locks the other end surface of the door and the wall surface of the movable member; An urging means that is provided on one of the door and the wall surface and elastically urges the locking member in a direction in which the locking member abuts on the end surface; and provided on the other of the door and the wall surface The locking member is in contact with the locking member in a state in which the door is closed, and displaces the locking member in a direction in which the locking member separates from the end surface against the elastic force of the biasing means. And a release member. Therefore, when the door is open, the other end face of the door and the wall surface of the movable member is prevented from undesirably moving due to the elastic force of the urging means against vibration or the like. The operator can simply close the door to release the locked state of the end face, and the movable member can be moved. This prevents the movable member from moving undesirably (advancing) without the operator's intention as described above, and easily releases the locked state and allows the actuator to be inserted into the switch body. be able to.

[Embodiment 1]
FIG. 1 is a cross-sectional view for explaining the operation of the safety switch 1 according to the first embodiment of the present invention, and FIGS. 2 and 3 are cross-sectional views of the safety switch 1. In FIG. 1 (a), the section line in FIG. 3 is indicated by III-III, in FIG. 3, the section line in FIG. 1 is indicated by II, and the section line in FIG. 2 is indicated by II-II. The safety switch 1 faces the boundary between the door 2 and the wall surface 3, and includes an actuator 4 provided on one of them, a slide member 5 as a movable member on which the actuator 4 is mounted, and the door 2 and the wall surface 3. And a switch body 7 provided on the other side of the boundary.

  In the embodiment shown in FIGS. 1 to 3, the actuator 4, the slide member 5, and the locking means 6 are provided on the door 2 side, and the switch body 7 is provided on the wall surface 3 side. May be provided on the wall surface 3 side and the switch body 7 on the door 2 side. The door 2 may be a sliding door that opens and closes with the wall surface 3 by sliding in the direction of the arrow F1, or a rotary door that opens and closes by rotating in the direction of the arrow F2. It may be.

  The switch body 7 includes a cam chamber 7b having a slot 7a into which the actuator 4 is fitted, and a switch chamber 7c connected to the cam chamber 7b. The actuator 4 fitted into the cam chamber 7b from the slot 7a rotates a cam (not shown), thereby displacing and driving a lever (not shown) in the switch chamber 7c to switch the contact state of one or a plurality of switches. An example of the switch body 7 is shown in Japanese Patent Application Laid-Open No. 2005-294047 previously proposed by the present applicant.

  The actuator 4 includes an operating piece 4a that fits into the slot 7a of the cam chamber 7b, and a mounting piece 4b for fixing the operating piece 4a to the slide member 5, and is formed in a substantially L shape in side view. The

  The slide member 5 includes a main body 5a to which the actuator 4 is fixed and which can slide on the guide means 8, a cover member 5b that covers and protects the operating piece 4a of the actuator 4, and an outer portion from the main body 5a. And a flange 5c for preventing the slide member 5 from falling off from the guide means 8 and an urging means 9.

  As shown in FIG. 3, the guide means 8 has a substantially U-shaped cross section perpendicular to the axis, and a central portion thereof is raised to form a first guide surface 8 a on which the slide member 5 straddles. The pair of free ends of the U-shape are folded inward to form second guide surfaces 8b and 8c for the flange 5c. The vicinity of the rearmost end of the guide means 8 is prevented by a screw 10 after the slide member 5 on which the actuator 4 is mounted is fitted into the guide means 8.

  The biasing means 9 is housed in a housing recess 5d formed in the main body 5a of the slide member 5, and a roller 9a that slides on the first guide surface 8a of the guide means 8 and the roller 9a. And a spring member (compression spring) 9b that elastically biases in the direction of the guide means 8. A ball or the like may be used instead of the roller 9a. The spring member 9b may be an elastic member such as a leaf spring or rubber, air pressure, hydraulic pressure (damper), a magnet, or the like.

  It should be noted that the portion on the wall surface 3 side of the second guide surfaces 8b and 8c of the guide means 8 is formed to be raised one step. Therefore, in a state where the slide member 5 on which the actuator 4 is mounted is accommodated on the rear end side of the guide means 8, the second guide surfaces 8b and 8c are moved by the roller 9a of the biasing means 9 and the flange 5c. The slide member 5 is locked by being sandwiched. On the other hand, even if the slide member 5 slides on the guide means 8 due to vibration or impact, the slide member 5 urged upward in FIGS. When 5e comes into contact with the raised step 8d, further displacement is prevented as shown in FIGS. After the door 2 is actually closed, the operator pushes the slide member 5 in the direction of the arrow F11 against the elastic force of the spring member 9b, and climbs over the step 8d on the front end surface 5e. By sliding in the direction of the arrow F12, as shown in FIG. 1B, the operating piece 4a can be fitted into the slot 7a and the cam can be rotated. The step 8d and the biasing means 9 constitute a locking means.

  In this way, the actuator 4 is mounted on the slide member 5 and guided by the guide means 8 so that the actuator 4 can protrude from the end surface 2a of the door 2 to the wall surface 3 side. It is possible to prevent the actuator 4 from being undesirably caught by an object that enters or exits the end face 2a, and to prevent the actuator 4 from being damaged. Further, since the actuator 4 can protrude to the wall surface 3 side beyond the end surface 2a of the door 2 as described above, by providing a step portion 8d as a locking means for locking the slide member 5 in the retracted position, It is possible to reliably prevent the actuator 4 from protruding from the end surface 2a to the outside by unintentionally moving (advancing) the slide member 5 by vibrations or the like without the intention of the operator, and entering and exiting there. It is possible to more reliably prevent the actuator 4 from being caught or the actuator 4 from being damaged.

  Furthermore, by providing the cover member 5b that covers the operating piece 4a of the actuator 4, it is possible to more reliably prevent the actuator 4 from being damaged. Further, the contact of the front end surface 5e with the stepped portion 8d and the release thereof are performed using the biasing means 9, so that the slide member 5 moves undesirably without the operator's intention as described above ( It is easy for the operator to push the slide member 5 in the direction of the arrow F11 so that the front end surface 5e gets over the stepped portion 8d and to slide in the direction of the arrow F12. Thus, the operation piece 4a can be fitted into the slot 7a.

[Second Embodiment]
FIG. 4 is a cross-sectional view for explaining the operation of the safety switch 11 according to the second embodiment of the present invention, and FIG. 5 is a cross-sectional view of the safety switch 11. In FIG. 5, the cut surface line of FIG. 4 is indicated by IV-IV. The safety switch 11 is similar to the safety switch 1 described above, and corresponding portions are denoted by the same reference numerals, and description thereof is omitted. It should be noted that in this safety switch 11, the second guide surfaces 8b 'and 8c' of the guide means 8 'are flat, and instead, the flange 5c' of the slide member 5 'is gently inclined from the front side. 5g is formed, and a step portion 5f is provided at a portion where the flat surface 5h is switched to the rear side.

  Therefore, when the slide member 5 ′ is in the rear position, the second guide surfaces 8b ′ and 8c ′ are sandwiched between the roller 9a of the biasing means 9 and the inclined surface 5g, and the slide member 5 'Is locked. On the other hand, even if the slide member 5 ′ slides on the guide means 8 ′ due to vibration or impact, the slide member 5 ′ urged upward in FIGS. When the stepped portion 5f comes into contact with the rear end face 8f of the guide means 8 ′, further displacement is prevented as shown in FIG. After the door 2 was actually closed, the operator pushed the slide member 5 'in the direction of the arrow F11 against the spring force of the spring member 9b, and got over the step 5f on the rear end face 8f. Then, by sliding in the direction of the arrow F12, the operating piece 4a can be fitted into the slot 7a and the cam can be rotated. These step portions 5f and urging means 9 constitute locking means.

  Even with such a configuration, it is possible to reliably prevent the slide member 5 ′ from undesirably moving (advancing) due to vibration or the like, and the actuator 4 protruding outward from the end face 2 a, It is possible to more reliably prevent the actuator 4 from being caught by an object that enters and exits and the actuator 4 from being damaged. That is, the step portions 8d and 5f are provided on either one of the slide members 5 and 5 'and the guide means 8 and 8', and the other end surfaces 5e and 8f may be locked. In the present embodiment, the remaining actuator 4, the switch body 7, the biasing means 9, and the like are the same as those in FIGS. 1 and 2 described above.

[Third Embodiment]
FIG. 6 is a sectional view of the safety switch 21 according to the third embodiment of the present invention. The safety switch 21 is similar to the safety switch 1 described above, and corresponding portions are denoted by the same reference numerals and description thereof is omitted. In FIG. 6, the configuration of the switch body 7 and the like on the wall surface 3 side is omitted. It should be noted that the safety switch 21 is provided with a locking member 29 for preventing the slide member 25 from protruding undesirably on the slide member 25 on which the actuator 4 is mounted. Correspondingly, a locking recess 28h is drilled from the first guide surface 8a of the guide means 28 at a corresponding position on the rear end side. The locking member 29 and the locking recess 28h constitute locking means.

  The locking member 29 includes an operation member 29a that is pressed by an operator, a locking piece 29b that is driven to be displaced by the operating member 29a, and an axis that is perpendicular to the axis of the guide means 28. A pin 29c that is swingably supported, and a spring member 29d that elastically biases the locking piece 29b so as to maintain the locked state and the operation member 29a to maintain the returning state. It is prepared for.

  In the main body 25a of the slide member 25, roughly two recesses 25h1 and 25h2 for accommodating the locking member 29 are formed, and the first recess 25h1 formed in the thickness direction of the door 2 is formed. The operating member 29a is housed in the thickness direction of the door 2 so that it can be moved in and out, and is urged in the protruding direction by the spring member 29d. The side of the operating member 29a that protrudes from the first recess 25h1 serves as an operating portion for the operator, and the opposite side serves as a connecting portion that is connected to the locking piece 29b. The locking piece 29b is generally formed in an L shape, its central portion is pivotally supported by the pin 29c, one end is connected to the operation member 29a, and the other end is fitted into the locking recess 28h. It becomes a stop and is accommodated in the second recess 25h2.

  Due to the upward biasing of the operation member 29a in FIG. 6 by the spring member 29d, the other end of the locking piece 29b protrudes from the second recess 25h2, and fits into the guide means 28 side, that is, the locking recess 28h. It is energized in the direction to insert. As a result, when the slide member 25 is located at a position opposite to the locking recess 28h, that is, in the vicinity of the rear end, the other end of the locking piece 29b is fitted into the locking recess 28h. Movement is blocked.

  On the other hand, after the door 2 is closed, the operator pushes the slide member 25 in the direction of the arrow F11 against the elastic force of the spring member 29d, and the other end of the locking piece 29 is the second. After escaping from the recess 25h2, the operating piece 4a can be fitted into the slot 7a by sliding in the direction of the arrow F12, and the cam can be rotated.

  Even with this configuration, it is possible to reliably prevent the slide member 25 from undesirably moving (advancing) due to vibration or the like, and the actuator 4 from protruding outward from the end surface 2a. It is possible to more reliably prevent the actuator 4 from being caught by an entering / exiting object or the like, or the actuator 4 from being damaged.

  The slide member 25 is provided with a handle 30. Thereby, in the operation in the direction of the arrow F11 or the direction of the arrow F12, the operator 4 can move the actuator 4 just by gripping and operating (pulling or pushing) the handle 30. Easy to operate.

  The locking member 29 is not limited to the structure shown in FIG. 6, and the engagement state between the locking piece 29b and the locking recess 28h can be released by the operating force of the operating member 29a in the direction of the arrow F11. If it is. For example, in the structure of FIG. 7A, the operation member 29a is not provided with the spring member 29d, and instead, the torsion coil spring 29d ′ is wound around the pin 29c that pivotally supports the locking piece 29. Is shown. In the structure of FIG. 7B, the shape of the locking piece 29 is changed from the structure of FIG. 7A, and a compression spring 29d ″ is used in accordance with the shape.

  Furthermore, in the structure of FIG. 7C, only the operation member 29a and the spring member 29d are provided on the slide member 25 side, and the locking piece 29b ″, the pin 29c and the compression spring 29d ″ are guided. It is provided on the means 28 side. In any of these aspects, the same effect as in FIG. 6 can be obtained.

[Fourth Embodiment]
FIG. 8 is a cross-sectional view for explaining the operation of the safety switch 31 according to the fourth embodiment of the present invention. The safety switch 31 is similar to the safety switch 1 described above, and corresponding portions are denoted by the same reference numerals and description thereof is omitted. In the safety switch 31, the slide member 5 has the same structure and is not changed. It should be noted that the safety switch 31 has a locking mechanism for preventing the slide member 5 from protruding undesirably on the front end side of the guide means 38. The member 39 is provided. Correspondingly, a part on the door 2 side of the base 7f on which the switch body 7 is mounted on the wall surface 3 is extended to the door 2 side, and an unlocking member for operating the locking member 39. 7g is formed.

  The locking member 39 includes a support post 39a installed at the front end of the guide means 38, an engagement piece 39b supported by the support post 39a so as to be swingable about an axis perpendicular to the axis of the guide means 38, and An end portion 39d of the locking piece 39b on the slide member 5 side is configured to include a spring member 39c that elastically urges the end portion 39d in a direction to contact the front end surface 5e of the slide member 5. The locking means is configured by the locking piece 39b as the locking member, the spring member 39c as the biasing means, and the locking release member 7g.

  Therefore, as shown in FIG. 8A, when the door 2 is opened, the end portion 39d of the locking piece 39b is pushed up by the elastic force of the spring member 39c, and the end portion 39d becomes the slide member 5. The front end surface 5e of the slide member 5 is abutted and the movement of the slide member 5 beyond the locking piece 39b is prevented. On the other hand, when the door 2 is closed, as shown in FIG. 8B, the end 39e opposite to the end 39d of the locking piece 39b is pushed up by the locking release member 7g. Thus, the end 39d is pulled down, the end 39d is separated from the front end surface 5e, and the operator can move the slide member 5.

  Even with this configuration, it is possible to reliably prevent the slide member 5 from undesirably moving (advancing) due to vibration or the like and the actuator 4 from protruding outward from the end surface 2a. It is possible to more reliably prevent the actuator 4 from being caught by an entering / exiting object or the like, or the actuator 4 from being damaged.

  In FIG. 8, the door 2 is shown as a rotary type, but it goes without saying that it may be a slide type. Further, although the locking piece 39b is shown in a linear seesaw shape, it is formed in a lever shape that is appropriately bent according to the shape of the opposing locking release member 7g, the opening / closing direction of the door 2, and the like. Also good. Furthermore, although the spring member 39c is shown as a compression spring, it may be a leaf spring or a torsion coil spring wound around a shaft that swingably supports the locking piece 39b on the column 39a.

  Further, the locking release member 7g protruding from the end of the base 7f is deleted, the end of the base 7f is configured as the locking release member 7g, and the end 39e of the locking piece 39b is configured as the base 7f. The end of the base 7f may come into contact with the locking piece 39b of the locking member 39 while the door 2 is closed, and the locking member 39 may be displaced.

[Modification]
As a modification of the configuration according to each of the embodiments described above, a key such as a padlock may be provided on the slide member 5 or the like instead of the locking means or as a part of the locking means. For example, a part of the key may engage with a predetermined engaging portion to stop the slide of the slide member 5 or the like. In this case, when the key is removed, sliding of the slide member 5 and the like is allowed. As another example, the locking state of the locking means may be locked with a key.

  Further, in each of the above-described embodiments, when the slide member 5 on which the actuator 4 is mounted is slid and displaced, the actuator 4 is displaced from the end surface 2a of the door 2 to the wall surface 3 side. The actuator 4 may be displaced from the end surface 2a of the door 2 toward the wall surface 3 side by rotating (or swinging) the slide member 5 around a predetermined axis like a so-called rotary handle.

It is sectional drawing for demonstrating operation | movement of the safety switch which concerns on 1st Embodiment of this invention. It is sectional drawing in a different cross section from FIG. It is sectional drawing seen from the cut surface line III-III of FIG. It is sectional drawing for demonstrating operation | movement of the safety switch which concerns on 2nd Embodiment of this invention. It is sectional drawing seen from the cut surface line VV of FIG. It is sectional drawing of the safety switch which concerns on 3rd Embodiment of this invention. It is sectional drawing for demonstrating the other aspect of the latching member in the safety switch of FIG. It is sectional drawing for demonstrating operation | movement of the safety switch which concerns on 4th Embodiment of this invention.

Explanation of symbols

1,11,21,31 Safety switch, 2 doors, 3 walls, 4 actuator, 4a actuating piece, 4b mounting piece, 5, 5 ', 25 slide member, 5a, 25a body, 5b cover member, 5c, 5c' flange 5e Front end surface, 5f Stepped portion, 5g Inclined surface, 5h Flat surface, 7 Switch body, 7a Slot, 7b Cam chamber, 7c Switch chamber, 7f Base, 7g Unlocking member, 8, 8 ', 28, 38 Guide means, 8a 1st guide surface, 8b, 8c, 8b ', 8c' 2nd guide surface, 8d step, 8f rear end face, 9 biasing means, 9a roller, 9b spring member, 10 screw, 25h1, 25h2 recess, 28h locking recess, 29, 39 locking member, 29a operation member, 29b, 39b locking piece, 29d, 39c spring member, 39a strut, 39d, 39e end.

Claims (5)

In a safety switch in which an actuator is provided on one of the boundaries between the door and the wall surface, and a switch body that opens and closes by being driven by displacement by the actuator on the other side,
Mounted the actuator, on one side of the door and the wall surface, a movable member that can protrude and retract from the one side to the other side;
Locking means for locking the movable member in its retracted position;
A safety switch comprising: The safety switch according to claim 1,
The safety switch further comprising a cover member that covers the actuator. The safety switch according to claim 1 or 2,
The locking means is
A stepped portion formed on one of the movable member or the guide means and locking the other end surface of the movable member or the guide means;
A biasing means for resiliently biasing the movable member with respect to the guide means in a direction in which the end face comes into contact with the stepped portion;
A safety switch comprising: The safety switch according to claim 1 or 2,
The locking means is
An operation member provided on the movable member side and operated to be pressed by an operator;
A locking piece that is displaced and driven by the operating member;
A spring member that elastically urges the locking piece to maintain the locked state;
A locking recess with which the locking piece engages;
A safety switch comprising: The safety switch according to claim 1 or 2,
The locking means is
A locking member that is provided on one of the door and the wall surface, and locks the other end surface of the movable member on the door and the wall surface;
An urging means provided on one of the door and the wall surface, and urgingly urging the locking member in a direction in which the locking member contacts the end surface;
An unlocking member that is provided on the other of the door and the wall surface, contacts the locking member in a state in which the door is closed, and displaces the locking member in a direction in which the locking member is separated from the end surface; ,
A safety switch comprising:

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