Trap-type key switch

Abstract

The present invention relates to a trap-type key switch and improves a structure so that a key may stay only in an auto section and a teach section through an automatic return structure of the key and induces a worker to enter a dangerous zone with the key in hand, thereby effectively preventing a safety accident incurred by another worker outside the danger zone arbitrarily manipulating the key when an original intended lock function is lost in case that the worker manipulates the key by avoiding a lock section.

Description

Trap-type key switch

[0001] The present invention relates to a trap-type key switch, and more specifically, to a trap-type key switch that improves the structure so that the key can only stay in the auto section and the teach section through the automatic return structure of the key, and also guides a worker to enter and exit a danger zone with the key in his / her possession, thereby effectively preventing a safety accident that occurs in advance due to another worker outside the danger zone arbitrarily operating the key due to the originally intended lock function being lost when the worker avoids the lock section and operates the key.

[0002] In general, a trap-type key switch is configured to enable stable operation by allowing the shaft to move forward or backward by the rotation of the key to connect and forcibly disconnect the contacts, and to enable stable use of the key switch by limiting the rotation of the key by a lock device.

[0003] In the conventional trap-type key switch disclosed in Korean Patent Registration No. 10-1295694, the key can be rotated 90 degrees (operable range) from the auto section to the teach section, and the auto-on section and teach-on section can be set to 40 degrees each, and the auto-off section and teach-off section can be set to 10 degrees.

[0004] In a conventional trap-type key switch, the key is configured to remain in a first position (maximum operating position and key lock position) or a second position (key release position and key lock position) when the key is operated.

[0005] However, if a worker manipulates the key by avoiding the lock section, the original intended lock function is lost, and there is a problem that a safety accident may occur if another worker outside the danger zone manipulates the key arbitrarily.

[0006] Here, a safety accident refers to an accident in which a worker enters a danger zone without carrying a key in the key ring, and another worker outside the danger zone arbitrarily manipulates the key and operates a robot or equipment, resulting in injury to the worker.

[0007] In addition, in the conventional trap-type key switch, the contact plate is fixed to the socket housing by a bolt fastening method, so it has the disadvantage of poor assembly and requiring a lot of disassembly time for maintenance, as well as the inability to use other contact plates with various shapes and contact points.

[0008] The present invention was invented to solve the above-mentioned problem, and the first object of the present invention is to provide a trap-type key switch that improves the structure so that the key can only stay in the Auto section and the Teach section through the automatic return structure of the key, and guides the worker to enter and exit the danger zone with the key in his / her possession, so that when the worker operates the key to avoid the lock section, the originally intended lock function is lost, and a safety accident caused by another worker outside the danger zone arbitrarily operating the key can be effectively prevented in advance.

[0009]

[0010] The second object of the present invention is to provide a trap-type key switch in which a key detection sensor is installed inside the cover to precisely detect whether a key is inserted into a keyhole or removed from a keyhole of a key unit, thereby confirming whether a worker is carrying a key when entering or exiting, and an LED lamp is installed on the front of the cover, but is larger in size than a conventional point light source structure and maintains a brighter illumination level, thereby displaying a key locking status with high visibility.

[0011]

[0012] The third object of the present invention is to provide a trap-type key switch having excellent versatility by enabling the contact plate to be reliably and detachably assembled or separated from the hook hanger of the socket housing, thereby improving fastening properties and enabling the use of different contact plates having various shapes and contact points.

[0013] In order to achieve the above-described object, a trap-type key switch according to the present invention comprises: a main case having a receiving space at its center; a key assembly rotatably installed within the receiving space and exposed to the front of the main case, the key assembly having a key groove for inserting a key to operate; a cover assembled to the front of the main case and having an opening portion at its center for exposing the key assembly to the outside; a key detection sensor installed inside the cover for detecting whether the key (K) is inserted into the key groove (120a) of the key assembly; an operating module connected to an end of the key assembly and performing a rotation and push operation while being flexibly moved forward and backward by the key assembly; a solenoid installed in the main case and having a lock head for selectively locking the rotation of the key assembly; The technical features include a socket housing that is assembled to the rear of the main case and has at least one hook part; and a contact plate that has at least one hook for coupling to the hook part on one side so that it can be selectively coupled to or separated from the socket housing, and has a contact terminal that is contacted by the rotation and push operations of the operating module on the other side.

[0014]

[0015] Additionally, an LED lamp that is mounted on a circuit board and electrically connected and emits light in a plane can be installed so that it is exposed on the front of the cover.

[0016]

[0017] Additionally, the main circuit board may be equipped with a lock head detection sensor that detects the position of the lock head of the solenoid and thus detects the operation of the solenoid.

[0018]

[0019] In addition, the operating module may include an upper rotary pusher connected to the key core of the key block by a pin spring and having a locking hole into which the lock head of the solenoid is selectively inserted and locked; a bottom rotary pusher connected to the upper rotary pusher and selectively pushing and contacting the contact terminal by a rotation and push operation, the bottom rotary pusher having a path having an inclined portion formed between the bottom portion and the top portion; a spring installed in the upper rotary pusher to elastically support the bottom rotary pusher; and a stopper provided on the inner peripheral surface of the socket housing to limit the position of the bottom rotary pusher while contacting the inclined portion during the rotation and push operation.

[0020]

[0021] In addition, the bottom rotation pusher may be configured with a first bottom rotation pusher connected to the upper rotation pusher with a connecting pin (spring pin); and a second bottom rotation pusher having a larger diameter than the first bottom rotation pusher, located inside the socket housing, and having a contact terminal contact groove that contacts the contact terminal.

[0022]

[0023] In addition, the hook hangers may be arranged at regular intervals on both sides of the rear of the socket housing, and the hooks may be installed at regular intervals on both sides of the front of the contact play.

[0024] When attaching a hook to the above hook hanger, a guide slope may be formed on the front end of the hook hanger to guide the progress of the hook.

[0025]

[0026] In addition, the key unit may be configured to include a key outer housing having a keyway; a key core inserted into the key outer housing; and a key housing coupled to the key core.

[0027]

[0028] Additionally, mounting brackets may be installed on both sides of the main case for installation and fixation.

[0029] The above mounting bracket may be configured to include a fixing plate having a fixing projection that fits into a fixing groove formed on both sides of the main housing; and a support that extends from the fixing plate and is stably contacted and supported.

[0030]

[0031] Meanwhile, the trap-type key switch according to the present invention has a technical feature that is configured to effectively prevent safety accidents that occur in advance due to the key being arbitrarily operated by another worker outside the danger zone by losing the original intended lock function when the key is operated by the worker avoiding the lock zone by operating the key, by having an operation module for the automatic return function of the key so that the key can only remain in the auto section and the teach section.

[0032] As described above, the present invention has the following effects.

[0033] First, the structure is improved so that the key can only stay in the Auto and Teach sections through the automatic return structure of the key. In the event that a worker operates the key while avoiding the lock section, the original intended lock function is lost, and the worker is guided to enter the danger zone with the key in his possession, thereby effectively preventing safety accidents caused by other workers outside the danger zone arbitrarily operating the key.

[0034] Second, a key detection sensor is installed inside the cover to precisely detect whether the key is inserted into the keyhole or removed from the keyhole, thereby confirming whether the worker has entered the workplace with the key.

[0035] Third, an LED lamp is installed on the front of the cover, but it is larger than the existing point light source structure and maintains a brighter brightness to clearly indicate the key locking status.

[0036] Fourth, the contact plate can be reliably and detachably assembled or separated from the hook hanger of the socket housing, thereby improving fastening properties and enabling the use of other contact plates with various shapes and contact points, thereby improving compatibility.

[0037] Fifth, mounting brackets are provided on both sides of the main case, eliminating the need for multiple separate fastening bolts, which significantly reduces construction time and improves constructability.

[0038] Figure 1 is a perspective view illustrating a combined trap-type key switch according to a preferred embodiment of the present invention.

[0039] Figure 2 is a front view of Figure 1

[0040] Figure 3 is a plan view of Figure 1

[0041] Figure 4 is a side view of Figure 1

[0042] Figures 5 and 6 are exploded perspective views showing a trap-type key switch according to a preferred embodiment of the present invention.

[0043] Figure 7 is an exploded cross-sectional view showing a trap-type key switch according to a preferred embodiment of the present invention.

[0044] Figures 8 and 9 are perspective views showing a housing and a cover in a trap-type key switch according to a preferred embodiment of the present invention.

[0045] FIG. 10 is an exploded perspective view showing a key unit in a trap-type key switch according to a preferred embodiment of the present invention.

[0046] Figures 11 and 12 are exploded perspective views showing an operating module in a trap-type key switch according to a preferred embodiment of the present invention.

[0047] FIG. 13 is a perspective view showing an operating module coupled to a socket housing in a trap-type key switch according to a preferred embodiment of the present invention.

[0048] Fig. 14 is a perspective view showing a stopper of an operating module in a trap-type key switch according to a preferred embodiment of the present invention.

[0049] Fig. 15 is a cross-sectional view showing an operating module in a trap-type key switch according to a preferred embodiment of the present invention.

[0050] FIG. 16 is a drawing showing a trap-type key switch according to a preferred embodiment of the present invention, in which the stopper of the operating module is supported on the bottom (a) and the stopper of the operating module is supported on the top (b) (b).

[0051] FIG. 17 is a drawing showing a state in which a stopper of an operating module is in contact with an inclined portion in a trap-type key switch according to a preferred embodiment of the present invention.

[0052] Figures 18 and 19 are perspective views showing the combined state of the socket housing and the contact plate in a trap-type key switch according to a preferred embodiment of the present invention.

[0053] Hereinafter, a trap-type key switch according to a preferred embodiment of the present invention will be described in detail with reference to the attached drawings.

[0054] FIG. 1 is a perspective view illustrating a combined trap-type key switch according to a preferred embodiment of the present invention, FIG. 2 is a front view of FIG. 1, FIG. 3 is a plan view of FIG. 1, FIG. 4 is a side view of FIG. 1, FIGS. 5 and 6 are exploded perspective views illustrating a trap-type key switch according to a preferred embodiment of the present invention, and FIG. 7 is an exploded cross-sectional view illustrating a trap-type key switch according to a preferred embodiment of the present invention.

[0055] First, as illustrated in FIGS. 1 to 7, a trap-type key switch (100) according to a preferred embodiment of the present invention is configured to enable stable operation by allowing the operation module (150) to move forward or backward by the rotation of the key (K) to connect and forcibly disconnect the contacts, and to enable stable use of the key switch by limiting the rotation of the key (K) by a locking device (e.g., solenoid) (160).

[0056] A trap-type key switch (100) according to a preferred embodiment of the present invention has a technical feature comprising: a main case (110) forming an exterior; a key assembly (120) having a key groove (120a) and rotating at a predetermined angle by rotation of a key (K); a cover (130) assembled to the front surface of the main case (110); a key sensor (140) detecting a rotational position of the key (K); an operating module (150) performing a rotation and push operation by the key assembly (120); a solenoid (160) controlling the rotation of the key assembly (120) to maintain a locked state; a socket housing (170); and a contact plate (180) that can be selectively coupled to or separated from the socket housing (170).

[0057] In a trap-type key switch (100) according to a preferred embodiment of the present invention, for convenience of explanation, the cover (130) side is defined as the front direction, and the contact plate (180) side is defined as the rear direction.

[0058]

[0059] Looking specifically at the trap-type key switch (100) components according to a preferred embodiment of the present invention, first, as shown in FIGS. 1 to 7, the main case (110) forms an exterior and has a receiving space (111) in the center thereof.

[0060] A cover (130) is positioned on the front of the main case (110). The main case (110) may be formed integrally with the cover (130) or, although not shown in the drawing, may be formed separately.

[0061] An opening (130a) is formed in the center of the cover (130) to expose the key ring (120) to the outside.

[0062] The cover (130) may be composed of a bottom cover (130A) and a top cover (130B) that is coupled (assembled) to the bottom cover (130A). The bottom cover (130A) may be formed integrally with the main case (110).

[0063] As illustrated in FIGS. 5 to 7, a step (131) is formed at the center of the bottom cover (130A) to fix the position of the key assembly (120). The step (131) serves to stably support and protect the engaging step (121a) of the key outer housing (121) described later.

[0064] The joint structure of the bottom cover (130A) and the top cover (130B) can be configured in various ways, and for example, they can be joined using a bolt fastening method.

[0065] A circuit board (137) is installed inside the cover (130), and an LED lamp (L) that is mounted on the circuit board (137) and electrically connected to the front of the top cover (130B) and emits light in a surface can be installed so that it is exposed to the outside.

[0066] As shown in FIGS. 1 and 2, the LED lamp (L) is larger in size and maintains a brighter illumination than the existing point light source structure, so that the key locking status can be displayed with high visibility.

[0067] As illustrated in Fig. 2, auto and teach are indicated on the front of the cover (130). For example, the key (K) can be rotated 90 degrees (operable range) from the auto section to the teach section, and the auto-on section and teach-on section can be set to 40 degrees each, and the auto-off section and teach-off section can be set to 10 degrees.

[0068] In the trap-type key switch (100) of the present invention, the key (K) is configured to remain in the first position (maximum operating position and key lock position) or the second position (key separation position and key lock position) when the key (K) is operated.

[0069]

[0070] In addition, as shown in FIGS. 5 to 7 and FIG. 10, the key unit (120) is installed in the receiving space (111) and is installed so as to be exposed to the front of the main case (110), and has a key groove (120a) so that the key (K) can be inserted and operated.

[0071] Briefly describing the configuration of the key unit (120) of the present invention, the key unit (120) may be configured to include a key outer housing (121) having a key groove (120a); a key core (122) inserted into the key outer housing (121); and a key housing (123) coupled to the key core (122).

[0072] A lock head insertion hole (123a) is formed in the key housing (123) so that the lock head (161) of the solenoid (160) described later can be selectively inserted to maintain a locked state. A detailed description of the configuration and operation of the key unit (120) will be omitted.

[0073]

[0074] In addition, referring to FIGS. 5 to 7, the key detection sensor (140) is installed inside the cover (130) and mounted on the circuit board (137), and serves to detect a key (K) inserted into a key groove (120a) of a key block (120).

[0075] The nose (K1) of the key (K) (see Fig. 5) is selectively caught (interfered with) by a step (not shown) formed on the inner surface of the key outer housing (121) to prevent rotation of the operating module (150) when the connection terminal (182) is in the on state.

[0076] The above key detection sensor (140) can be installed so that two sensors face each other at a certain distance, and can detect whether the key (K) is inserted into the key home (120a) or whether the key (K) is separated from the key home (120a), thereby confirming whether the worker has entered the workplace carrying the key (K).

[0077]

[0078] In addition, referring to FIGS. 5 to 7 and FIGS. 11 to 17, the operating module (150) is connected to the end of the key block (120) by a pin spring (P), and the operating module (150) performs a pushing action by elastically moving back and forth by the rotation and pushing of the key core (122) of the key block (120).

[0079] The contact terminal (182) of the contact plate (180) can be configured to be connected on or off by the push operation of the above operation module (150).

[0080] As the connection of the contact terminal (182) is turned on or off, the internal contacts of the contact plate (180) can be brought into contact or separated, thereby connecting or disconnecting an electric signal.

[0081] Looking at the configuration of the above operating module (150), the operating module (150) is configured to include an upper rotation pusher (151); a bottom rotation pusher (152); a spring (153); and a stopper (154).

[0082] And the bottom rotation pusher (152) may be composed of a first bottom rotation pusher (152A) connected to the upper rotation pusher (151) by a pin spring (P); and a second bottom rotation pusher (152B) having a larger diameter than the first bottom rotation pusher (152A), located inside the socket housing (150), and having a contact terminal contact groove (H) that contacts the contact terminal (182).

[0083]

[0084] Looking at the configuration of the above operating module (150) in more detail, the upper rotation pusher (151) is connected to the key core (122) of the key unit (120) by a pin spring (P).

[0085] The above bottom rotation pusher (152) is connected to the upper rotation pusher (151) and contacts the contact terminal (182) by elastically pressing it through a pushing motion, and has a path (156) in which an inclined portion (156b) is formed between the bottom portion (156a) and the top portion (156c).

[0086] The contact terminal contact groove (H) (shown in Fig. 12) of the above bottom rotation pusher (152) is configured so that the contact terminal (182) comes into contact while being pressed.

[0087] The above spring (153) is installed in the upper rotation pusher (151) to elastically support the bottom rotation pusher (152).

[0088] And the stopper (154) is formed on the inner surface of the socket housing (170) to limit the position of the bottom rotation pusher (152) while contacting the inclined portion (152a) during rotation and pushing operations.

[0089] Referring to FIGS. 16 and 17, when the operating module (150) rotates and pushes, the stopper (154) is elastically contacted along the path (156) of the bottom rotation pusher (152). When the stopper (154) is located at the bottom portion (156a), the connection of the contact terminal (182) is turned off, and when the stopper (154) is located at the top portion (156c), the connection of the contact terminal (182) is turned on.

[0090] As the connection of the contact terminal (182) is turned on or off, the internal contacts of the contact plate (180) can be brought into contact or separated, thereby connecting or disconnecting an electric signal.

[0091] When the contact terminal (182) is connected to the on state, the contact terminal (182) is caught (interfered) within the contact terminal contact groove (H) to stop the rotation of the operating module (150).

[0092] The stopper (154) of the present invention is formed integrally on the inner surface of the socket housing (170) and is formed in a triangular shape, so that in order to solve the previous problem of losing the original intended lock function when the operator operates by avoiding the lock section, the present invention is configured so that the key (K) can only stay in the auto section and the teach section through the automatic return (or automatic rotation) function.

[0093] That is, by forming a slope (156b) between the bottom (156a) and the top (156c) to provide an automatic return structure for the key (K), the structure is improved so that the key (K) can only stay in the Auto section and the Teach section, and by guiding the worker to enter and exit the danger zone with the key (K), if the worker avoids the lock section and operates the key (K), the originally intended lock function is lost, and a safety accident caused by another worker outside the danger zone arbitrarily operating the key (K) can be effectively prevented in advance.

[0094]

[0095] In addition, as shown in FIGS. 5 to 7, the solenoid (160) is installed in the main case (110) and has a lock head (161) that is selectively inserted into the lock head insertion hole (123a) of the key housing (123) for locking.

[0096] The solenoid (160) is an actuator that controls the rotational motion of the key assembly (120), and is configured to move a shaft (not shown) having a lock head (161) forward and backward by an externally installed control unit or PLC (not shown), and is configured to control (lock) the rotation of the key housing (123) by selectively inserting the lock head (161) into the lock head insertion hole (123a).

[0097] The main circuit board (MP) may be equipped with a lock head detection sensor (S) that detects the position of the lock head (161) and thus detects the operation of the solenoid (160). By detection by the lock head detection sensor (S), the LED lamp (L) may indicate key locking.

[0098]

[0099] Additionally, the socket housing (170) is assembled to the rear of the main case (110) and has at least one hook hanger (171).

[0100] The hook hangers (171) are configured to be elastically opened at regular intervals from each other, so that a plurality of contact plates (180) having various shapes and contact points can be stably and detachably assembled or separated.

[0101] The above contact plate (180) has at least one hook (181) on one side for coupling to a hook hanger (171) so that it can be selectively coupled to or separated from the socket housing (170).

[0102] The above contact plate (180) has a contact terminal (182) that is contacted by the rotation and pushing operation of the operating module (150) on the other side.

[0103] The above hook hangers (171) are arranged at regular intervals on both sides of the rear of the socket housing (170), and the hooks (181) are installed at regular intervals on both sides of the front of the contact play (180).

[0104] When attaching a hook (181) to the above hook hanger (171), a guide slope (171a) may be formed on the front end of the hook hanger (171) to guide the progress of the hook (181).

[0105]

[0106] Additionally, mounting brackets (190) may be further installed on both sides of the main case (110) for installation and fixation.

[0107] A trap-type key switch (100) according to a preferred embodiment of the present invention has a mounting bracket (190), so that a number of separate fastening bolts are unnecessary, thereby significantly reducing construction time and improving constructability.

[0108] The unexplained symbol 2 (shown in Fig. 5) is a terminal block that supplies power to the output or solenoid.

[0109]

[0110] The operation of the trap-type key switch (100) according to a preferred embodiment of the present invention configured as described above is described as follows.

[0111] As shown in FIGS. 1 and 2, a trap-type key switch (100) according to a preferred embodiment of the present invention has an LED lamp (L) installed on the front of a cover (130), which is larger in size and brighter than a conventional point light source structure, so as to indicate a key locking state with high visibility.

[0112]

[0113] In a trap-type key switch (100) according to a preferred embodiment of the present invention, during rotation and push operations, a stopper (154) is elastically contacted along the path (156) of a bottom rotation pusher (152), and at this time, the position of the stopper (154) is fixed, and the path (156) of the bottom rotation pusher (152) that contacts the stopper (154) is changed.

[0114] That is, when the stopper (154) is positioned at the bottom portion (156a) as shown in (b) of FIG. 16, the connection of the contact terminal (182) is turned off, whereas when the stopper (154) is positioned at the top portion (156c) as shown in (a) of FIG. 16, the connection of the contact terminal (182) is turned on. As the connection of the contact terminal (182) is turned on or off, the internal contacts of the contact plate (180) may come into contact or be separated, thereby connecting or disconnecting an electric signal.

[0115] The above stopper (154) is integrally formed on the inner surface of the socket housing (170) and is formed in a triangular shape, so that in order to solve the conventional problem that the original intended lock function is lost when the operator operates the key while avoiding the lock section, the present invention provides an automatic return (or automatic rotation) function so that the key (K) can only stay in the auto section and the teach section. In this case, an inclined section (156b) is formed between the bottom section (156a) and the top section (156c) to provide an automatic return structure for the key, thereby improving the structure so that the key can only stay in the auto section and the teach section. In addition, by guiding the operator to enter and exit the danger zone while holding the key (K), the original intended lock function is lost when the operator operates the key (K) while avoiding the lock section, and thus a safety accident caused by another operator outside the danger zone arbitrarily operating the key (K) can be prevented in advance.

[0116]

[0117] Referring further to FIGS. 18 and 19, the socket housing (170) is provided with at least one hook hanger (171), and the hook hangers (171) are configured to be elastically spread apart at a certain interval from each other, thereby enabling the contact plate (180) to be reliably and detachably assembled or separated, and the fastening property is improved, and the use of other contact plates having more diverse shapes and contact points is possible.

[0118]

[0119] As described above, the present invention has the following effects.

[0120] First, the structure is improved so that the key can only stay in the Auto and Teach sections through the automatic return structure of the key. In the event that a worker operates the key while avoiding the lock section, the original intended lock function is lost, and the worker is guided to enter the danger zone with the key in his possession, thereby effectively preventing safety accidents caused by other workers outside the danger zone arbitrarily operating the key.

[0121] Second, a key detection sensor is installed inside the cover to precisely detect whether the key is inserted into the keyhole or removed from the keyhole, and to easily check whether a worker is carrying a key and entering the workplace.

[0122] Third, an LED lamp is installed on the front of the cover, but it is larger than the existing point light source structure and maintains a brighter brightness to indicate the key locking status with high visibility.

[0123] Fourth, the contact plate can be reliably and detachably assembled or separated from the hook hanger of the socket housing, thereby improving fastening properties and enabling the use of other contact plates with more diverse shapes and contact points.

[0124] Fifth, mounting brackets are provided on both sides of the main case, eliminating the need for multiple separate fastening bolts, which significantly reduces construction time and improves constructability.

[0125] The terms and words used in this specification and claims described above should not be interpreted as limited to their usual or dictionary meanings, but should be interpreted with meanings and concepts that conform to the technical idea of ​​the present invention based on the principle that the inventor can appropriately define the concept of the term in order to explain his or her own invention in the best way.

[0126] Therefore, the embodiments described in this specification and the configurations illustrated in the drawings are only the most preferred embodiments of the present invention and do not represent all of the technical ideas of the present invention. Therefore, it should be understood that there may be various equivalents and modified examples that can replace them at the time of filing this application.

Claims

1. A main case (110) having a receiving space (111) in the center; A key unit (120) that is installed rotatably within the above-mentioned receiving space (111) and is installed so as to be exposed to the front of the main case (110), and has a key groove (120a) so that it can be operated by inserting a key (K); A cover (130) assembled on the front of the main case (110) and having an opening (130a) in the center for exposing the key group (120) to the outside; An operating module (150) connected to the end of the key group (120) and performing a rotation and pushing operation while being elastically moved forward and backward by the key group (120); A solenoid (160) installed in the main case (110) and having a lock head (161) to selectively lock the rotation of the key unit (120); A socket housing (170) assembled on the rear of the main case (110) and having at least one hook hanger (171); and A contact plate (180) having at least one hook (181) for coupling to the hook hanger (171) on one side so that it can be selectively coupled to or separated from the socket housing (170), and having a contact terminal (182) that is contacted by the rotation and push operation of the operating module (150) on the other side; It further includes a key detection sensor (140) installed inside the cover (130) and detecting whether the key (K) is inserted into the key groove (120a) of the key unit (120); The above operating module (150) is An upper rotary pusher (151) connected to the key core (122) of the above key assembly (120) by a pin spring (P); A bottom rotation pusher (152) connected to the upper rotation pusher (151) and selectively contacting the contact terminal (182) by means of a rotation and pushing motion, and having a path (156) in which an inclined portion (156b) is formed between the bottom portion (156a) and the top portion (156c); A spring (153) installed in the upper rotation pusher (151) to flexibly support the bottom rotation pusher (152); and A trap-type key switch having a stopper (154) provided on the inner surface of the socket housing (170) to limit the position of the bottom rotation pusher (152) while elastically contacting along the path (156) during a push operation.

2. In paragraph 1, A trap-type key switch characterized in that an LED lamp (L) electrically connected to a main circuit board (MP) and emitting light in a plane is installed so as to be exposed on the front of the cover (130).

3. In paragraph 1, A trap-type key switch characterized in that a lock head detection sensor (S) is mounted on the main circuit board (MP) to detect the position of the lock head (161) and thereby detect the operation of the solenoid (160).

4. In paragraph 1, The above bottom rotation pusher (152) is A first bottom rotation pusher (152A) connected to the upper rotation pusher (151) by a connecting pin (P); and A trap-type key switch characterized by comprising a second bottom rotation pusher (152B) having a larger diameter than the first bottom rotation pusher (152A) and located inside the socket housing (150) and having a contact terminal contact groove (H) that contacts the contact terminal (182).

5. In paragraph 1, The above hook hangers (171) are arranged at regular intervals on both sides of the rear of the socket housing (170), and the hooks (181) are installed at regular intervals on both sides of the front of the contact plate (180). A trap-type key switch characterized in that, when the hook (181) is connected to the hook hanger (171), a guide slope (171a) is formed on the front end of the hook hanger (171) to guide the progress of the hook (181).

6. In paragraph 1, The above key cluster (120) is Key outer housing (121) having a keyway (120a); A key core (122) inserted into the key outer housing (121); and A trap-type key switch comprising a key housing (123) coupled to the key core (122) and having a lock head insertion hole (123a) into which the lock head (161) of the solenoid (160) is selectively inserted and locked.

7. In paragraph 1, A trap-type key switch characterized in that a mounting bracket (190) is installed on both sides of the main case (110) for installation and fixation.

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