TW201736700A - Key hole shielding device particularly relates to a device for installation on the outer side of the main startup switch lock of a motorcycle, to achieve the purpose of shielding the keyhole in the prevention of sabotage or theft - Google Patents

Abstract

The present invention relates to a key hole shielding device comprising an accommodating space; the accommodating space is internally pivoted with a locking piece and a shielding part linked with the locking piece; the key hole shielding device further comprises a release button slidably combined with a lock seat; when the shielding part is located on an open position for opening a key hole, the release button is at a first position, and the locking piece is fixedly arranged on a non-locking position; when the release button moves to a second position to release the locking piece, the shielding part is pivoted to a shielding position for shielding the key hole and is linked with the locking piece to be pivoted to a locked position, so that the shielding part is fixedly arranged on the shielding position; in addition, a magnet key can be used to unlock the locking piece, and the shielding part is further operated to be pivoted to the open position.

Description

Keyhole shielding device

The invention relates to a keyhole shielding device, in particular to a device which is installed on the outer side of the main switch lock of the locomotive and can shield the keyhole of the lock of the main switch lock to prevent the small damage or unlock the lock core.

Commercially available locomotives are usually equipped with a set of main switch locks that allow the user to lock or unlock the steering handle of the locomotive through the main switch lock, and the main switch lock can also control the power supply or power off of the locomotive's power system. The main switch lock is locked by a conventional mechanical lock. When the correct key is inserted into the lock core, the lock is kept in the locked state, so that the main switch lock cannot be operated, and the anti-theft effect is further achieved.

This type of lock on the main switch lock has been used for a long time, so there are many ways to crack or destroy the locomotive, so the theft rate of the locomotive with the main switch lock is still high. Some manufacturers have developed a shielding device that is installed on the main switch lock and unlocked with a magnet key. The shielding device shields or opens the key hole of the main switch lock by a movable shielding member, so that the small device cannot easily damage or crack the main key. The lock lock locks the benefits of reducing the chance of locomotive stealing.

In order to be able to operate the shielding member to cover the key hole of the main switch lock, a handle portion protruding from the outer cover of the shielding device is disposed on the shielding member, and the shielding member is located at the opening of the key hole of the open main switch lock. In the position state, pushing the handle can cause the shielding member to move from the open position to the shielding position of the key hole shielding the main switch lock, and the handle of the shielding device protrudes from the shielding device when the shielding member is in the open position The outer side of the outer cover, however, the general shielding device is installed in a small space near the steering handle of the locomotive, so that if there is a protrusion on the outer side of the shielding device, it may not be installed on a part of the locomotive, and further, due to the handle of the shielding member, The outer side of the shielding device protrudes, so the outer cover needs to be provided with a larger hole to provide handle movement, which makes it easier to break the shielding device from this hole.

In order to solve the problem, the present invention provides a keyhole shielding device comprising: a lock base including an upper surface and a lower surface spaced apart along a longitudinal direction, the lock seat further comprising a perforation extending from the upper surface to the lower surface in the longitudinal direction The lock base further includes a first pivot portion and a slot formed on the upper surface and spaced apart from the through hole, and an outer cover fixed on the outer side of the lock seat includes a first hole and a second hole penetrating the end wall And a third hole, the outer cover and the lock seat define an accommodating space communicating with the first, second and third holes, the first hole of the outer cover is aligned with the perforation, the second hole and the first pivot Aligning, the third hole is aligned with the slot, and a shielding member received in the accommodating space includes a linkage rod, and the shielding member can cover a hole and a shielding position of the first hole and the opening hole and the first hole Displacement between an open position, a first spring is received between the shielding member and the lock seat, the first spring biases the shielding member toward the shielding position, and is pivotally coupled to the first pivot portion and the second hole The pivoting lock block includes a linkage with the linkage rod of the shielding member a moving rod, the locking block pivots between a locking position and an unlocking position with the first pivot as a pivot axis, and a release button is movably coupled with the slot and the third hole, and the release button can be along the slot Displacement between a first position blocking the lock block and a second position not blocking the lock block, a return spring disposed within the slot and located between the release button and the end face of the slot, the return spring facing first The direction of the position biases the release button.

With the shield in the open position, the lock block is in the unlocked position and the release button is in the first position, causing the lock block to be positioned in the unlocked position and the shield to be positioned in the open position, with the shield in the open position And in a state in which the release button is displaced from the first position to the second position to release the lock block, the first spring biasing shield is displaced from the open position to the shielding position, and the linkage lever biasing the lock block is displaced from the unlocked position to the locked position, Causing the lock block to be locked and the release button to remain in the second position, the push lever biasing the linkage lever causing the shield to be displaced from the shield position to the open position in a state where the lock block is unlocked and pivoted to the unlocked position by the lock position, and The release button is displaced from the second position to the first position.

The keyhole shielding device of the present invention can easily cause the shielding member to be displaced from the open position to the shielding position by pressing the release button, and has high convenience in use.

The linkage rod of the shielding member comprises a guiding groove, and the pushing rod of the locking block further comprises a pin formed on the bottom surface, and the pushing rod of the locking block is located below the linkage rod of the shielding member in the longitudinal direction, and the pin of the pushing rod is slidably received In the guide groove of the linkage rod, the displacement of the shielding member between the open position and the shielding position causes the interlocking lock block to pivot between the unlocked position and the locked position.

The shielding member of the keyhole shielding device of the present invention is coupled with the lock block in the open position or the shielding position, so that in the state where the shielding member is in the shielding position, the locking block is locked in the locking position and cannot be pivoted by the magnets. Therefore, in the state where the correct magnet key is not used, the shielding member cannot be pivoted by the shielding position to the open position alone, that is, the driving of the shielding member from the shielding position to the open position can only rely on the correct magnet key transmission operation. The lock block is achieved, so that the keyhole shielding device of the second embodiment of the present invention has a higher anti-theft effect in addition to the convenience of operating the shielding member to the shielding position.

In addition, the keyhole shielding device of each embodiment positions the shielding member in an open position through the release button and the locking block, and pushes the shielding member through the operation locking block, so that the shielding member can operate the shielding member without opening the outer cover of the outer cover. The positional displacement to the shielding position further causes the keyhole shielding device of each embodiment to maintain a circular outer contour and does not have objects protruding from the peripheral surface of the outer cover, thus facilitating the narrow space on the locomotive of various models. Install the keyhole shielding device.

According to the first embodiment shown in the drawings of Figures 1-8, the keyhole screening device 10 of the present invention can be used in conjunction with a main switch lock 94 on the locomotive to provide a keyhole for shielding or opening the main switch lock 94. The keyhole shielding device 10 includes a lock base 20 that includes a circular base portion 22 that includes an upper surface 24 and a lower surface spaced apart along a longitudinal direction. 26, the base 22 further includes a perforation 28 extending from the upper surface 24 to the lower surface 26 and substantially at the center of the base 22, the lock housing 20 being advanced including a set 38 formed on the lower surface 26 and engageable with the main switch lock 94, The sleeve portion 38 is aligned with the through hole 28, and the lock base 20 further includes a first pivot portion 30, a second pivot portion 34 and a slot hole 36 formed in the upper surface 24 and outside the through hole 28, the first and second pivot portions 30, 34 are spaced apart from each other in the circumferential direction of the longitudinal direction, and the first pivot portion 30 includes four pockets 32 extending longitudinally from the end faces thereof (e.g. As shown in FIG. 4), the second pivot portion 34 includes an annular groove 35.

According to the first embodiment shown in the drawings of Figs. 1-8, the keyhole shielding device 10 further includes an outer cover 76 coupled to the outside of the lock housing 20, the outer cover 76 including the end wall 78 and the outer cover 76. The outer ring 76 further includes a first hole 82 extending from the outer surface of the end wall 78 to the inner surface, a second hole 84, and a third hole 86. The outer cover 76 further includes an end wall 78. A stop 88 extends from the inner surface. The annular wall 80 of the outer cover 76 is sleeved on the outer side of the base portion 22 of the lock base 20, and the end wall 78 is spaced apart from the base portion 22 in the longitudinal direction, and an accommodation space 90 is partitioned between the outer cover 76 and the lock seat 20, A hole 82 is aligned with the perforation 28, the second hole 84 is aligned with the first pivot portion 30, and the third hole 86 is aligned with the slot 36.

According to the first embodiment shown in the drawings of FIGS. 1-8, the keyhole shielding device 10 further includes a shielding member 40 pivotally connected to the lock base 20. The shielding member 40 includes a covering portion 42 and is separated from the covering portion 42. The opening portion 44, the shielding member 40 further includes a linkage rod 46 formed on the outer peripheral surface. The shielding member 40 is received in the accommodating space 90 between the outer cover 76 and the lock seat 20, and the pivot portion 44 of the shielding member 40 is pivotally connected to the second pivot portion 34, so that the shielding member 40 is defined by the second pivot portion 34. The pivot axis is a shielding position in which the axis covers the through hole 28 and the first hole 82 in the covering portion 42 (as shown in FIGS. 3 and 4) and the opening position of the opening portion 28 and the first hole 82 in the covering portion 42 (eg, 6, 7 shows the displacement between.

According to the first embodiment shown in the drawings of FIGS. 1-8, a first spring 48 is disposed between the shielding member 40 and the lock base 20. The first spring 48 includes a first leg 50 that is engaged with the shielding member 40. And a second leg 52 that is engaged with the second pivot portion 34. The first spring 48 is received in the annular groove 35 of the second pivot portion 34 and biases the shielding member 40 toward the shielding position (as shown in FIG. 3). .

According to the first embodiment shown in the drawings of FIGS. 1 to 8, the keyhole shielding device 10 further includes a lock block 58 with the first pivot portion 30, the lock block 58 including the first end surface and the concave portion a groove-shaped joint portion 64, and a pivoting groove 66 formed on the second end surface, the lock block 58 further includes four mutually spaced locking holes 68 formed on the end surface of the pivoting groove 66, each of the locking holes 68 and the joint portion 64, the lock block 58 further includes a flange 60 formed on the outer peripheral surface and a push rod 62 spaced apart from the flange 60 in the circumferential direction of the lock block 58. The pivoting slot 66 of the locking block 58 is pivotally coupled to the first pivot 30, allowing the locking block 58 to be in a locked position (as shown in Figures 6, 7) and a non-deflection axis defined by the first pivot 30 The locking position (as shown in FIGS. 3 and 4) is pivoted, and in the state in which the locking block 58 is in the locking position, the locking holes 68 of the locking block 58 are respectively aligned with the corresponding ones 32, and the locking block 58 is respectively engaged. The push rod 62 is coupled in conjunction with the linkage rod 46 of the shield member 40. In fact, the push rod 62 and the linkage rod 46 abut each other.

According to the first embodiment shown in the drawings of FIGS. 1-8, a magnet 54 is accommodated in each of the cavities 32 of the first pivot portion 30, and the magnets 54 and the bottom surface of the corresponding cavities 32 are accommodated. A second spring 56 is disposed, and each of the second springs 56 biases the corresponding magnet 54 toward the upper surface 24. In the state where the lock block 58 is in the locked position, each of the second springs 56 biases the corresponding magnet 54 into the lock block 58. Within the keyhole 68, the lock block 58 is locked by the magnets 54 and cannot be pivoted from the locked position to the unlocked position.

According to the first embodiment shown in the drawings of FIGS. 1 to 8, the keyhole shielding device 10 further includes a release button 70 slidably received in the slot 36 in the longitudinal direction, and is housed in the release button 70 and A return spring 74 between the end faces of the slots 36, the release button 70 includes a stop block 72 formed on the outer peripheral surface. The stop block 72 of the release button 70 is located outside the slot 36 and aligned with the stop 88 of the outer cover 76. The release button 70 allows displacement between a first position and a second position in the longitudinal direction, and at the release button 70 In the state of the first position, the stopper 72 of the release button 70 is longitudinally located on the movement path of the flange 60 of the lock block 58 (as shown in FIG. 5) and the stopper 72 abuts against the stopper 88. In a state where the release button 70 is in the second position, the stopper 72 of the release button 70 is located outside the movement path of the flange 60 of the lock block 58 in the longitudinal direction (as shown in Fig. 8).

Referring to FIGS. 2 and 3, for convenience of explanation, it is assumed that the shutter 40 of the keyhole shielding device 10 is in the open position, and in this state, the covering portion 42 of the shielding member 40 is separated from the through hole 28 and the first hole 82. In addition, when the shielding member 40 is in the open position, the locking block 58 is in the unlocking position, and the magnets 54 are disengaged from the locking holes 68 of the locking block 58 and are retracted in the corresponding pockets 32, and the release button 70 is in the first position. Causing the stop block 72 to block the lock block 58 from pivoting to the locked position by the unlocked position, so that the shield 40 remains in the open position, thus allowing the user's key to pass through the first hole 82, the perforation 28, and further insert the main switch lock The lock inside the 94 is unlocked.

When the first hole 82 and the through hole 28 are to be closed to prevent the main switch lock 94 from being broken, the release button 70 is pressed, causing the release button 70 to be displaced from the first position to the second position, so that the limit block 72 of the release button 70 is blocked. Displaced outside the path of movement of the flange 60 in the path of movement of the flange 60 of the lock block 58, while allowing the lock block 58 to be pivoted from the unlocked position to the locked position, further the first spring 48 biases the shield 40, resulting in The shield 40 is pivoted from the open position (as shown in Fig. 3) to the shield position (as shown in Fig. 6), and the linkage rod 46 of the shield 40 pushes the push rod 62 of the lock block 58, causing the lock block 58 to be The unlocked position (as shown in Figures 3 and 4) pivots to the locked position (as shown in Figures 6 and 7).

In a state where the shielding member 40 is in the shielding position, the locking block 58 is in the locking position, so that the magnets 54 are biased into the corresponding one of the locking holes 68 by the corresponding second springs 56, so that the locking block 58 is positioned in the locking position. Further, the shielding member 40 is held in the shielding position, and further, the limiting block 72 of the release button 70 is located below the flange 60 of the locking block 58 in the longitudinal direction, so that the release button 70 is held in the second position (such as the eighth Figure shows).

Displacement of the shield member 40 from the shield position to the open position in a state where the shield member 40 is in the shield position requires insertion of a magnet key 92 into the joint portion 64 of the lock block 58, the magnet and keyhole shielding device 10 in the magnet key 92. The inner magnets 54 are aligned but repelled, causing the magnets 54 in the keyhole shield 10 to be magnetically urged to compress the corresponding second springs 56 such that the magnets 54 are disengaged from the lock holes 68 of the lock block 58 allowing the use of the magnet key 92. The lock block 58 is pivoted from the locked position (as shown in Figure 6) to the unlocked position (as shown in Figure 3).

When the lock block 58 is pivoted from the locked position to the unlocked position, the push rod 62 of the lock block 58 pushes the linkage rod 46 of the shield 40, causing the shield 40 to pivot from the shielded position to the open position, and at the lock block 58 After turning to the unlocked position, the flange 60 of the lock block 58 is spaced from the stop block 72 of the release button 70 about the circumferential direction of the pivot axis defined by the first pivot portion 30, and thus the return spring 74 biases the release button 70. Displacement from the second position to the first position causes the stop block 72 of the release button 70 to be longitudinally located on the path of the flange 60 of the lock block 58 from the unlocked position to the locked position, further the lock block 58 is positioned in the non-lock position In the locked position, the shield 40 is held in the open position by the push rod 62 of the lock block 58.

The keyhole shielding device 10 of the first embodiment of the present invention can easily cause the shielding member 40 to be displaced from the open position to the shielding position by pressing the release button 70, which is highly convenient in use.

In addition to the keyhole shielding device 10 of the first embodiment shown in the drawings of Figs. 1 to 8, the keyhole shielding device 10 of the present invention can have other variations, such as the drawings of Figs. 9-11. In the keyhole shielding device 10 of the second embodiment, the keyhole shielding device 10 of the second embodiment of the present invention differs only in the interlocking lever 46 of the shielding member 40 compared to the keyhole shielding device 10 of the first embodiment. The arcuate guide groove 46A, the push rod 62 of the lock block 58 includes a pin 62A formed on the bottom surface, and the linkage rod 46 of the shield member 40 is located below the push rod 62 of the lock block 58 in the longitudinal direction, pushing the pin of the rod 62 The 62A is slidably received within the guide groove 46A of the linkage rod 46 so that as long as either one of the shield 40 or the lock block 58 pivots, the other will also pivot accordingly.

Referring to FIG. 10, when the shutter 40 is pressed in the open position, the release button 70 is pressed, and after the release button 70 is displaced from the first position to the second position, the shutter 40 is biased by the first spring 48 to be opened. The position pivots toward the shielded position, and the pusher lever 62 of the shutter 40 pushes the pusher lever 62 of the lock block 58 causing the lock block 58 to pivot from the unlocked position (as shown in FIG. 10) to the locked position (eg, 11th) Figure shows).

Referring to Fig. 11, after the shield member 40 is in the shielding position, after the lock of the lock block 58 is released using the magnet key 92, the magnet lock 92 is used to rotate the lock block 58 from the locked position to the unlocked position. The interlocking lever 46 is pressed by the pin 62A of the pusher lever 62 to cause the shield member 40 to pivot from the shielded position (as shown in Fig. 11) to the open position (as shown in Fig. 10).

The shielding member 40 of the keyhole shielding device 10 of the second embodiment of the present invention is coupled with the lock block 58 in either the open position or the shielding position, so that the lock block 58 is in the locked state in the state where the shielding member 40 is in the shielding position. The position is locked by the magnets 54 and cannot be pivoted. Therefore, in a state where the correct magnet key 92 is not used, the shutter 40 cannot be pivoted by the shielding position to the open position alone, that is, the shutter 40 is driven to be shielded by the shielding position. The transfer to the open position can only be achieved by operating the lock block 58 by means of the correct magnet key 92. Therefore, the keyhole shielding device 10 of the second embodiment of the present invention has further convenience in that it is convenient to operate the shield 40 to the shielding position. High anti-theft effect.

In addition, the keyhole shielding device 10 of each embodiment positions the shielding member 40 in the open position through the release button 70 in cooperation with the locking block 58, and pushes the shielding member 40 through the operating locking block 58, so that the shielding member 40 does not need to protrude outside the outer cover 76. The handle handles the displacement of the shield 40 from the open position to the shield position, further causing the keyhole shield 10 of the various embodiments to maintain a circular outer contour and without the object protruding from the peripheral surface of the outer cover 76, which is advantageous The keyhole shielding device 10 is installed in a narrow space on a locomotive of various models.

The basic teachings of the present invention have been described, and many extensions and variations will be apparent to those of ordinary skill in the art. For example, the lock block 58 is not only in the form of magnet locking and unlocking, and the lock block 58 can also be replaced by a commercially available lock but not limited to a commercially available lock to further unlock the lock. It can be achieved using a metal key, and it is readily accessible to those skilled in the art to replace the lock block 58 with a lock core in accordance with the teachings of the present invention.

Moreover, the surface of the release button 70 does not necessarily require the use of the stop block 72 with the flange 60 of the lock block 58 to position the lock block 58 in the unlocked position to further cause the shield 40 to remain in the open position, for example, the stop block 72. The outer peripheral surface forms a slit through which the flange 60 is allowed to pass, and the stopper 72 is placed on the movement path of the flange 60, and the slit is longitudinally and flanged in a state where the release button 70 is in the first position. 60 is spaced so that the lock block 58 can be positioned in the unlocked position, and the slit is aligned longitudinally with the flange 60 in a state where the release button 70 is moved to the second position, further allowing the lock block 58 to be shielded 40 The push is displaced from the unlocked position to the locked position.

The present invention disclosed in the specification is intended to be illustrative and not restrictive. The scope of the present invention is defined by the scope of the appended claims, and is not intended to

10‧‧‧Keyhole shielding device 20‧‧‧Lock seat 22‧‧‧ Base 24‧‧‧ Upper surface 26‧‧‧ Lower surface 28‧‧‧Perforated 30‧‧‧First pivot 32‧‧‧ 34‧‧‧Second pivot 35‧‧‧ Ring groove 36‧‧‧Slot 38‧‧‧Set 40‧‧‧Shield 42‧‧‧ Covering section 44‧‧‧Block 46‧‧‧ linkage rod 46A‧‧‧ Guide slot 48‧‧‧First spring 50‧‧‧First foot 52‧‧‧Second foot 54‧‧‧Magnetic 56‧‧‧Second spring 58‧‧‧Lock block 60‧‧‧ convex Edge 62‧‧‧Pushing rod 62A‧‧‧ Pin 64‧‧‧ Jointing section 66‧‧‧ pivoting groove 68‧‧‧Keyhole 70‧‧‧ release button 72‧‧‧Limit block 74‧‧‧Return spring 76‧‧‧The outer cover 78‧‧‧End wall 80‧‧‧Round wall 82‧‧ First hole 84‧‧ Second hole 86‧‧ Third hole 88‧‧‧ Block 90‧‧‧ Space 92‧‧‧Magnetic Key 94‧‧‧Main Switch Lock

Fig. 1 is an exploded perspective view showing a keyhole shielding device according to a first embodiment of the present invention. Fig. 2 is a combination view of Fig. 1 and Fig. 3 is a cross-sectional view taken along line 3-3 of Fig. 2. Figure 4 is a cross-sectional view taken along line 4-4 of Figure 3. Fig. 5 is a cross-sectional view taken along line 5-5 of Fig. 3. Fig. 6 is a view showing a state in which the shield member is pivoted to the shielding position in a state where the shield member is in the open position shown in Fig. 3. Figure 7 is a cross-sectional view taken along line 7-7 of Figure 6. Figure 8 is a cross-sectional view taken along line 8-8 of Figure 6. Figure 9 is an exploded perspective view of a keyhole shielding device in accordance with a second embodiment of the present invention. Figure 10 is a combined transverse cross-sectional view of Figure 9 and showing the shield in an open position. Figure 11 is a state diagram of the shield from the open position to the displacement to the shielding position.

The drawings are merely for the purpose of explaining the basic teachings, and the description of the number, the position, the relationship, and the size of the components of the embodiments will be explained or the technical skills will be read after reading and understanding the following description. In addition, after reading and understanding the following descriptions, changes in the exact dimensions and size ratios associated with specific forces, weights, strengths, and similar requirements are also industry skills.

In the different figures, the same reference numerals are used to designate the same or similar elements; in addition, please refer to the text such as "top", "bottom", "first", "second", "forward", "backward", "reverse" To "," "front", "back", "height", "twist", "length", "end", "side", "horizontal", "vertical", etc. and similar terms are only for the viewer The constructions in the figures are for reference only to aid in the description of the embodiments.

10‧‧‧Keyhole shielding device

20‧‧‧Lock seat

22‧‧‧ base

24‧‧‧ upper surface

26‧‧‧ Lower surface

28‧‧‧Perforation

30‧‧‧ First pivot

32‧‧‧ 容容

34‧‧‧Second pivot

35‧‧‧ Ring groove

36‧‧‧Slots

38‧‧‧Sets

40‧‧‧Shield

42‧‧‧ Covering Department

44‧‧‧Band

46‧‧‧ linkage rod

48‧‧‧First spring

50‧‧‧ first foot

52‧‧‧second foot

54‧‧‧ Magnet

56‧‧‧Second spring

58‧‧‧Lock block

60‧‧‧Flange

62‧‧‧Pushing rod

64‧‧‧Combination Department

66‧‧‧ pivot slot

68‧‧‧Keyhole

70‧‧‧ release button

72‧‧‧Limited blocks

74‧‧‧Return spring

76‧‧‧ Cover

78‧‧‧End wall

80‧‧‧Circle

82‧‧‧ first hole

84‧‧‧ second hole

86‧‧‧ third hole

88‧‧‧block

Claims (9)

A keyhole shielding device comprising: a lock base comprising an upper surface and a lower surface spaced apart along a longitudinal direction, the lock seat further comprising a perforation extending from the upper surface to the lower surface in the longitudinal direction, the lock seat further comprising a first pivot portion and a slot separated from the perforation; an outer cover fixed to the outer side of the lock seat, the outer cover further comprising a first hole, a second hole and a third through the end wall An accommodating space is defined between the outer cover and the lock seat, and the first hole of the outer cover is aligned with the through hole, and the second hole is aligned with the first pivot portion, and the third hole The hole is aligned with the slot; a shielding member is received in the accommodating space, the shielding member includes a linkage rod, and the shielding member can cover a hole and a shielding position of the first hole and open the hole and the first hole Displacement between an open position; a first spring received between the shielding member and the lock seat, the first spring biasing the shielding member toward the shielding position; a locking block pivotally coupled to the first pivot portion and Second hole pivoting, lock block package a push rod coupled with the linkage rod of the shielding member, the lock block pivots between the locked position and the unlocked position with the first pivot portion as a pivot axis; a release button, the movable slot and the slot and the third The hole is coupled, the release button is displaceable along a slot in a first position blocking the lock block and a second position not blocking the lock block; a return spring disposed in the slot and located at the release button and the slot Between the end faces, the return spring biases the release button toward the first position; in the state where the shield is in the open position, the lock block is in the unlocked position, and the release button is in the first position, causing the lock block to be positioned in the non-locking position Positioning and the shielding member is positioned at the open position, and the first spring biasing shield is displaced from the open position to the shielding position in a state where the shielding member is in the open position and the release button is displaced from the first position to the second position to release the locking block And the linkage lever biasing lock block is displaced from the unlocked position to the locked position, causing the lock block to be locked and the release button to remain in the second position, the lock block being unlocked and pivoted by the locked position A state of non-lock position, the push lever biases interlocking lever causes the shield member moves to the open position by a bit masking, and a second release button to move from the first bit position. The keyhole shielding device of claim 1, wherein the lock block further comprises a flange spaced apart from the push rod about a circumferential direction of the first pivot portion, the release button further comprising a limit formed on the outer peripheral surface a block; in a state where the lock block is in the unlocked position and the release button is in the first position, the limit block of the release button blocks the movement path of the flange of the lock block, causing the lock block to be positioned in the unlocked position, in the lock When the block is in the unlocked position and the release button is in the second position, the limit block of the release button is outside the movement path of the flange of the lock block, allowing the lock block to be biased by the shield bias from the unlocked position to In the locked position, in the state where the lock block is in the locked position, the limit block of the release button abuts against the lower side of the flange of the lock block in the longitudinal direction. The keyhole shielding device of claim 1, wherein the outer cover further comprises an end wall spaced apart from the upper surface of the lock seat in a longitudinal direction, the outer cover further comprising a side surface formed on the end wall and facing upward a stopper extending from the surface but spaced apart from the upper surface; the release button abuts against the stopper in a state where the release button is in the first position; and the release button is longitudinally and stoppered in a state where the release button is in the second position Separated. The keyhole shielding device of claim 1, wherein the linkage rod of the shielding member is aligned with the push rod of the lock block in the longitudinal direction, and the linkage rod and the push rod abut each other. The keyhole shielding device of claim 4, wherein the lock block further comprises a flange spaced apart from the push rod about a circumferential direction of the first pivot portion, the release button further comprising a limit formed on the outer peripheral surface a block; in a state where the lock block is in the unlocked position and the release button is in the first position, the limit block of the release button blocks the movement path of the flange of the lock block, causing the lock block to be positioned in the unlocked position, in the lock When the block is in the unlocked position and the release button is in the second position, the limit block of the release button is outside the movement path of the flange of the lock block, allowing the lock block to be biased by the shield bias from the unlocked position to In the locked position, in the state where the lock block is in the locked position, the limit block of the release button abuts against the lower side of the flange of the lock block in the longitudinal direction. The keyhole shielding device of claim 4, wherein the outer cover further comprises an end wall spaced apart from the upper surface of the lock seat in a longitudinal direction, the outer cover further comprising a side surface formed on the end wall and facing upward a stopper extending from the surface but spaced apart from the upper surface; the release button abuts against the stopper in a state where the release button is in the first position; and the release button is longitudinally and stoppered in a state where the release button is in the second position Separated. The keyhole shielding device of claim 1, wherein the linkage rod of the shielding member comprises a guiding groove, the pushing rod of the locking block further comprises a pin formed on the bottom surface, and the pushing rod of the locking block is located in the longitudinal direction. Below the linkage rod of the piece, the pin of the push rod is slidably received in the guide groove of the linkage rod, causing the shield member to be displaced between the open position and the shield position, and the interlocking lock block pivots between the unlocked position and the locked position. . The keyhole shielding device of claim 7, wherein the lock block further comprises a flange spaced apart from the push rod about a circumferential direction of the first pivot portion, the release button further comprising a limit formed on the outer peripheral surface a block; in a state where the lock block is in the unlocked position and the release button is in the first position, the limit block of the release button blocks the movement path of the flange of the lock block, causing the lock block to be positioned in the unlocked position, in the lock When the block is in the unlocked position and the release button is in the second position, the limit block of the release button is outside the movement path of the flange of the lock block, allowing the lock block to be biased by the shield bias from the unlocked position to In the locked position, in the state where the lock block is in the locked position, the limit block of the release button abuts against the lower side of the flange of the lock block in the longitudinal direction. The keyhole shielding device of claim 7, wherein the outer cover further comprises an end wall spaced apart from the upper surface of the lock seat in a longitudinal direction, the outer cover further comprising a side surface formed on the end wall and facing upward a stopper extending from the surface but spaced apart from the upper surface; the release button abuts against the stopper in a state where the release button is in the first position; and the release button is longitudinally and stoppered in a state where the release button is in the second position Separated.