JP4177283B2 - Door lock - Google Patents

Description

  The present invention relates to a door lock applied to a door that swings around a vertical axis. The door lock of the present invention incorporates an opening support mechanism for forcibly opening the door in conjunction with the unlocking operation of the door handle.

  As the building becomes more airtight, for example, a phenomenon that makes it difficult to open the door outward due to a pressure difference between a low-pressure room and a high-pressure room has become a problem. Especially in high-rise apartments, the doors may be exposed to strong winds, and a large operating force may be required to open the doors. Even in a low-rise house, when the fan is continuously operated, the same phenomenon occurs when the indoor atmospheric pressure decreases.

  In order to cope with such a problem, it is known in Patent Document 1 to provide an opening support mechanism in a door, for example. There, a support lever that swings indoors and outdoors is arranged on the side end surface of the door, and the front end of the support lever is pressed against the door frame so that the door can be forcibly opened. Specifically, an assist handle that can be pushed and pulled with respect to the panel surface of the door is provided, and the assist lever is swung after the assist handle push-pull operation is converted into a rotation operation. Patent Document 2 discloses a similar opening support mechanism, except that a sliding window is an application target.

JP 2000-291329 A (paragraph number 0021, FIG. 1) JP-A-8-135301 (paragraph number 0014, FIG. 4)

  The opening support mechanism of Patent Document 1 can forcibly open the door with a support lever that is swung by an assist handle. However, when an opening support mechanism is provided at the entrance door, it is necessary to provide a door lock separately from the opening support mechanism. Furthermore, since it is necessary to provide a knob and a handle for unlocking the door lock latch separately from the assist handle, the overall structure of the door becomes complicated and the cost is increased accordingly. Each time the door is opened, it is necessary to return the assist handle to the standby position, which is troublesome.

  An object of the present invention is to provide a door lock that can switch the opening support mechanism using the unlocking operation of the door lock, thus simplifying the overall structure of the door and reducing the overall cost, and allowing the door to be opened easily. It is to provide. The object of the present invention can be applied to an existing door, of course, can be replaced with an existing door lock and an opening support function can be added to the door, and can be easily attached to the door like an existing door lock, The object is to provide a door lock with excellent versatility and workability.

In the present invention, a latch 9, a first spring 26 for advancing and biasing the latch 9, and a latch 9 are retracted against the biasing force of the first spring 26 inside a case 7 attached to the door panel 1. In the door lock provided with the latch lever 30 and the operation tool 10 for rotating the latch lever 30 from the outside of the case, the case 7 moves into the case 7 in conjunction with the retreating operation of the latch 7, opening assistance mechanism and the door frame 2 abutment to include the assist member 43 for forcibly opening operation of the door panel 1 that provided. The opening support mechanism includes an assist body 43 that is guided and supported so as to be slidable in a reciprocating manner, a second spring 44 that retreats and biases the assist body 43, and an advance operation of the assist body 43 against the biasing force of the second spring 44. And an assist lever 45. The assist lever 45 is operated by the latch lever 30 and can advance the assist body 43 while swinging in the opposite direction to the latch lever 30. When the latch 9 is retracted in the unlocking direction by the latch lever 30, the assist body 43 is advanced by the assist lever 45 and applied to the striker 4 so that the door panel 1 can be forcibly opened. A guide groove 21 that guides and supports the assist body 43 so as to be slidable back and forth is formed from the engaging end of the latch 9 toward the other end, and the guide groove 21 is in a state where the assist body 43 is within the outline of the latch 9. It is configured to be able to move forward from the engagement end of the latch 9 to the outside of the case 7.

  The striker 4 is integrally provided with a cam piece 41 that receives the protruding end of the assist body 43 and generates a component force in the door opening direction.

  The interlocking timing of the latch lever 30 and the assist lever 45 is set so that the assist body 43 can be brought into contact with the striker 4 to open the door panel 12 after the latch 9 is detached from the receiving hole 40 of the striker 4.

  The latch lever 30 includes a first operation arm 35 that retracts the latch 9 and a second operation arm 36 that rotates the assist lever 45. The assist lever 45 includes a first operation piece 52 that advances the assist body 43 and a second operation piece 53 that is rotated by the second operation arm 36 in the reverse direction. The latch lever 30 and the assist lever 45 are arranged on one side of the latch 9 so as to be adjacent to each other, and the first operation arm 35 of the latch lever 30 and the first operation piece 52 of the assist lever 45 are It is accommodated in the operation recess 23 formed in the notch so as to face the guide groove 21 and comes into contact with the passive surface 27 of the latch 9 and the passive surface 49 of the assist body 43, respectively.

  The latch lever 30 is pivotally biased toward the standby posture by the third spring 31 so that the operating force of the operation tool 10 is released so that the latch lever 30 can return to the standby position, and the assist lever 45 is retracted. The standby position where the first operating piece 52 comes into contact with the assist body 43 in the state, the operating position where the assist body 43 protrudes out of the case, and the second position beyond the standby position when the latch lever 30 returns to the standby position. The operating arm 36 can be pivotally displaced to the retracted position where the operating arm 36 retracts and swings out of the return stroke. The assist lever 45 is urged to return from the retracted position to the standby position by a fourth spring 46 having a smaller spring force than the second spring 44. In a state where the assist lever 45 is in the operating position, the assist lever 45 and the assist body 43 are returned to the standby position by the second operation arm 36 getting over the second operation piece 53 and rotating to the limit rotation position. I can move. When the latch lever 30 returns to the standby position, the second operating arm 36 rotates and returns while the second operating piece 53 rotates from the standby position to the retracted position. The engagement state with the piece 53 is released, so that the assist lever 45 can self-return from the retracted position to the standby position.

  In the present invention, in the door lock provided with the latch 9, the first spring 26, the latch lever 30 for operating the latch 9 and the operation tool 10, the door panel 1 is forcibly opened in the case 7. The opening support mechanism including the body 43 is provided, the assist body 43 is moved out of the case in conjunction with the retraction operation of the latch 7, and the door panel 1 is forcibly brought into contact with the door frame 2. Therefore, the door panel 1 can be reliably opened even when there is a pressure difference between the inside and outside of the room.

  Since the opening support mechanism is incorporated in the case 7 of the door lock, a door structure having an opening support function can be obtained simply by incorporating the door lock into the door panel 1, and an opening support mechanism is provided separately from the door lock. Compared with the conventional door structure that is necessary, the overall structure of the door can be simplified and the overall cost can be reduced. The space required for incorporating the door lock and the opening support mechanism can also be reduced.

  The opening support mechanism includes an assist body 43 that can reciprocate and slide, a second spring 44 that retreats and biases the assist body 43, and an assist lever 45 that advances the assist body 43, and the latch 9 is released by the latch lever 30. When the retraction operation is performed in the locking direction, the assist body 43 is advanced to the outside of the case 7 by the assist lever 45 interlocked with the latch lever 30, so that the assist body 43 is brought into contact with the striker 4 only by unlocking the latch 9. This allows the door panel 1 to be forcibly opened. Therefore, the door panel 1 can be reliably opened by a simple operation of simply unlocking the operation tool 10, and the opening operation of the door can be simplified to the extent that no secondary operation is required. There is no waste in the opening operation of the door panel 1 as compared with the conventional device that requires the door lock and the opening support mechanism to be provided separately.

  If the striker 4 is provided with a cam piece 41 and the protruding end of the assist body 43 is received by the cam piece 41 so as to generate a component force in the door opening direction, the door panel 1 can be opened by simply moving the assist body 43 forward and sliding. Therefore, the operation of the assist body 43 is simplified, the structure of the opening support mechanism is simplified correspondingly, and the reliability of the door lock can be improved. Since it is not necessary to separately provide a metal fitting for receiving the assist body 43, the entire structure of the door lock including the striker 4 can be simplified.

  According to the door lock that opens the door panel 12 by applying the assist body 43 to the striker 4 after the latch 9 is released from the receiving hole 40 of the striker 4, the time from when the assist body 43 starts to advance until it strikes the striker 4 Therefore, even when the retraction timing of the latch 9 is delayed due to rattling between the latch 9 and the latch lever 30, it is possible to reliably prevent the assist body 43 and the latch 9 from buffering the operation. it can. When there is no pressure difference between the inside and outside of the room, there is an advantage that the door panel 1 can be opened easily without the need to advance the assist body 43.

  According to the opening support mechanism in which the guide groove 21 is formed in the latch 9 and the assist body 43 is loaded in the guide groove 21 while being within the outline of the latch 9, the space occupied by the latch 9 in the case 7 is utilized. Since the assist body 43 can be arranged, the door lock incorporating the opening support mechanism can be made compact in size. Therefore, the door lock incorporating the opening support mechanism can be applied to the existing door panel 1, and the door lock of the present invention can be replaced with the existing door lock to add the opening support function to the door. Since it can be easily attached to the door in the same way as existing door locks, the versatility and workability of the door locks are improved despite having an opening support function.

  The latch lever 30 and the assist lever 45 are arranged adjacent to one side of the latch 9, and the first operation arm 35 and the first operation piece 52 of both 30 and 45 are accommodated in the operation recess 23, respectively. 27, and the door lock that is in contact with the passive surface 49 of the assist body 43, the latch 9 and the latch lever 30 and the opening support mechanism can be centrally arranged in one place to further reduce the size of the door lock.

  When the second operation arm 36 moves over the second operation piece 53 and rotates to the limit rotation position, the assist lever 45 and the assist body 43 are moved back to the standby position, and the assist panel 43 opens the door panel 1. After that, it is possible to smoothly release the door panel 1 while avoiding the assist body 43 from being caught in the receiving hole 40 of the striker 4. It is possible to save the trouble of operating the operation tool 10 and returning the assist body 43 to the standby position. Further, if the assist lever 45 can be self-returned from the retracted position to the standby position in conjunction with the standby rotation operation of the latch lever 30, it is possible to eliminate the need to reset the assist lever 45 and to prevent the conventional door lock. In the same manner as described above, a series of operations including the unlocking operation of the latch 9 and the switching operation operation of the opening support mechanism can be completed only by operating the operation tool 10.

(Example) FIG. 1 thru | or 6 shows the Example of the door lock provided with the opening assistance mechanism based on this invention. 2 and 3, reference numeral 1 denotes a door panel, 2 denotes a door frame, and 3 denotes a door packing. The door lock of the present invention is fitted and attached to the side end surface of the door panel 1. A striker 4 is fastened and fixed to the door frame 2 facing the side end face of the door lock. The door panel 1 is supported by a hinge on the side end (not shown), and can swing open and close around the vertical axis.

  In FIG. 4, the door lock is linked to the square box-shaped case 7, the dead bolt 8 and the latch 9 disposed above and below the case 7, an operation mechanism for switching both of them, and the retracting operation of the latch 9. And an opening support mechanism for forcibly opening the door panel 1.

  Inside and outside of the door panel 1, a door handle (operating tool) 10 for unlocking the latch 9 through an operation mechanism, a known lock part such as a thumb turn knob, and a cylinder lock will be provided. Is not shown. A fastening seat 7a is formed at the side end of the case 7, and a dead bolt 8 and a latch 9 opening / closing opening are opened in the middle of the upper and lower sides. In FIG. 3, the opening surface of the case 7 is closed by a case lid 11, and the case lid 11 and the case 7 regulate the lateral movement of the dead bolt 8 and the latch 9 and an assist body 43 described later. Yes.

  In FIG. 4, the dead bolt 8 is made of a die-cast rectangular metal block, and is supported by a pair of front and rear guide pins 14 fixed to the case 7 with a slide groove 13 formed in the middle part thereof. 7 is guided and supported so as to be slidable in the front-rear direction. By moving the dead bolt 8 in the front-rear direction with the switching lever 15 disposed above the rear end of the case 7, the end portion of the dead bolt 8 appears and disappears from the exit / retract opening and is engaged with and disengaged from the striker 4.

  The switching lever 15 is connected to a thumb turn knob and a cylinder lock via a thumb turn shaft 16 (see FIG. 2) through which the boss portion penetrates in and out, and can be locked or unlocked from the inside or outside of the door panel 1. . Reference numeral 17 denotes an engaging recess that inherits the operation of the switching lever 15, and 18 denotes a click plate that causes the switching lever 15 to feel a click.

  The latch 9 includes a square shaft-shaped latch main body 9a made of a plastic molded product, and a stainless steel reinforcing plate 9b fixed to an engagement end rounded in a partial arc shape. A guide groove 21 is formed in the latch body 9 a from the engagement end toward the other end side. A clearance groove 22 is opened at the groove bottom of the guide groove 21, and a lower side facing the guide groove 21 is formed. An operation recess 23 is formed in the circumferential wall of the groove, and a partial arc-shaped escape notch 24 is formed continuously from the operation recess 23 at the rear end of the latch body 9a.

  In FIG. 2, the latch 9 is guided and supported by three guide pins 25 fixed to the case 7 so as to be slidable in the front-rear direction, and is arranged between the rear wall of the case 7 and the rear end of the latch 9. The spring 26 is urged to advance forward. The first spring 26 is a compression coil type spring. The rear side surface of the guide groove 21 adjacent to the upper side of the escape notch 24 is a passive surface 27 that is unlocked by the first operating arm 35 of the latch lever 30.

  In the case 7, a latch lever 30 for moving the latch 9 backwardly against the urging force of the first spring 26 is disposed below and behind the latch 9 incorporated in the case 7. A third spring 31 for rotating the latch lever 30 to return to the standby position and a return piece 32 for transmitting the elastic force of the third spring 31 are disposed below. The return piece 32 guides and supports only the front and rear slides by the partition wall 33 and the case lower wall incorporated in the case 7.

  The latch lever 30 is integrally provided with a first operation arm 35 for retracting the latch 9, a second operation arm 36 for rotating an assist lever 45 described later, and a spring receiving arm 37 for receiving the return piece 32. It is made of a die-cast molded product, and is connected to the door handle 10 via a handle shaft 38 (see FIGS. 2 and 3) penetrating the boss portion inward and outward. The latch lever 30 is rotatably supported by the case 7 and the case lid 11 with shaft portions provided at both ends of the boss portion, and is rotated in the unlocking direction by guide pins 25 that guide the lower surface side of the latch 9. A movement limit is defined, and a rotation limit in the reverse direction is defined by a pin 34 (see FIG. 2) that receives the spring receiving arm 37.

  In FIG. 1, the striker 4 is formed of a vertically long rectangular press-molded product made of a stainless steel plate material, and a receiving hole 40 that engages with the dead bolt 8 and the latch 9 is formed on the plate surface. A cam piece 41 is integrally bent and formed on the lower half of the peripheral edge 40 on the indoor side. The cam piece 41 is inclined obliquely, and when an assist body 43 (described later) hits the cam piece 41, a component force toward the outdoors is generated in the assist body 43. With this component force, the door panel 1 can be forcibly opened.

  In the present invention, an opening support mechanism is incorporated in the door lock having the above-described configuration. The opening support mechanism includes an assist body 43 that is guided and supported by a guide groove 21 provided in the latch 9 so as to be reciprocally slidable, a second spring 44 that retreats and biases the assist body 43 backward, and an assist body 43 that An assist lever 45 that moves forward against the biasing force of the two springs 44 and a fourth spring 46 that swings and biases the assist lever 45 to the return posture are included. These mechanisms are switched by utilizing the rotation operation of the latch lever 30 in the unlocking direction.

  The assist body 43 is composed of a die-cast metal block that is long in the front and rear, and has a protruding claw 48 that comes into contact with the cam piece 41 of the striker 4 at the front, and a step provided in the middle in the longitudinal direction is an assist. The passive surface 49 is operated by the first operation piece 52 of the lever 45. On the slide surface of the assist body 43 facing the groove bottom of the guide groove 21, a recess 51 for accommodating the fourth spring 46 and the spring seat 50 formed on the case 7 is formed (see FIG. 3).

  The assist lever 45 is formed of a press fitting including a first operation piece 52 for advancing the assist body 43 and a second operation piece 53 that is rotated in the reverse direction by the second operation arm 36. A fixed pin 54 is pivotally supported. Reference numeral 55 denotes a latch pin for the fourth spring 46.

  In FIG. 2, the latch lever 30 and the assist lever 45 are disposed adjacent to the lower side of the latch 9, and the first operation arm 35 and the first operation piece 52 are guided through the operation recess 23 to guide grooves. 21 is in contact with the corresponding passive surfaces 27 and 49. The fourth spring 46 is a torsion coil spring, and its spring force is set to be sufficiently smaller than the spring force of the second spring 44. The fourth spring 46 works to urge the assist lever 45 from the retracted position to the standby position, which will be described later.

  Next, the locking and unlocking operations of the door lock and the operation of the opening support mechanism interlocked with the latch 9 will be described. In a state where the door lock is locked, as shown in FIG. 2, the dead bolt 8 engages with the receiving hole 40 of the striker 4 to restrict the opening swing of the door panel 1. When the thumb turn knob on the indoor side or the cylinder lock on the outdoor side is operated from this state, the dead bolt 8 is retracted into the case 7 and the door lock can be held in the unlocked state.

  After the dead bolt 8 is unlocked as described above, the latch lever 30 is opposed to the return piece 32 and the third spring 31 by tilting the horizontal door handle 10 to the floor surface. , The first operating arm 35 pushes the passive surface 27, and the entire latch 9 is retracted against the first spring 26. As a result, the engagement end of the latch 9 comes out of the receiving hole 40 of the striker 4 and further retracts to the exit / retreat opening of the case end. Only in this state is the tip of the second operating arm 36 of the latch lever 30 in contact with the second operating piece 53 of the assist lever 45 so that both levers 30 and 45 can be interlocked.

  When the door handle 10 is subsequently tilted, the first operating arm 35 of the latch lever 30 rotates along the relief notch 24 on the latch 9 side as shown in FIG. The second operation piece 53 is rotated in the reverse direction. As a result, the assist body 43 is advanced forward by the first operation piece 52 of the assist lever 45. That is, the assist body 43 is advanced to the state where the latch 9 is completely unlocked / retracted. At this time, since the escape notch 24 is received by the first operation arm 35, the latch 9 does not move out of the case and maintains the retracted posture. The spring arm of the fourth spring 46 is received by a latch pin 55 (see FIG. 5).

  As shown by the broken line in FIG. 1, the assist body 43 that moves forward toward the striker 4 is opposite to the contact portion in the same size as the advancement output by the protrusion 48 contacting the bent base end of the cam piece 41. Receives reaction force R in the direction. Out of the reaction force R, the outdoor reaction force R1 acts on the assist body 43. As a result, the door panel 1 is forcibly operated in the opening direction. Moreover, since the reaction force R1 directed to the outdoors acts on the swinging tip of the door panel 1, a large opening moment acts on the door panel 1, and the door panel 1 can be reliably secured even when there is a pressure difference between the room and the outdoors. Moreover, it can be easily opened. In this way, if there is even a slight gap between the door panel 1 and the door packing 3, the pressure difference between the inside and outside of the room can be quickly eliminated, and thereafter the door panel 1 can be opened more easily.

  Eventually, the assist body 43 will advance to the position indicated by the solid line in FIG. 1, but if the door panel 1 is further opened in this state, the protrusion 48 of the assist body 43 will enter the receiving hole 40 of the striker 4. I get caught. In order to prevent such a contact buffering of the protruding claw 48, the assist body 43 can quickly return and retract at the same time that the protruding claw 48 finishes moving to the limit position.

  Specifically, as shown in FIG. 5, when the latch lever 30 is rotated to a position just before the limit position, the second operating arm 36 gets over the tip of the second operating piece 53, thereby disengaging the two. It is made to do. As a result, the assist body 43 is slid back to the original standby position by the second spring 44, and the assist lever 45 is also rotated by the assist body 43 in the clockwise direction. Accordingly, the protrusion 48 is not caught in the receiving hole 40. The assist lever 45 is received by the fourth spring 46 and held at the standby position.

  When the latch lever 30 is rotated to the limit position, the first operating arm 35 is received by the guide pin 25 as shown in FIG. 6, so that the door handle 10 cannot be tilted any further. When the operating force is released in this state, the latch lever 30 is pushed by the return piece 32 by the spring force of the third spring 31, and rotates counterclockwise in FIG. As a result, the engagement between the first operating arm 35 and the relief notch 24 is released, so that the latch 9 slides back to the standby position by the spring force of the first spring 26.

  At this time, the second operation piece 53 of the assist lever 45 protrudes within the return rotation locus of the second operation arm 36 of the latch lever 30. Therefore, while the latch lever 30 is returned to the standby position, the assist lever 45 is forcibly turned clockwise to elastically deform the spring arm of the fourth spring 46, and the second operation piece 53. Rotates to the retracted position outside the tip rotation locus of the second operation arm 36. Thereafter, since the second operating arm 36 gets over the tip of the second operating piece 53, the assist lever 45 is rotated back from the previous retracted position to the standby position by the spring force of the fourth spring 46 and held in the standby position. Is done. That is, the fourth spring 46 is provided only for rotating the assist lever 45 from the retracted position to the standby position.

  As described above, according to the door lock of the present invention, the opening support mechanism is incorporated in the case 7, and the assist body 43 of the opening support mechanism is attached to the striker 4 using the unlocking operation of the latch 9 by the door handle 10. Since the door panel 1 is forcibly opened, the overall structure of the door can be simplified and the cost thereof can be reduced as compared with a conventional opening support mechanism that must be provided separately from the door lock. The opening support mechanism can be switched by a simple operation just by performing a door opening operation similar to a conventional door lock. The space occupied by the latch 9 in the case 7 is used to house the assist body 43 in the outline thereof, so that the door lock having the opening support mechanism can be made compact and the door lock can be replaced. In addition, the door lock can be mounted using the mounting hole formed in the door panel 1 as it is.

  FIG. 7 shows another embodiment of the present invention relating to the striker 4. The striker 4 is configured by the striker body 4a, the case 4b having a U-shaped cross section fixed to the inner surface of the striker body 4a, and the cam piece 41 mounted and fixed in the case 4b. Is different. The striker body 4a and the case 4b are press-molded products made of stainless steel plate materials, and the cam pieces 41 are plastic molded products.

  After the door panel 1 is forcibly opened by the assist body 43, the door panel 1 that has received the wind pressure may be pushed back and closed. In order to prevent such a door closing operation against the user's intention, the door panel 1 can be held open by using the latch 9. As shown in FIG. 8, in the state where the latch 9 has advanced to the limit position, the angular shaft portion near the engagement end is received by the side edge 4a on the outdoor side of the striker 4 so as to receive the wind pressure. Can be prevented from closing and moving.

  In addition to the above embodiment, the assist body 43 is preferably disposed within the outline of the latch 9, but if necessary, only a part of the assist body 43 can be slidably guided and supported by the guide groove 21. . The return piece 32 can be omitted, and the latch lever 30 can be directly urged to rotate by the third spring 31. The third spring 31 may be formed of a torsion coil spring. In conjunction with the movement of the latch 9 to move away from the receiving hole 40 of the striker 4, the interlock timing of both 30 and 45 can be set so that the assist body 43 can be advanced and the door panel 12 can be opened.

  The opening support mechanism of the present invention can also be applied to a door lock with a latch 9 from which the dead bolt 8 is omitted. The operation tool 10 may be composed of a lever structure handle or a knob. If necessary, the operating tool may be a push-pull handle. In this case, the push-pull operation of the push-pull handle is converted into a rotation operation similar to that of the latch lever 30, and the latch 9 is unlocked. At the same time, the assist body 43 can be advanced.

It is a cross-sectional top view of a door lock. It is a vertical side view of a door lock. It is a cross-sectional top view which shows the locking structure of a latch and a striker. It is a disassembled perspective view of a door lock. It is a vertical side view which shows the door opening operation | movement of an assist body. It is a vertical side view which shows reset operation of an assist lever. It is a cross-sectional top view which shows another Example of a striker. It is a cross-sectional top view which shows another Example of a latch.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Door panel 2 Door frame 4 Striker 7 Case 9 Latch 10 Operation tool 12 Door panel 21 Guide groove 23 Operation recessed part 26 1st spring 27 Passive surface 30 of a latch Latch lever 31 3rd spring 35 1st operation arm 36 2nd operation arm 40 Hole 41 Cam piece 43 Assist body 44 Second spring 45 Assist lever 46 Fourth spring 49 Passive surface 52 of the azimuth body First operation piece 53 Second operation piece

Claims (5)

Inside the case (7) attached to the door panel (1), a latch (9), a first spring (26) for advancing and energizing the latch (9), and a latch (9) of the first spring (26) A door lock comprising a latch lever (30) for retreating against an urging force and an operating tool (10) for rotating the latch lever (30) from the outside of the case,
The case (7) includes an assist body (43) that moves forward out of the case in conjunction with the retracting operation of the latch ( 9 ) and forcibly opens the door panel 1 in contact with the door frame (2). An opening support mechanism is provided ,
The opening support mechanism includes an assist body (43) that is guided and supported so as to be slidable back and forth, a second spring (44) that retreats and urges the assist body (43), and an assist body (43) that is supported by the second spring (44). ) And an assist lever (45) operated to advance against the urging force of
The assist lever (45) is operated by the latch lever (30), and the assist body (43) can be advanced while swinging in the opposite direction to the latch lever (30).
When the latch (9) is retracted in the unlocking direction by the latch lever (30), the assist body (43) is advanced by the assist lever (45) and applied to the striker (4), and the door panel (1) is moved. It can be forcibly opened,
A guide groove (21) for guiding and supporting the assist body (43) so as to be slidable back and forth is formed from the engagement end of the latch (9) toward the other end,
The assist body (43) is loaded in the guide groove (21) so as to be within the outline of the latch (9), and is configured to move forward from the engagement end of the latch (9) to the outside of the case (7). door lock, characterized in that is. A striker (4), door lock according to claim 1, wherein the cam piece which makes it received the tip of the assist member 43 results in a component force of the door opening direction (41) is provided integrally. After the latch (9) is disengaged from the receiving hole (40) of the striker (4), the assist body (43) contacts the striker (4) and the door panel (12) can be opened to assist the latch lever (30). door lock according to claim 1, wherein interlocking timing with the lever (45) is it is configured. The latch lever (30) includes a first operation arm (35) for retracting the latch (9) and a second operation arm (36) for rotating the assist lever (45).
The assist lever (45) has a first operation piece (52) for advancing the assist body (43) and a second operation piece (53) that is rotated in the reverse direction by the second operation arm (36). Has
The latch lever (30) and the assist lever (45) are arranged on one side of the latch (9) in a state of being adjacent to each other,
The first operating arm (35) of the latch lever (30) and the first operating piece (52) of the assist lever (45) are accommodated in an operating recess (23) formed by cutting out toward the guide groove (21). has been passive surface (27), and door lock according to claim 1, wherein that Sessu passive surface of the assist member (439 (49) of each latch (9). The latch lever (30) is pivotally biased toward the standby posture by the third spring (31), and can self-return to the standby position by releasing the operating force of the operating tool (10).
The assist lever (45) includes a standby position where the first operating piece (52) is in contact with the retracted assist body (43), an operating position where the assist body (43) is operated to protrude out of the case (7), When the latch lever (309 self-returns to the standby position, it can be pivotally displaced to the retreat position where the second operation arm (36) retreats and swings out of the return stroke beyond the standby position,
The assist lever (45) is a fourth spring (46) having a smaller spring force than the second spring (44), and is urged to return from the retracted position to the standby position.
In a state where the assist lever (45) is positioned at the operating position, the second operating arm (36) gets over the second operating piece (53) and rotates to the limit rotation position, whereby the assist lever (45) and The assist body (43) can return to the standby position,
When the latch lever (30) returns to the standby position, the second operating arm (36) rotates back while rotating the second operating piece (53) from the standby position to the retracted position. arm (36) and the engagement between the second operating piece (53) is released, door lock according to claim 1, wherein the assist lever (45) can be self-reset to the standby position from the retracted position.

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