KR100303367B1 - Door ratch assembly for automobile - Google Patents

Abstract

PURPOSE: A door latch assembly for vehicle is provided to reduce the number of components and improve productivity by combining various levers with an upper shaft and a lower shaft of a door latch body. CONSTITUTION: A guide hole(15) is formed on a center portion of a vertical plate(13). An upper shaft(11) and a lower shaft(12) are formed in an upper portion and a lower portion of a door latch body(10). A latch claw(17) is installed to the upper shaft(11) of the door latch body(10). A pole(18) is installed to the upper shaft(12) of the door latch body(10). A lock connection lever(22) is installed to the upper shaft(11) of the door latch body(10) in order to maintain a locking state of a door. A pole lever(19) is installed to the lower shaft(12) of the door latch body(10) in order to operate the pole(18). An inner release lever(26) is installed on an upper portion of the pole lever(19). An outer handle lever(29) is installed on an upper portion of the inner release lever(26). A lock link(34) is used for connecting the lock connection lever(22) with the pole lever(19). A connection plate(36) is installed on upper portions of the upper shaft(11) and the lower shaft(12). An inner handle lever(37) is connected with one side of the connection plate(36). A lock lever(16) is installed to the vertical plate(13).

Description

Door latch assembly for automobile

The present invention relates to a door latch for a vehicle that can be locked and opened according to the opening and closing operation of the car door, more specifically, the various levers for the locking and opening function of the door at the upper and lower parts of the door latch body It is connected to the upper and lower shafts that are built up to reduce the number of parts, as well as to reduce the number of assembly due to their assembly to the automotive door latch assembly that can improve work productivity and quality It is about.

In general, the door latch of a sliding door type vehicle is mainly operated when the door is opened and closed together with a door lock striker which is embedded in the central thickness portion of the outermost circumference of the door and fixed to the vehicle body at the corresponding position.

A conventional door latch assembly used for this purpose is connected to the outer handle outside the door, as shown in Figure 1a to 1b, the outer handle lever 117 for unlocking the door latch when the handle is in operation And the control lever 113 installed through the outer handle lever 117 and the upper fixing shaft 111 and the inner handle inside the door, and the inner side for releasing the locking of the door latch during operation of the handle. It is installed through the handle lever 115, the inner handle lever 115 and the lower fixed shaft 112, and moved from the outside by the operation of the key or the actuator operation, the lock lever having a function of opening and opening of the door ( 114 and a claw 120 for holding the door in a closed state when the door is closed, and a pawl 119 for restraining the claw 120, wherein the inner handle lever 115 and the outer handle lever ( 117) Moving the pawl 119, which pass on the enclosure 120 by the fixing by the striker fixed to the vehicle body to release the engagement of the claw 120, which to be able to open the door,

As shown in FIG. 1A, in normal use without moving the lock lever 114 of the door latch 110 (ie, the locked state of the door is released), the handle is first pulled out to open the door. A rod mounted on the rod pushes the outer handle lever 117 of the door latch, and an end of the outer handle lever 117 pushes the upper end of the pawl 119 to open the door.

In addition, when the inner handle is operated to open the door, the operating force is transmitted to the rod mounted on the inner handle and pulls the inner handle lever 115 linked to the rod. The inner lever lever 115 rotates about the rotation center 116 which is the rotation center by the above action, and the control lever 113 which is pivotally fixed to the upper fixing shaft 111 of the upper end of the door latch 110 is pushed. As a result, the end of the outer handle lever 117 connected to one side of the control lever 113 by the connecting shaft 118 pushes the upper end of the pole 119 to open the door.

In addition, as shown in Figure 1b, when the lock knob (not shown) is located close to the door glass for the door lock is pressed down the operating force is transmitted to the rod to push the lock lever 114 connected to it do. Subsequently, the lock lever 114 rotates about the lower fixed shaft 112 of the lower end of the door latch 110, and thus the guide hole 117 ′ formed in the outer handle lever 117 is the lock lever ( The outer handle lever 117 rotates to the outside of the door latch 110 while moving along the guide rod 114 ′ formed in the 114, and the outer handle lever 117 which pushes the upper end of the pole 119. The end of the is also moved to the outside is out of the rotation radius of the pole 119. Therefore, the pawl 119 cannot be pushed through the end of the outer handle lever 117 during the operation of the outer handle or the inner handle so that the door cannot be opened and the door is locked.

However, according to the conventional door latch having such a structure, the inner handle lever 115 and the center of rotation for the rotation of the outer handle lever 117 are divided into a pivot shaft 116 and a connecting shaft 118 pivotally fixed. The control lever 113, which is interlocked according to the operation of the inner and outer handle levers 115 and 117, also rotates around the upper fixed shaft 111, and is connected to the control lever 113 through a link. The lock lever 114 having the door opening and the opening prevention function is also rotated about the lower fixed shaft 112, and is rotated through different centers between the parts, and thus requires many links for connecting them. Therefore, there was a fear of malfunction, and accordingly, when assembling each part, a lot of assembly labor and parts were required, and a problem that the operation was not performed smoothly occurred.

In addition, the functional part for the door lock is assembled to the upper end with the levers, the function of opening the door, the function for operating the lock lever 114 and the pawl 119 is assembled to the lower end, It also has a lot of assembly work, a lot of parts, and has a lever with many links, which is a malfunction or a structure that is not smooth.

In addition, in order to unlock the door by the passenger inside the vehicle while the door is locked, pull the lock knob upwards and pull the lock lever 114 of the door latch 110 connected through the knob and the rod to handle the outer handle. After the lever 117 is positioned up to the upper end of the pole 119, which is a normal operating position, inconvenience occurs that the inner handle needs to be operated.

Therefore, in order to solve the above-mentioned problems, the various levers for the locking and opening functions of the door are coupled to the upper and lower shafts arranged on the upper and lower parts of the door latch body, thereby operating the number of parts. It is possible to reduce, as well as to reduce the number of assembly due to their assembly is to provide an automobile door latch assembly that can improve work productivity and quality.

Figure 1a, 1b is a front view showing a conventional door latch for a vehicle.

Figure 2 is an exploded perspective view showing a door latch according to the present invention.

Figure 3 is a perspective view showing a door latch according to the present invention.

4A to 4B are cross-sectional views illustrating the locked state of the door latch and the unlocked state when the door is closed according to the present invention;

Figure 4a is an operating state diagram showing the maintenance of the locked state of the door latch when the door is closed,

Figure 4b is a side operation showing the unlocked state of the door latch when the door is closed.

Figure 4c is an operating state showing the unlocked state of the door latch when the door is closed.

5 is an operating state showing the state of opening the door through the inner and outer handle lever in the locked state of the door latch according to the present invention.

Explanation of symbols on the main parts of the drawings

10; Door latch body 11; Upper shaft

12; Lower axis 13; Vertical

14; Coupling hole 15; Receptionist

16; Lock lever 17; Latch claw

18; Paul 19; Pole lever

20; Locking jaw 21; Jam

22; Lock connection lever 23; Guide rod

24; Motor connecting rod 25; Joiner

26; Inner release lever 27; Guide ball

28; Step 30; Outer handle lever

31; Connecting bar hanger groove 32; spring

33; Closing cap 34; Rock link

35a, 35b; Coupling projection 36; Connecting plate

37; Inner Handle Lever

The present invention for achieving the above object,

A door latch body having a vertical plate having a guide hole at its center, standing up at one side thereof, and having upper and lower shafts penetrated therethrough; A latch claw which is installed on an upper shaft protruding from the rear surface of the door latch body and contacts a striker installed in the vehicle body when the door is closed; A pawl installed on the lower shaft of the door latch body to restrain the latch claw when the door is closed to maintain the locking operation; A lock connection lever installed on an upper axle on the front of the door latch body to prevent the door latch from being opened when the lock lever is operated in the vehicle to maintain the locking of the door; A pole lever installed on a lower shaft of the front door latch body to operate the pole; An inner release lever installed above the pole lever; An outer handle lever installed at an upper portion of the inner release lever, the outer handle lever being a link for pushing the pawl to unlock the door when the outer handle of the door is operated in the door lock state; A lock link connecting the lock connection lever and the pole lever to operate the pole lever when the lock connection lever is operated; A connection plate arranged on an upper portion of a component arranged on an upper shaft and a lower shaft to prevent separation of the components; An inner handle lever pivotally coupled to one side of the connecting plate, the inner handle lever being a link for pushing the pawl to release the locking of the door from the inside; The lock is installed on a vertical plate on one side of the door latch and connected to an electric actuator of a key set and a lock connection lever to operate a lock connection lever when the car door lock key is operated from the outside.

That is, the various levers for the locking and opening of the door is coupled to the upper and lower shafts arranged on the upper and lower parts of the door latch body, so that the number of parts can be reduced, as well as the assembly thereof. The assembly labor can be reduced. Therefore, work productivity and quality can be improved.

Such a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Figure 2 is an exploded perspective view showing a door latch according to the present invention,

3 is a perspective view showing a door latch according to the present invention,

4A to 4C are cross-sectional views illustrating the locked state of the door latch and the unlocked state when the door is closed according to the present invention;

Figure 4a is an operating state diagram showing the maintenance of the locked state of the door latch when the door is closed,

Figure 4b is a side operation showing the unlocked state of the door latch when the door is closed.

Figure 4c is a planar operation showing the unlocked state of the door latch when the door is closed,

5 is an operating state diagram showing a state of opening the door through the inner and outer handle lever in the locked state of the door latch according to the present invention.

As shown in FIG. 2, the door latch for an automobile according to the present invention has an upper shaft 11 and a lower shaft 12 penetrated through the upper and lower centers thereof, and a coupling hole 14 and a guide hole 15 in the center. The lock plate positioned close to the vehicle door glass window in the coupling hole 14 of the vertical plate 13 formed on one side is provided with a door latch body 10 standing up on one side of the vertical plate 13 having a). (Not shown) is coupled to rotate the lock lever 16, and the upper shaft 11 protruding on the back of the door latch body 10 in contact with the striker installed in the vehicle body when closing the striker A latch claw 17 is formed to serve as a locking mechanism and a cushion hole 17 'is formed at an end thereof.

In addition, the lower shaft 12 protruding from the rear surface of the door latch body 10 has a pawl 18 for restraining the latch claw 17 to be closed when the door is closed.

Subsequently, when the lock lever 16 is operated in the vehicle, the upper shaft 11 protruding from the front of the door latch body 10 may be prevented from opening the door latch to maintain the locked state of the door. The guide rod 23 is inserted into the guide hole 15 formed in the vertical plate 13 of the door latch body 10, the motor connecting rod 24 is connected to the motor for driving the door latch on the other side This is formed, and the lock connection lever 22, the coupling hole 25 is formed at the center of the upper shaft 11 through the shaft hole 22 '.

In addition, on the lower shaft 12 protruding from the front of the door latch body 10, a locking jaw 20 is formed at one side, and the pawl lever 19 at which the locking piece 21 is protruded is formed at the center of the lower side. Snow is formed through the shaft hole (19 '), which is formed on the other side of the rear lower shaft 12 of the door latch body 10 through the locking piece 21 is formed through the door latch body 10 Install to engage with pawl 18.

When the pole lever 19 is coupled to the lower shaft 12 by the above action, the guide hole 27 is formed on one side and the inner release lever 26 on which the stepped portion 28 is erected is formed on the other end. 26 ') is coupled to the lower shaft 12 at the top of the pole lever 19.

Subsequently, in the upper part of the inner release lever 26 coupled to the lower shaft 12, when the outer handle of the door is operated in the door lock state, the pressing part is pushed on one side to push the pawl 18 to open the door from the outside. 30 is formed and the outer handle lever 29 is formed on the other side connecting bar hanger groove 31 is coupled through the shaft hole (29 '), so that the outer handle lever 29 can be rotated upwards. Install the spring (32) to finish with a closing cap (33).

By the above operation, the lock connection lever 22 is installed on the upper shaft 11 of the door latch body 10, and the pawl lever 19, the inner release lever 26, and the outer handle lever 29 are provided on the lower shaft 12. ) Is sequentially coupled, the lock connection through the engaging projection (35a, 35b) formed on both sides of the lock link 34 for operating the pole lever 19 when the lock connection lever 22 is operated. The lock connection lever 22 and the pawl lever 19 are coupled to the coupling hole 25 of the lever 22 and the guide hole 27 of the inner release lever 26.

Subsequently, the connecting plate 36 is installed on the upper shaft 11 and the lower shaft 12 of the door latch body 10 to prevent the detachment of various components arranged on both shafts, On one side is configured to rotate the inner handle lever 37, which is a link for pushing the pawl 18 to open the door from the inside.

According to the door latch assembly for a vehicle according to the present invention having such a configuration,

When the door lock knob (not shown) is installed close to the window of the vehicle body to maintain the locked state of the door when the door is closed, the lock connection lever 22 connected through the knob and the rod as shown in Figure 4a Will operate downward. Accordingly, the lock link 34 coupled to the lock connection lever 22 and the guide hole 27 of the inner release lever 26 is simultaneously moved to the lower side through the engaging protrusions 35a and 35b formed on both rear surfaces thereof. As it is located in the lower end of the guide hole 27 of the pressing portion 30 and the inner release lever 26 of the outer handle lever 29 is released from the locking jaw 20 of the pole lever 19.

Accordingly, when the inner release lever 26 is operated by the outer handle lever 29, the engaging projection 35a of the lock link 34 is operated outside the engaging jaw 20 of the pawl lever 19 (ie, idling). Thus, the locked state of the door latch is maintained.

On the contrary, when the inner handle lever 37 is operated to unlock the door, as shown in FIG. 4B, the inner handle lever 37 arranged on one side of the connecting plate 36 is connected to the connecting plate 36. Rotating upward in the end is located at its end and pushes the lock lever 16 coupled to the coupling hole 14 of the vertical plate 13 so that the lock lever 16 is rotated to one side in the vertical plate 13, Subsequently, as shown in FIG. 4C, the lock connection lever 22 connected to the guide hole 15 of the vertical plate 13 through the guide rod 23 is moved to the normal position (ie, moved upward).

As described above, when the lock connection lever 22 is moved to the normal position, the guide hole 27 of the lock connection lever 22 and the inner release lever 26 through the engaging projections 35a and 35b formed on both rear surfaces thereof. The lock link 34 coupled to the lock lever 34 is moved to the top at the same time while being positioned at the upper end of the guide hole 27 of the pressing portion 30 of the outer handle lever 29 and the inner release lever 26. ) Is located at the locking jaw (21).

Accordingly, when the inner release lever 26 is operated by the inner handle lever 37, the engaging projection 35a of the lock link 34 is operated in the engaging jaw 20 of the pawl lever 19 and thus, the pawl. As the lever 19 rotates together, the pawl 18 coupled to the pawl lever 19 through the locking piece 21 rotates around the lower shaft 12 protruding from the back of the door latch body 10. By releasing the restraint on the 17, the door is unlocked when the outer or inner handle levers 29 and 37 are operated.

At this time, when the latching force 17 of the pawl 18 is released and the latching claw 17 is rotated from the upper shaft 11 of the door latch body 10, the latching claw 17 is in contact with the pawl 18. While being shocked, the cushion hole 17 'is formed in the contact portion of the latch claw 17 that is in contact with the pawl 18 to prevent this, thereby absorbing the impact through the latch claw 17 Shock can be attenuated.

In addition, if the door does not open when the inner handle is operated while the door is locked by the central locking device, when the inner door handle is pulled, the rod connected to the inner door handle pulls the inner handle lever 37, and the inner handle lever As the 37 is pulled, the lock lever 16 is pushed and the door can be unlocked as described above.

Meanwhile, when the inner door handle is pulled to open the door from the inside in the locked state of the door by the operation, as shown in FIG. 4B, the inner handle lever 37 connected to the inner door handle is connected to the connection plate. While rotating at 36, the step 28 of the inner release lever 26 is pushed so that the inner release lever 26 is rotated to one side on the lower shaft 12, and then the inner release is shown in FIG. 5. The engagement lever 35a of the lock link 34 coupled to the guide hole 27 of the lever 26 is caught by the locking jaw 20 of the pawl lever 19 coupled to the lower shaft 12, and the pawl lever 19 Rotated). Accordingly, the pawl 18 coupled to the pawl lever 19 and the engaging piece 20 is rotated at the rear surface of the door latch body 10, and at this time, through the shaft hole 29 ′ in the lower shaft 12. The outer handle lever 29 to be coupled is also rotated.

When the pawl 18 is rotated by the above operation, the door is opened by releasing the restraint of the latch claw 17 which maintains the closed state of the door by engaging the striker fixed to the vehicle body.

Further, when the outer door handle is pulled to open the door from the outside in the unlocked state of the door, as shown in FIG. 5, the outer door handle is connected to and installed through a rod (not shown). As the outer handle lever 29 coupled to the lower shaft 12 through the lower shaft 12 rotates about the lower shaft 12, the pressing portion 30 formed at one side thereof is a guide hole of the inner release lever 26. Pushing the engaging projection 35a of the lock link 34 coupled to (27) and, accordingly, the engaging projection 35a is caught by the locking jaw 20 of the pole lever 19 coupled to the lower shaft 12 The pawl lever 19 is rotated, and as the pawl lever 19 rotates, the pawl 18 coupled to the pawl lever 19 and the engaging piece 20 is rotated at the rear of the door latch body 10. The door can be opened.

In the present invention, since the outer handle lever 29, the inner release lever 26, and the pawl lever 19 are assembled to the lower shaft 12 of the door latch body 10, the assembly labor during assembly is reduced and the operation is performed. It is possible to solve the risk of failure due to the complicated link method.

As described above, the present invention is to allow the various levers for the locking and opening function of the door to be coupled to the upper and lower shafts arranged on the upper and lower parts of the door latch body, thereby reducing the number of parts, of course. In this way, the number of assembly operations due to the assembly thereof can be reduced, and work productivity and quality can be improved while eliminating the fear of failure.

Claims (2)

A door latch body 10 having a vertical plate 13 having a guide hole 15 at the center thereof standing up at one side thereof, and having an upper shaft 11 and a lower shaft 12 penetrated therein; A latch claw 17 installed on the upper shaft 11 protruding from the rear surface of the door latch body 10 to be in contact with the striker installed in the vehicle body when the door is closed; A pawl (18) installed on the lower shaft (12) of the door latch body (10) to restrain the latch claw (17) when the door is closed to maintain the locking operation; The lock connection lever 22 is installed on the upper shaft 11 on the front of the door latch body 10 to prevent the door latch from opening when the lock lever 16 is operated in the vehicle, thereby maintaining the locking of the door. Wow; A pole lever (19) installed on the lower shaft (12) in front of the door latch body (10) to operate the pole (18); An inner release lever 26 provided on an upper portion of the pawl lever 19; An outer handle lever 29 which is installed on an upper side of the inner release lever 26 and which links the pawl 18 to release the door when the outer handle of the door is operated in the door lock state; A lock link (34) for connecting the lock connection lever (22) and the pole lever (19) to operate the pole lever (19) when the lock connection lever (22) is operated; A connection plate 36 arranged on an upper portion of the components arranged on the upper shaft 11 and the lower shaft 12 to prevent the components from being separated; An inner handle lever 37 which is pivotally coupled to one side of the connecting plate 36 and which is a link for pushing the pawl 18 to release the locking of the door from the inside; Is installed on the vertical plate 13 on one side of the door latch body 10 is connected to the electric actuator and the lock connection lever 22 of the set to operate the car door lock key from the outside to operate the lock connection lever 22 Door latch assembly for a vehicle, characterized in that consisting of a lever (16). 2. The door latch assembly for an automobile according to claim 1, wherein a cushion hole (17 ') is formed in a portion in contact with the pawl (18) during the operation of the latch claw (17).