CN220395424U - Locking mechanism of side-hung door lock and fork type side-hung door lock with locking function - Google Patents

Abstract

The utility model discloses a locking mechanism of a flat-open door lock and a shifting fork type flat-open door lock with a locking function, wherein the locking mechanism comprises a knob, a locking inserting piece, a knob gear, a knob fastening screw and a locking rack seat, the knob gear can rotate along with the knob so as to drive the locking rack seat and the locking inserting piece to reciprocate, and the shifting fork type flat-open door lock with the locking function comprises a lock shell, a handle, a bottom plate, a handle gear, a knob, the locking inserting piece, the knob gear, the knob fastening screw and the locking rack seat. The locking mechanism has a simple structure and reasonable design, adopts a plug-in type locking structure, and can limit the rotation of the handle gear and the handle by inserting the locking plug-in sheet into the locking slot of the handle gear by rotating the knob, so that the flat-open door lock realizes the locking function.

Description

Locking mechanism of side-hung door lock and fork type side-hung door lock with locking function

Technical Field

The utility model relates to the technical field of door locks, in particular to a locking mechanism of a vertical hinged door lock and a shifting fork type vertical hinged door lock with a locking function.

Background

The traditional vertical hinged door lock generally comprises an inner door lock and an outer door lock, wherein the door lock is provided with a vertical hinged door lock panel, a handle, a linkage 8 x 8 square shaft, an M5 pair-through fastening screw x 2, a high-value lock cylinder, a lock body and a lock body buckle plate, the manufacturing cost of the whole vertical hinged door lock is high, and the whole vertical hinged door lock can be installed and used only by an aluminum product specially used for manufacturing the vertical hinged door so as to conveniently install a relatively wide lock body, and the requirement on a profile for product installation adaptation is high.

Along with the innovation of science and technology, a plurality of vertical hinged door lock products which do not need to be matched with lock cores, lock bodies and lock body buckle plates are also arranged on the market at present, but the vertical hinged door lock products are not provided with locking mechanisms and do not have locking functions.

Disclosure of Invention

The utility model aims to overcome the defects in the prior art and provide a locking mechanism of a flat-open door lock and a shifting fork type flat-open door lock with a locking function, which adopt a plug-in type locking structure, and can limit the rotation of a handle gear and a handle by inserting a locking plug into a locking slot of the handle gear by rotating a knob so as to realize the locking function of the flat-open door lock.

In order to achieve the above object, a first aspect of the present utility model provides a locking mechanism of a flat-open door lock, which comprises a knob, a locking insert, a knob gear, a knob fastening screw and a locking rack seat, wherein a butt positioning groove which is in butt joint with a driving end of the knob is arranged in the middle of the head end of the knob gear, the knob gear is in locking connection with the knob through the knob fastening screw, a knob gear part is arranged at the tail end of the knob gear, a locking rack part is arranged at one side of the front surface of the locking rack seat, the knob gear part of the knob gear is meshed with the locking rack part of the locking rack seat, the locking insert is installed at one end of the locking rack seat, and the knob gear can rotate along with the knob, so that the locking rack seat and the locking insert are driven to reciprocate.

Preferably, in the technical scheme of the locking mechanism, one end of the locking rack seat is provided with a positioning column, the tail end of the locking inserting piece is provided with a positioning column hole, and the positioning column is installed in the positioning column hole of the locking inserting piece.

Preferably, in the technical scheme of the locking mechanism, the locking mechanism further comprises a second steel ball spring mounting seat, second accommodating grooves are respectively formed in two sides of the second steel ball spring mounting seat, a second spring and second steel balls located at one end of the second spring are respectively arranged in the two second accommodating grooves, a plurality of second steel ball positioning grooves which are distributed in a central symmetry mode are formed in the outer wall of the knob gear, and the second steel balls are clamped into the corresponding second steel ball positioning grooves of the knob gear.

The utility model provides a shifting fork type vertical hinged door lock with a locking function, which comprises a lock shell, a handle, a bottom plate, a handle gear, a knob, a locking inserting piece, a knob gear, a knob fastening screw and a locking rack seat, wherein the bottom plate is arranged at the back of the lock shell, the head end of the handle gear passes through a handle installation through hole formed in the lock shell to realize positioning butt joint with the butt joint end of the handle, a butt joint positioning groove which is in butt joint with the driving end of the knob is formed in the middle part of the head end of the knob gear, the driving end of the knob passes through the knob installation through hole on the lock shell and is in locking connection with the knob gear through the knob fastening screw, the tail end of the knob gear is provided with a knob gear part, one side of the front face of the locking rack seat is provided with the locking rack part, the locking inserting piece is arranged at one end of the locking rack seat, and the knob gear can rotate along with the knob, so that the locking rack seat and the locking rack seat can be driven to reciprocate, and the head end of the knob gear can be inserted into a handle slot formed in the outer wall of the handle gear to limit the rotation of the knob gear.

Preferably, in the technical scheme of the flat-open door lock, one end of the locking rack seat is provided with a positioning column, the tail end of the locking inserting sheet is provided with a positioning column hole, and the positioning column is installed in the positioning column hole of the locking inserting sheet.

Preferably, in the technical scheme of the flat-open door lock, a second steel ball spring mounting seat is arranged in the lock shell, second accommodating grooves are respectively formed in two sides of the second steel ball spring mounting seat, a second spring and second steel balls positioned at one end of the second spring are respectively arranged in the two second accommodating grooves, a plurality of second steel ball positioning grooves which are distributed in a central symmetry mode are formed in the outer wall of the knob gear, the second steel balls are clamped into corresponding second steel ball positioning grooves of the knob gear, and the driving end of the knob sequentially penetrates through a knob mounting through hole of the lock shell, a central hole of the second steel ball spring mounting seat and a butt joint positioning groove of the knob gear to achieve positioning butt joint.

As the preference, in the technical scheme of flat-open door lock, still include transmission shifting fork spare and linkage square shaft, transmission shifting fork spare is located the inside of lock shell, handle gear's afterbody end is equipped with handle gear portion, offer the square shaft that supplies the linkage square shaft to pass on the transmission shifting fork spare and keep away the position hole, front one side of transmission shifting fork spare is equipped with shifting fork rack portion, the back of transmission shifting fork spare is equipped with the U type of stretching out the bottom plate back and pulls out the fork head, handle gear's handle gear portion meshes with the shifting fork rack portion of transmission shifting fork spare, handle gear can drive transmission shifting fork spare and do reciprocating motion along the length direction of lock shell when rotating, the one end of linkage square shaft is connected with handle gear's afterbody end, the square shaft through-hole that sets up on the bottom plate is passed to the other end of linkage square shaft stretches out the back of bottom plate.

Preferably, in the technical scheme of the flat-open door lock, the U-shaped shifting fork head is positioned at the lower end position of one side of the back of the transmission shifting fork piece.

As an optimization, in the technical scheme of the flat-open door lock, a first steel ball spring mounting seat is arranged in the lock shell, first accommodating grooves are respectively formed in two sides of the first steel ball spring mounting seat, a first spring and first steel balls positioned at one end of the first spring are respectively arranged in the two first accommodating grooves, a plurality of first steel ball positioning grooves which are distributed in a central symmetry mode are formed in the outer wall of the handle gear, the first steel balls are clamped into corresponding first steel ball positioning grooves of the handle gear, and the head end of the handle gear sequentially penetrates through a central hole of the first steel ball spring mounting seat and a handle mounting through hole of the lock shell to be in positioning butt joint with the butt joint end of the handle;

preferably, in the technical scheme of the flat-open door lock, the front cover of the first steel ball spring mounting seat is provided with an anti-falling gasket, and the anti-falling gasket seals the first accommodating grooves on two sides of the first steel ball spring mounting seat so as to prevent the first spring and the first steel ball from falling off.

Preferably, in the technical scheme of the flat-open door lock, the handle gear is in locking connection with the handle through a handle fastening screw, a knob gasket is arranged between the knob and the lock shell, and a handle gasket is arranged between the lock shell and the handle.

Compared with the prior art, the utility model has the beneficial effects that:

1. the locking mechanism has a simple structure and reasonable design, adopts a plug-in type locking structure, and can limit the rotation of the handle gear and the handle by inserting the locking plug-in sheet into the locking slot of the handle gear by rotating the knob, so that the flat-open door lock realizes the locking function.

2. The handle of the vertical hinged door lock can drive the transmission shifting fork to move through the handle gear, the operation is stable and reliable, the vertical hinged door lock is a vertical hinged door lock product which is relatively low in cost and does not need to be matched with a lock cylinder, a lock body and a lock body buckle plate, the use requirement of a conventional vertical hinged door profile is met, a door and window manufacturing enterprise can also use the conventional vertical hinged door profile to be matched with the product for manufacturing the vertical hinged door, and compared with the special vertical hinged door profile, the material cost of the vertical hinged door profile is lower, so that the manufacturing cost of the vertical hinged door can be greatly reduced.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural view of a locking mechanism according to an embodiment of the present utility model;

FIG. 2 is an exploded view of a locking mechanism provided by an embodiment of the present utility model;

FIG. 3 is a schematic view of a knob gear according to an embodiment of the present utility model;

FIG. 4 is an exploded view of a locking tab and locking rack mount provided by an embodiment of the present utility model;

fig. 5 is a schematic structural diagram of a fork type flat-open door lock with a locking function according to an embodiment of the present utility model;

fig. 6 is an exploded view of a fork-type flat-open door lock provided by an embodiment of the present utility model;

fig. 7 is a schematic structural diagram of a fork-pulling type vertical hinged door lock according to an embodiment of the present utility model after a lock shell is removed;

fig. 8 is a schematic structural diagram of a shifting fork type vertical hinged door with a locking function provided by the embodiment of the utility model after a bottom plate is locked;

FIG. 9 is a schematic view of a handle gear according to an embodiment of the present utility model;

FIG. 10 is a schematic view of a driving fork assembly according to an embodiment of the present utility model;

fig. 11 is a schematic diagram of a structure in which inner and outer fork-type vertical hinged doors are locked in cooperation with each other according to an embodiment of the present utility model.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Example 1

Referring to fig. 1 to 4, a locking mechanism of a flat-open door lock is provided according to an embodiment of the present utility model, which includes a knob 14, a locking tab 15, a knob gear 17, a knob fastening screw 18, a locking rack seat 19, and other components, and the following detailed description of the components of the present embodiment is given with reference to the accompanying drawings.

As shown in fig. 3 and 4, a butt positioning groove 171 (square groove) which is butted with the driving end (square shape) of the knob 14 is provided in the middle of the head end of the knob gear 17, a knob gear portion 172 is provided at the tail end of the knob gear 17, a locking rack portion 191 is provided on the front side of the locking rack seat 19, and the knob gear portion 172 of the knob gear 17 is engaged with the locking rack portion 191 of the locking rack seat 19.

In this embodiment, the knob gear 17 may be lockingly connected to the knob 14 by a knob tightening screw 18.

Specifically, as shown in fig. 4, one end of the locking rack seat 19 may be provided with a positioning post 192, and the tail end of the locking tab 15 may be provided with a positioning post hole 151, and the positioning post 192 is installed in the positioning post hole 151 of the locking tab 15, so that the locking tab 15 can be quickly installed at one end of the locking rack seat 19.

As shown in fig. 2, the locking mechanism is further provided with a second steel ball spring mounting seat 20, two sides of the second steel ball spring mounting seat 20 are respectively provided with a second accommodating groove 201, the inside of the two second accommodating grooves 201 is respectively provided with a second spring 21 and a second steel ball 22 positioned at one end of the second spring 21, correspondingly, the outer wall of the knob gear 17 can be provided with a plurality of second steel ball positioning grooves 173 which are distributed in a central symmetry manner, and under the elastic action of the second spring 21, the second steel balls 22 can be clamped into the corresponding second steel ball positioning grooves 173 of the knob gear 17, so that the knob gear 17 can be positioned.

In operation, the knob gear 17 can rotate along with the knob 14, thereby driving the locking rack seat 19 and the locking tab 15 to reciprocate.

Example two

Referring to fig. 5 to 10, a second embodiment of the present utility model provides a fork-type vertical hinged door lock with a locking function, which includes a lock housing 1, a handle 2, a bottom plate 3, a handle gear 4, a handle fastening screw 5, a driving fork 6, a linkage square shaft 7, and a locking mechanism according to the first embodiment, and each component of the embodiment is described in detail below with reference to the accompanying drawings.

As shown in fig. 5 and 6, the lock case 1 may be provided in a rectangular parallelepiped structure, and the bottom plate 3 may be fixedly mounted on the back of the lock case 1 by screws.

As shown in fig. 6, the handle gear 4 and the transmission shifting fork 6 are respectively located in the lock case 1, the head end (square) of the handle gear 4 can pass through a handle installation through hole 11 formed in the lock case 1 to be in positioning butt joint with the butt joint end (provided with a square groove) of the handle 2, and the handle gear 4 can be in locking connection with the handle through a handle fastening screw 5.

As shown in fig. 6, 9 and 10, the tail end of the handle gear 4 is provided with a handle gear portion 41, one side of the front face of the transmission shifting fork piece 6 is provided with a shifting fork rack portion 62, the handle gear portion 41 of the handle gear 4 can be meshed with the shifting fork rack portion 62 of the transmission shifting fork piece 6, the back of the transmission shifting fork piece 6 is provided with a U-shaped shifting fork head 63 extending out of the back of the bottom plate 3, wherein the U-shaped shifting fork head 63 can be matched with a transmission aluminum strip in a conventional side-hung door or side-hung window, and a fork opening of the U-shaped shifting fork head 63 can be used for inserting a T-shaped nail of the transmission aluminum strip.

Preferably, the U-shaped shifting fork head 63 can be positioned at the lower end of one side of the back of the transmission shifting fork 6, and collision between the U-shaped shifting fork head 63 and the linkage square shaft 7 can be avoided.

As shown in fig. 5, 8 and 10, the transmission shifting fork 6 may be provided with a square shaft avoidance hole 61 through which the linkage square shaft 7 passes, one end of the linkage square shaft 7 is connected with the end of the tail end of the handle gear 4, and the other end of the linkage square shaft 7 may extend to the back of the bottom plate 3 through a square shaft through hole 31 provided on the bottom plate 3.

As shown in fig. 6 to 8, the lock case 1 may further be provided with a first steel ball spring mounting seat 8 inside, two sides of the first steel ball spring mounting seat 8 are respectively provided with a first accommodating groove 81, two first accommodating grooves 81 are respectively provided with a first spring 9 and a first steel ball 10 located at one end of the first spring 9 inside, and correspondingly, the outer wall of the handle gear 4 may be provided with a plurality of first steel ball positioning grooves 42 distributed in a central symmetry manner, and under the elastic action of the first spring 9, the first steel balls 10 can be clamped into the corresponding first steel ball positioning grooves 42 of the handle gear 4, so as to perform a positioning function on the handle gear 4.

As shown in fig. 6, the front surface of the first steel ball spring mounting seat 8 may be further covered with an anti-falling gasket 12, where the anti-falling gasket 12 can close the first accommodating grooves 81 on two sides of the first steel ball spring mounting seat 8, so as to prevent the first spring 9 and the first steel ball 10 from falling off.

Preferably, in order to facilitate the rotation of the handle 2, a handle gasket 13 may be further added between the lock case 1 and the handle 2.

When the lock is specifically installed, the head end of the handle gear 4 can sequentially pass through the central hole of the first steel ball spring installation seat 8, the central hole of the anti-falling gasket 12, the handle installation through hole 11 of the lock shell 1 and the butt joint end of the handle washer 13 and the handle 2 to realize positioning butt joint.

When the handle 2 rotates, the handle gear 4 also rotates, and the handle gear part 41 of the handle gear 4 can be in transmission fit with the shifting fork rack part 62 of the transmission shifting fork 6, so that the transmission shifting fork 6 is driven to reciprocate along the length direction of the lock shell 1, and at the moment, the U-shaped shifting fork head 63 can drive the transmission aluminum strip to move.

As shown in fig. 1 to 4, 6 and 7, the locking mechanism may include a knob 14, a locking tab 15, a knob gear 17, a knob fastening screw 18 and a locking rack seat 19, wherein a docking positioning groove 171 (square groove) for docking with a driving end (square shape) of the knob 14 is provided in the middle of a head end of the knob gear 17, a knob gear portion 172 is provided at a tail end of the knob gear 17, a locking rack portion 191 is provided on one side of a front surface of the locking rack seat 19, and the knob gear portion 172 of the knob gear 17 is engaged with the locking rack portion 191 of the locking rack seat 19.

Specifically, as shown in fig. 4, one end of the locking rack seat 19 may be provided with a positioning post 192, and the tail end of the locking tab 15 may be provided with a positioning post hole 151, and the positioning post 192 is installed in the positioning post hole 151 of the locking tab 15, so that the locking tab 15 can be quickly installed at one end of the locking rack seat 19.

As shown in fig. 2 and 6, the locking mechanism further includes a second steel ball spring mounting seat 20, two sides of the second steel ball spring mounting seat 20 are respectively provided with a second accommodating groove 201, two second accommodating grooves 201 are respectively provided with a second spring 21 and a second steel ball 22 located at one end of the second spring 21, correspondingly, the outer wall of the knob gear 17 may be provided with a plurality of second steel ball positioning grooves 173 which are distributed in a central symmetry manner, and under the elastic action of the second spring 21, the second steel balls 22 can be clamped into the corresponding second steel ball positioning grooves 173 of the knob gear 17, so as to play a role in positioning the knob gear 17.

As shown in fig. 6, a knob washer 23 may also be provided between the knob 14 and the lock housing 1, which facilitates the rotational movement of the knob 14.

In the specific installation, the driving end of the knob 14 can sequentially pass through the knob washer 23, the knob installation through hole 16 of the lock shell 1, and the central hole of the spring installation seat 20 of the second steel ball 22 to be in positioning and butt joint with the butt joint positioning groove 171 of the knob gear 17.

When the locking is needed, the knob 14 can be rotated, and the knob gear 17 can rotate along with the knob 14, so that the locking rack seat 19 is driven to move towards the direction close to the handle gear 4, and the head end of the locking inserting piece 15 is inserted into the locking slot 43 of the handle gear 4 to limit the rotation of the handle gear and the handle, so that the locking function is realized.

In specific implementation, the fork type flat-open door lock with the locking function of the second embodiment can be used as an inner door lock. As shown in fig. 11, the fork-type flat-open door lock with the locking function can be matched with an outer flat-open door lock, and the inner flat-open door lock can also comprise a lock shell 1, a handle 2, a bottom plate 3, a handle gear 4, a handle fastening screw 5 and other components, wherein the outer flat-open door lock and the fork-type flat-open door lock of the embodiment share a linkage square shaft 7.

In summary, the locking mechanism of the utility model has simple structure and reasonable design, adopts the inserting sheet type locking structure, and can limit the rotation of the handle gear and the handle by inserting the locking inserting sheet into the locking slot of the handle gear by rotating the knob, thereby realizing the locking function of the flat-open door lock.

In addition, the shifting fork type flat-open door lock is a flat-open door lock product which is relatively low in manufacturing cost and does not need to be matched with a lock cylinder, a lock body and a lock body buckle plate, the use requirement of a conventional flat-open door profile is met, a door and window manufacturing enterprise can also use the conventional flat-open window profile to be matched with the product to manufacture the flat-open door, and the flat-open window profile is lower in material cost compared with the special flat-open door profile, so that the manufacturing cost of the flat-open door can be greatly reduced.

The above examples are preferred embodiments of the present utility model, but the embodiments of the present utility model are not limited to the above examples, and any other changes, modifications, substitutions, combinations, and simplifications that do not depart from the spirit and principle of the present utility model should be made in the equivalent manner, and the embodiments are included in the protection scope of the present utility model.

Claims (10)

1. A locking mechanism of a flat-open door lock, which is characterized in that: including knob (14), locking inserted sheet (15), knob gear (17), knob fastening screw (18) and locking rack seat (19), the head end middle part of knob gear (17) is equipped with butt joint constant head tank (171) that dock with the drive end of knob (14), knob gear (17) are connected with knob (14) lock solid through knob fastening screw (18), the afterbody end of knob gear (17) is equipped with knob gear (172), positive one side of locking rack seat (19) is equipped with locking rack portion (191), the knob gear (172) of knob gear (17) meshes with locking rack portion (191) of locking rack seat (19), one end at locking rack seat (19) is installed in locking inserted sheet (15), knob gear (17) can follow knob (14) and rotate to drive locking rack seat (19) and locking inserted sheet (15) and do reciprocating motion.

2. The locking mechanism of a flat-open door lock according to claim 1, wherein: one end of the locking rack seat (19) is provided with a positioning column (192), the tail end of the locking inserting piece (15) is provided with a positioning column hole (151), and the positioning column (192) is arranged in the positioning column hole (151) of the locking inserting piece (15).

3. The locking mechanism of a flat-open door lock according to claim 1, wherein: the rotary knob gear is characterized by further comprising a second steel ball spring mounting seat (20), second accommodating grooves (201) are respectively formed in two sides of the second steel ball spring mounting seat (20), a second spring (21) and second steel balls (22) located at one end of the second spring (21) are respectively arranged in the two second accommodating grooves (201), a plurality of second steel ball positioning grooves (173) which are distributed in a central symmetry mode are formed in the outer wall of the rotary knob gear (17), and the second steel balls (22) are clamped into corresponding second steel ball positioning grooves (173) of the rotary knob gear (17).

4. The utility model provides a take fork formula flat-open lock of locking function which characterized in that: the lock comprises a lock shell (1), a handle (2), a bottom plate (3), a handle gear (4), a knob (14), a locking inserting piece (15), a knob gear (17), a knob fastening screw (18) and a locking rack seat (19), wherein the bottom plate (3) is arranged at the back of the lock shell (1), the head end of the handle gear (4) penetrates through a handle mounting through hole (11) formed in the lock shell (1) to realize positioning butt joint with the butt joint end of the handle (2), a butt joint positioning groove (171) which is in butt joint with the driving end of the knob (14) is formed in the middle of the head end of the knob gear (17), the driving end of the knob (14) penetrates through a knob mounting through hole (16) in the lock shell (1) and is in locking connection with the knob gear (17) through the knob fastening screw (18), the tail end of the knob gear (17) is provided with a knob gear portion (172), one side of the front of the locking rack seat (19) is provided with a locking inserting piece (191), the knob gear portion (172) of the knob gear (17) is meshed with the locking rack seat (19) in a meshed mode with the locking rack portion (191) of the locking rack seat (19), and the knob gear (14) can rotate, thereby driving the locking rack seat (19) and the locking inserting piece (15) to reciprocate, and the head end of the locking inserting piece (15) can be inserted into a locking slot (43) formed on the outer wall of the handle gear (4) so as to limit the rotation of the handle gear (4).

5. The fork type flat-open door lock with locking function according to claim 4, wherein: one end of the locking rack seat (19) is provided with a positioning column (192), the tail end of the locking inserting piece (15) is provided with a positioning column hole (151), and the positioning column (192) is arranged in the positioning column hole (151) of the locking inserting piece (15).

6. The fork type flat-open door lock with locking function according to claim 4, wherein: the inside of lock shell (1) is equipped with second steel ball spring mount pad (20), the both sides of second steel ball spring mount pad (20) are equipped with second accommodation groove (201) respectively, and the inside of two second accommodation grooves (201) is equipped with second spring (21) respectively and is located second steel ball (22) of second spring (21) one end, the outer wall of knob gear (17) is equipped with a plurality of second steel ball constant head tank (173) that are central symmetry and distribute, second steel ball (22) card is gone into in corresponding second steel ball constant head tank (173) of knob gear (17), the drive end of knob (14) passes knob installation through-hole (16) of lock shell (1), the centre bore of second steel ball spring mount pad (20) realizes the location butt joint with butt joint constant head tank (171) of knob gear (17) in proper order.

7. The fork type flat-open door lock with locking function according to claim 4, wherein: still including transmission shifting fork piece (6) and linkage square shaft (7), transmission shifting fork piece (6) are located the inside of lock shell (1), the afterbody end of handle gear (4) is equipped with handle gear portion (41), offer on transmission shifting fork piece (6) and supply square shaft to keep away position hole (61) that linkage square shaft (7) passed, front one side of transmission shifting fork piece (6) is equipped with shifting fork rack portion (62), the back of transmission shifting fork piece (6) is equipped with U type shifting fork head (63) that stretches out bottom plate (3) back, handle gear portion (41) of handle gear (4) meshes with shifting fork rack portion (62) of transmission shifting fork piece (6), handle gear (4) can drive transmission shifting fork piece (6) and do reciprocating motion along the length direction of lock shell (1) when rotating, the one end of linkage square shaft (7) is connected with the afterbody end tip of handle gear (4), the other end of square shaft (7) is equipped with and stretches out bottom plate (31) on bottom plate (3) of stretching out bottom plate (31).

8. The locking function of the fork-type flat-open door lock according to claim 7, wherein: the U-shaped shifting fork head (63) is positioned at the lower end of one side of the back of the transmission shifting fork piece (6).

9. The fork type flat-open door lock with locking function according to claim 4, wherein: the novel lock is characterized in that a first steel ball spring mounting seat (8) is arranged in the lock shell (1), first accommodating grooves (81) are respectively formed in two sides of the first steel ball spring mounting seat (8), a first spring (9) and first steel balls (10) positioned at one end of the first spring (9) are respectively arranged in the two first accommodating grooves (81), a plurality of first steel ball positioning grooves (42) which are distributed in a central symmetry mode are formed in the outer wall of the handle gear (4), the first steel balls (10) are clamped into the corresponding first steel ball positioning grooves (42) of the handle gear (4), and the head end of the handle gear (4) sequentially penetrates through a central hole of the first steel ball spring mounting seat (8) and the butt joint end of a handle mounting through hole (11) of the lock shell (1) and the handle (2) to realize positioning butt joint;

the front cover of the first steel ball spring mounting seat (8) is provided with an anti-falling gasket (12), and the anti-falling gasket (12) seals the first accommodating grooves (81) on two sides of the first steel ball spring mounting seat (8) so as to prevent the first spring (9) and the first steel ball (10) from falling off.

10. The fork type flat-open door lock with locking function according to claim 4, wherein: the handle gear (4) is fixedly connected with the handle through a handle fastening screw (5), a knob gasket (23) is arranged between the knob (14) and the lock shell (1), and a handle gasket (13) is arranged between the lock shell (1) and the handle (2).