Double-stroke door and window turning hand lock with accurately-positioned handle

Abstract

A double-stroke door and window flip lock with a handle capable of being accurately positioned comprises a shell, a shifting fork and the handle. A handle accommodating cavity is formed in the shell; a positioning shaft sleeve is arranged in a rotating concave position of the handle containing cavity, two containing positioning grooves are formed in the peripheral face of the positioning shaft part, and each containing positioning groove comprises two positioning inclined faces used for limiting rotation of the handle. A positioning pin which is elastically pushed by a driving spring to be close to the outer circumferential face of the positioning shaft part is installed on the main body part of the handle in a sliding mode, a positioning head is arranged at one end of the positioning pin, and the positioning head comprises two matching inclined faces which are correspondingly matched with the two positioning inclined faces respectively. According to the utility model, the positioning accuracy of the handle is improved, so that the stability of the handle at a specific position can be ensured, and the problem that the turning lock is opened or closed by mistake due to inaccurate positioning can be avoided. And the handle can be ensured to be flush with the surface of the shell in the state of being positioned by the accommodating positioning groove, so that the overall attractiveness of the double-stroke door and window flip lock is enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of locks, in particular to a double-range door and window flip lock with accurate handle positioning. Background Art

[0002] The handle disclosed in the patent application document with reference to application number 201810480060.6 includes a handle, a base, and a shift fork. The inner wall of the base is provided with a first rack and a transmission mechanism. The transmission mechanism includes a first rotating wheel, a transmission member, and a second rotating wheel. The transmission member is provided with a second rack. The two sides of the first rotating wheel are respectively connected to the handle and the second rack gear. The second rotating wheel is connected to the transmission member shaft, and the second rotating wheel is connected to the first rack gear. The shift fork is provided with a third rack, and the third rack is connected to the second rotating wheel gear. The handle of this technical solution uses a first rotating wheel, a transmission member, and a second rotating wheel. The handle is moved to achieve linkage, which increases the travel of the shift fork. The handle can be installed in the side cavity of the door and window profile, which has a good visual effect.

[0003] However, this solution uses a steel ball's spherical surface to position the handle. If the spring is insufficient or the mounting screws are not properly positioned, the friction between the spherical surface and the circular hole will be insufficient, resulting in a misaligned position. The handle's own weight will affect the handle's side, preventing it from being flush with the housing, affecting its aesthetics. Furthermore, the market's demand for extremely narrow door and window systems is forcing door and window hardware products toward compact and aesthetically pleasing dimensions. Utility Model Content

[0004] In order to overcome the deficiencies of the prior art, the utility model provides a double-range door and window flip handle lock with accurate handle positioning.

[0005] The technical solution adopted by the utility model to solve its technical problems is:

[0006] A double-range door and window flip lock with accurate handle positioning comprises a housing, a shift fork movably connected to the housing, and a handle for controlling the movement of the shift fork; the housing is provided with a handle receiving cavity;

[0007] A rotating circular groove is provided on the main body of the handle, a positioning sleeve is provided in the rotating recess of the handle accommodating cavity, and the positioning shaft portion of the positioning sleeve is adapted to fit in the rotating circular groove;

[0008] Two accommodating positioning grooves are provided on the outer circumference of the positioning shaft portion, and each of the accommodating positioning grooves includes two positioning inclined surfaces respectively used to limit the rotation of the handle;

[0009] A positioning pin is slidably installed on the main body of the handle and is elastically pushed by a driving spring close to the outer peripheral surface of the positioning shaft. One end of the positioning pin is a positioning head for inserting into the two positioning inclined surfaces of the positioning groove. The positioning head includes two matching inclined surfaces that respectively correspond to the two positioning inclined surfaces.

[0010] In the present utility model, between the two positioning inclined surfaces of each of the accommodation positioning grooves, they are symmetrically arranged along the circumferential direction of the positioning shaft portion, and the width of the accommodation positioning groove gradually increases along the radial direction and away from the central axis of the positioning shaft portion.

[0011] In the present utility model, the cross-sectional shapes of the positioning head and the accommodation positioning groove are both V-shaped or trapezoidal.

[0012] In the present utility model, on the outer peripheral surface of the positioning shaft portion, there are protruding positioning grooves located between the two accommodation positioning grooves, and the shape of the protruding positioning groove is the same as or substantially the same as the shape of the accommodation positioning groove.

[0013] In the present utility model, on the main body portion, there is a spring pin installation groove, one end of the spring pin installation groove penetrates through the circumferential groove surface of the rotating circular groove, the positioning pin and the driving spring are both installed in the spring pin installation groove, the positioning pin is in guiding fit in the spring pin installation groove, one end of the driving spring abuts against the groove wall of the spring pin installation groove, and the other end abuts against the positioning pin. An installation limiting piece for preventing the positioning pin and the driving spring from disengaging from the spring pin installation groove is installed on the main body portion.

[0014] In the present utility model, in the spring pin installation groove, there is a telescopic limiting block for limiting the moving stroke of the positioning pin. On the positioning pin, there is a block stroke hole, and the length direction of the block stroke hole extends along the moving direction of the positioning pin. The telescopic limiting block extends into the block stroke hole.

[0015] In the present utility model, on the outer shell, there is a transmission groove cavity, and the transmission groove cavity is communicated with the rotating recess through an installation through hole. The sleeve seat body of the positioning shaft sleeve is fixed in the transmission groove cavity, and the positioning shaft portion passes through the installation through hole and extends into the rotating recess; the main body portion is connected with an extension structure for driving the fork to move in the transmission groove cavity.

[0016] In the present utility model, the extension structure includes an immovable extension rack and a movable push rod. One end of the push rod is provided with a linkage fitting groove. The main body portion is connected with an eccentric member that rotates synchronously with it. The eccentric member is located in the transmission groove cavity. An eccentric shaft portion is eccentrically provided on the eccentric member, and the eccentric shaft portion is fitted in the linkage fitting groove; an extension gear is rotatably installed on the push rod, and a fork rack is provided on the fork. The extension gear meshes with the extension rack and the fork rack.

[0017] In the present utility model, a rotating shaft portion extending along the axial direction of the rotating circular groove is convexly provided on the groove end surface of the rotating circular groove. A rotating shaft hole is provided on the positioning shaft sleeve. The rotating shaft portion is rotatably fitted inside one end of the rotating shaft hole. A mating shaft portion rotatably fitted inside the other end of the rotating shaft hole is provided on the eccentric member. The mating shaft portion is in transmission connection with the rotating shaft portion.

[0018] In the present utility model, a synchronous slot is provided on the rotating shaft portion. A synchronous insertion block inserted into the synchronous slot is provided on the mating shaft portion. The rotating shaft portion and the mating shaft portion are fixedly connected by a synchronous screw.

[0019] Advantages of the present utility model: In the present utility model, by the cooperation of the two mating inclined surfaces on the positioning pin and the two positioning inclined surfaces of the positioning shaft sleeve, the friction force between the positioning head and the receiving positioning groove is increased, making the cooperation between the positioning head and the receiving positioning groove tighter, thereby improving the accuracy of the handle positioning. This can not only ensure the stability of the handle at a specific position, but also avoid the problem of the turn-lock being accidentally opened or closed due to inaccurate positioning. Moreover, due to the improvement of the handle positioning accuracy, it can ensure that the handle is flush with the outer shell surface in the state of being positioned by the receiving positioning groove, enhancing the overall aesthetics of the turn-lock for double-range doors and windows. The present utility model replaces the traditional gear with an eccentric member, saving the internal space of the product. The cooperation between the eccentric shaft portion and the linkage mating groove can reduce the virtual position problem caused by the gear clearance. The eccentric member drives the push rod to move by using the eccentric shaft portion, and then uses the well-known double-rack and gear double-range structure to achieve that when the moving distance of the eccentric member is amplified to the fork, there is a double moving distance. Description of the Drawings

[0020] The present utility model will be further described below in conjunction with the drawings and embodiments:

[0021] Figure 1 is a three-dimensional view of the turn-lock for double-range doors and windows;

[0022] Figure 2 is an exploded view of some parts of the turn-lock for double-range doors and windows Figure 1 ;

[0023] Figure 3 is an exploded view of some parts of the turn-lock for double-range doors and windows Figure 2 ;

[0024] Figure 4 is an exploded view of the positioning shaft sleeve and the positioning pin;

[0025] Figure 5 is an installation schematic diagram of the positioning pin;

[0026] Figure 6 is a schematic diagram of the positioning head being fitted in the receiving positioning groove;

[0027] Figure 7 Parts of the handle locks for Beicheng doors and windows exploded Figure 3 ;

[0028] Figure 8 A schematic diagram of the positioning head being fitted into the accommodating positioning groove corresponding to the second recess;

[0029] Figure 9 This is a schematic diagram of the positioning head when it is extended out of the positioning slot;

[0030] Figure 10 It is a schematic diagram of the positioning head being fitted into the accommodating positioning groove corresponding to the first recess. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention.

[0032] Reference Figure 1-10 , a double-range door and window flip handle lock with accurate handle positioning, comprising a shell 1, a fork 2 movably connected to the shell 1 and a handle 3 for controlling the movement of the fork 2, the handle 3 comprising a main body 31 and a gripping portion 32, the gripping portion 32 being integrally formed on one end of the main body 31, and having high structural stability; a handle accommodating cavity is provided on the shell 1, the handle accommodating cavity comprising a rotating recess 11, a first recess 12 and a second recess 13 respectively connected to both ends of the rotating recess 11, wherein the rotating recess 11 is used to accommodate the main body 31 and allow the main body 31 to rotate, and the first recess 12 and the second recess 13 are respectively used to accommodate the gripping portion 32 in different states.

[0033] Furthermore, a rotating circular groove 33 is provided on the main body 31 of the handle 3, and a positioning sleeve 4 is provided in the rotating recess 11 of the handle accommodating cavity, and the positioning shaft portion 41 of the positioning sleeve 4 is adapted to fit in the rotating circular groove 33;

[0034] On the outer peripheral surface of the positioning shaft portion 41, there are provided two receiving positioning grooves 42, and the two receiving positioning grooves 42 respectively correspond to the first concave position 12 and the second concave position 13 of the handle receiving cavity. Each of the receiving positioning grooves 42 includes an insertion limiting surface 421 and two positioning inclined surfaces 422 respectively used for restricting the rotation of the handle 3. The two ends of the insertion limiting surface 421 are respectively connected to the ends of the two positioning inclined surfaces 422 away from the outer peripheral surface of the positioning shaft portion 41. A positioning pin 6 elastically pushed by a driving spring 5 to be close to the outer peripheral surface of the positioning shaft portion 41 is slidably installed on the main body portion 31 of the handle 3. One end of the positioning pin 6 is a positioning head 62 for inserting between the two positioning inclined surfaces 422 of the receiving positioning groove 42. The positioning head 62 includes an insertion mating surface 621 and two mating inclined surfaces 622 respectively corresponding to and mating with the two positioning inclined surfaces 422. The two ends of the insertion mating surface 621 are respectively connected to one ends of the two mating inclined surfaces 622.

[0035] In this embodiment, the two positioning inclined surfaces 422 of each of the receiving positioning grooves 42 are symmetrically arranged along the circumferential direction of the positioning shaft portion 41. The width of the receiving positioning groove 42 gradually increases along the radial direction and the direction away from the central axis of the positioning shaft portion 41. The cross-sectional shapes of the positioning head 62 and the receiving positioning groove 42 are both V-shaped or trapezoidal. Preferably, the cross-sectional shapes of the positioning head 62 and the receiving positioning groove 42 are both trapezoidal, so as to facilitate the formation of the positioning inclined surface 422 and the mating inclined surface 622.

[0036] In this embodiment, by the cooperation of the two mating inclined surfaces 622 on the positioning pin 6 and the two positioning inclined surfaces 422 of the positioning shaft sleeve 4, the friction force between the positioning head 62 and the receiving positioning groove 42 is increased, making the cooperation between the positioning head 62 and the receiving positioning groove 42 more tight, thereby improving the positioning accuracy of the handle 3. This can not only ensure the stability of the handle 3 at a specific position, but also avoid the problem of the turn-lock being accidentally opened or closed due to inaccurate positioning. Moreover, due to the improvement of the positioning accuracy of the handle 3, it can ensure that the handle 3 is flush with the surface of the housing 1 in the state of being positioned by the receiving positioning groove 42, enhancing the overall aesthetics of the double-range door and window turn-lock.

[0037] In this embodiment, on the outer peripheral surface of the positioning shaft portion 41, there is provided a protruding positioning groove located between the two receiving positioning grooves 42. The protruding positioning groove is used for the positioning head 62 to insert. The shape of the protruding positioning groove is the same as or substantially the same as the shape and size of the receiving positioning groove 42, so that the protruding positioning groove also has an adapting inclined surface adapted to the positioning inclined surface 422 to increase the friction force. After the positioning head 62 is inserted into the protruding positioning groove, the holding portion 32 can be kept in a state of protruding outside the handle receiving cavity.

[0038] As a preferred embodiment, a spring pin mounting groove 34 is provided on the main body 31, one end of the spring pin mounting groove 34 passes through the circumferential groove surface of the rotating circular groove 33, the positioning pin 6 and the drive spring 5 are both installed in the spring pin mounting groove 34, the positioning pin 6 is guided in the spring pin mounting groove 34, one end of the drive spring 5 is against the groove wall of the spring pin mounting groove 34, and the other end is against the positioning pin 6, and the main body 31 is provided with an installation limit plate 7 for preventing the positioning pin 6 and the drive spring 5 from escaping from the spring pin mounting groove 34, the installation limit plate 7 is installed on the main body 31 in a snap-fit manner, for example, a snap-fit portion 71 is provided on the installation limit plate 7, and a snap-fit groove 35 adapted to the snap-fit portion 71 is provided on the main body 31.

[0039] Furthermore, a telescopic limit block 36 for limiting the moving stroke of the locating pin 6 is provided in the elastic pin mounting groove 34, and a block stroke hole 63 is provided on the locating pin 6. The length direction of the block stroke hole 63 extends along the moving direction of the locating pin 6, and the telescopic limit block 36 extends into the block stroke hole 63.

[0040] When the positioning head 62 of the positioning pin 6 is inserted into the accommodating positioning groove 42 corresponding to the first recess 12, the gripping portion 32 of the handle 3 can be kept accommodated in the first recess 12; when the positioning head 62 of the positioning pin 6 is inserted into the accommodating positioning groove 42 corresponding to the second recess 13, the gripping portion 32 of the handle 3 can be kept accommodated in the second recess 13; in this way, the clamping and positioning of the handle 3 is achieved, thereby ensuring the stability of the positioning of the handle 3 after the lock is locked and unlocked.

[0041] In this embodiment, a spring positioning shaft is provided on the other end of the positioning pin 6, one end of the driving spring 5 is pressed against the groove surface of the spring pin mounting groove 34, and the other end is fitted on the spring positioning shaft and pressed against the other end of the positioning pin 6, thereby providing spring force to the positioning pin 6.

[0042] As a preferred embodiment, a transmission groove cavity 14 is provided on the outer shell 1, and the transmission groove cavity 14 is connected to the rotating recess 11 through a mounting through hole. The sleeve seat body 40 of the positioning sleeve 4 is fixed in the transmission groove cavity 14, and the positioning shaft portion 41 passes through the mounting through hole and extends into the rotating recess 11. The main body 31 is connected with an extended-range structure for driving the shift fork 2 to move in the transmission groove cavity 14.

[0043] Furthermore, the range-extending structure includes an immovable range-extending rack 15 and a movable push rod 8, one end of the push rod 8 is provided with a linkage matching groove 81, the main body 31 is connected to an eccentric member 9 that rotates synchronously therewith, the eccentric member 9 is located in the transmission groove cavity 14, and an eccentric shaft portion 91 for driving the push rod 8 to move relative to the range-extending rack 15 is eccentrically provided on the eccentric member 9, the eccentric shaft portion 91 is matched in the linkage matching groove 81, and the linkage matching groove 81 includes at least two for engaging with the eccentric shaft portion 91 sliding contact linkage mating surface; the push rod 8 is rotatably mounted with an extender gear 82, and the shift fork 2 is provided with a shift fork rack 21 that drives the shift fork 2 to move when the range-extending gear 82 rotates. The shift fork rack 21 and the shift fork 2 are integrally formed, with high structural stability, and are conducive to the synchronous movement of the shift fork 2 and the shift fork rack 21; the range-extending gear 82 is engaged with the range-extending rack 15 and the shift fork rack 21, so that the range-extending gear 82 can be driven by the range-extending rack 15 to rotate and drive the shift fork rack 21 to move.

[0044] When the handle 3 is rotated, the eccentric shaft 91 of the eccentric member 9 drives the push rod 8 to move within the transmission groove 14, and the range-extending gear 82 moves synchronously under the drive of the push rod 8. At this time, since the range-extending gear 82 is meshed with the range-extending rack 15, the range-extending gear 82 is simultaneously driven to rotate by the range-extending rack 15 during the movement process, causing the range-extending gear 82 to rotate and push the fork rack 21 on the shift fork 2, thereby moving the shift fork 2. This embodiment uses the eccentric member 9 to replace the traditional gear, uses the eccentric shaft 91 to drive the push rod 8 to move, and then utilizes the known double-range structure of the double rack and gear to achieve a double movement distance of the eccentric member 9 when the movement distance is amplified to that of the shift fork 2. Moreover, since the eccentric member 9 does not need to be provided with convex teeth on its circumferential surface, the eccentric member 9 occupies less space than traditional gears, saving internal space of the product, thereby reducing the overall size of the double-range door and window flip handle lock to a certain extent. In addition, the cooperation between the eccentric shaft and the linkage matching groove can reduce the virtual position problem caused by the gear clearance.

[0045] As a preferred embodiment, a rotating shaft portion 35 extending axially along the rotating circular groove 33 is protruded from the groove end surface of the rotating circular groove 33. The positioning sleeve 4 is provided with a rotating shaft hole 43. One end of the rotating shaft hole 43 passes through the end surface of the positioning shaft portion 41, and the other end passes through the sleeve seat body 40. The rotating shaft portion 35 is rotatably adapted within one end of the rotating shaft hole 43. The eccentric member 9 is provided with a mating shaft portion 92 that is rotatably adapted within the other end of the rotating shaft hole 43. The mating shaft portion 92 is in transmission connection with the rotating shaft portion 35, thereby achieving the purpose of synchronous rotation. Specifically: the rotating shaft portion 35 is provided with a synchronization slot 351, and the mating shaft portion 92 is provided with a synchronization plug 93 that is inserted into the synchronization slot 351. The rotating shaft portion 35 and the mating shaft portion 92 are fixedly connected using a synchronization screw.

[0046] As a preferred embodiment, two gear mounting portions are provided on the push rod 8, a gear mounting position 83 is formed between the two gear mounting portions, and the range extension gear 82 is located in the gear mounting position 83 and is rotatably connected to the two gear mounting portions at both ends, so as to achieve the purpose of rotatably mounting the range extension gear 82 on the push rod 8.

[0047] As a preferred embodiment, the range extension rack 15 is integrally formed with the housing 1, so that the range extension rack 15 is immovably arranged in the transmission groove cavity 14, and at the same time, the stability of the range extension rack 15 is improved. Further, an installation notch 16 communicating with the transmission groove cavity 14 is provided on the first side of the housing 1. The installation notch 16 is used to facilitate the installation of each component in the transmission groove cavity 14, and the installation notch 16 is closed by a side cover 10 to prevent foreign objects from entering the transmission groove cavity 14.

[0048] As a preferred embodiment, a transmission notch 17 communicating with the transmission groove cavity 14 is provided on the second side of the housing 1, and one end of the fork 2 connecting the fork rack 21 extends into the transmission groove cavity 14 from the transmission notch 17.

[0049] As a preferred embodiment, a first moving guide groove 101 and a second moving guide groove 102 for guiding are provided on the side cover 10. A first guiding portion 22 guidingly fitted in the first moving guide groove 101 is provided on the fork 2, and a second guiding portion 84 guidingly fitted in the second moving guide groove 102 is provided on the push rod 8, so as to achieve the guiding installation of the fork 2 and the push rod 8, ensure the moving quality when the fork 2 and the push rod 8 move, and thus enable the fork 2 and the push rod 8 to stably achieve transmission.

[0050] The above are only the preferred embodiments of the present invention. As long as the technical solutions that achieve the purpose of the present invention by substantially the same means fall within the protection scope of the present invention.

Claims

1. A double - range door and window turn - over lock with accurate handle positioning, comprising a housing (1), a fork (2) movably connected to the housing (1), and a handle (3) for controlling the movement of the fork (2); a handle receiving cavity is provided on the housing (1); it is characterized in that: A rotating circular groove (33) is provided on the main body part (31) of the handle (3), a positioning shaft sleeve (4) is provided in the rotating concave position (11) of the handle receiving cavity, and the positioning shaft part (41) of the positioning shaft sleeve (4) is adapted to be within the rotating circular groove (33); Two receiving positioning grooves (42) are provided on the outer peripheral surface of the positioning shaft part (41), and each of the receiving positioning grooves (42) includes two positioning inclined surfaces (422) respectively for restricting the rotation of the handle (3); A positioning pin (6) elastically pushed by a driving spring (5) to be close to the outer peripheral surface of the positioning shaft part (41) is slidably installed on the main body part (31) of the handle (3). One end of the positioning pin (6) is a positioning head (62) for inserting between the two positioning inclined surfaces (422) of the receiving positioning groove (42), and the positioning head (62) includes two mating inclined surfaces (622) respectively corresponding to and mating with the two positioning inclined surfaces (422).

2. The double-range door and window turn-lock with accurate handle positioning according to claim 1, characterized in that: The two positioning inclined surfaces (422) of each of the receiving positioning grooves (42) are symmetrically arranged along the circumferential direction of the positioning shaft part (41), and the width of the receiving positioning groove (42) gradually increases along the radial direction and away from the central axis of the positioning shaft part (41).

3. The double - distance door and window turning lock with accurate handle positioning according to claim 1, characterized in that: The cross - sectional shapes of the positioning head (62) and the receiving positioning groove (42) are both V - shaped or trapezoidal.

4. The double-range door and window turning lock with accurate handle positioning according to claim 2, characterized in that: An extending positioning groove is provided on the outer peripheral surface of the positioning shaft part (41) and is located between the two receiving positioning grooves (42), and the shape of the extending positioning groove is the same as that of the receiving positioning groove (42) in terms of shape and size.

5. The double - range door and window turning lock with accurate handle positioning according to claim 1, characterized in that: A spring pin installation groove (34) is provided on the main body part (31), one end of the spring pin installation groove (34) penetrates through the circumferential groove surface of the rotating circular groove (33), the positioning pin (6) and the driving spring (5) are both installed in the spring pin installation groove (34), the positioning pin (6) is in guiding fit in the spring pin installation groove (34), one end of the driving spring (5) abuts against the groove wall of the spring pin installation groove (34), and the other end abuts against the positioning pin (6). An installation limiting piece (7) for preventing the positioning pin (6) and the driving spring (5) from detaching from the spring pin installation groove (34) is installed on the main body part (31).

6. The double-range window and door reverse lock with accurate handle positioning according to claim 5, characterized in that: A telescopic limiting block (36) for limiting the moving stroke of the positioning pin (6) is provided in the spring pin installation groove (34), a block stroke hole (63) is provided on the positioning pin (6), the length direction of the block stroke hole (63) extends along the moving direction of the positioning pin (6), and the telescopic limiting block (36) extends into the block stroke hole (63).

7. The double - stroke door and window turning lock with accurate handle positioning according to claim 1, characterized in that: A drive groove cavity (14) is provided on the outer shell (1). The drive groove cavity (14) is communicated with the rotary recess (11) through an installation through hole. The bushing seat body (40) of the positioning bushing (4) is fixed in the drive groove cavity (14), and the positioning shaft portion (41) passes through the installation through hole and extends into the rotary recess (11). The main body portion (31) is connected with an extension structure for driving the fork (2) to move in the drive groove cavity (14).

8. The double-range door and window turning lock with accurate handle positioning according to claim 7, characterized in that: The extension structure includes a non-movable extension rack (15) and a movable push rod (8). A linkage fitting groove (81) is provided at one end of the push rod (8). The main body portion (31) is connected with an eccentric member (9) that rotates synchronously with it. The eccentric member (9) is located in the drive groove cavity (14). An eccentric shaft portion (91) is eccentrically provided on the eccentric member (9), and the eccentric shaft portion (91) is fitted in the linkage fitting groove (81). An extension gear (82) is rotatably installed on the push rod (8). A fork rack (21) is provided on the fork (2), and the extension gear (82) meshes with the extension rack (15) and the fork rack (21).

9. The double-range window and door turning lock with accurate handle positioning according to claim 8, characterized in that: A rotary shaft portion (35) extending along the axial direction of the rotary circular groove (33) is convexly provided on the groove end surface of the rotary circular groove (33). A rotary shaft hole (43) is provided on the positioning bushing (4). The rotary shaft portion (35) is rotatably fitted in one end of the rotary shaft hole (43). A fitting shaft portion (92) that is rotatably fitted in the other end of the rotary shaft hole (43) is provided on the eccentric member (9), and the fitting shaft portion (92) is in transmission connection with the rotary shaft portion (35).

10. A double-range door and window turning lock with accurate handle positioning according to claim 9, characterized in that: A synchronous slot (351) is provided on the rotary shaft portion (35). A synchronous insert block (93) that is inserted into the synchronous slot (351) is provided on the fitting shaft portion (92). The rotary shaft portion (35) and the fitting shaft portion (92) are fixedly connected by a synchronous screw.

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