CN111395886B

CN111395886B - Top and bottom lock catch of double-door flat iron lock rod of cabinet and assembly method

Info

Publication number: CN111395886B
Application number: CN202010356593.0A
Authority: CN
Inventors: 濮伟新; 徐苗; 袁小兵
Original assignee: WUXI KANGBEI ELECTRONIC EQUIPMENT CO Ltd
Current assignee: WUXI KANGBEI ELECTRONIC EQUIPMENT CO Ltd
Priority date: 2020-04-29
Filing date: 2020-04-29
Publication date: 2023-07-07
Anticipated expiration: 2040-04-29
Also published as: CN111395886A

Abstract

The invention relates to a top-bottom lock catch of a double-door flat iron lock rod of a cabinet and an assembly method, wherein the top-bottom lock catch comprises a base body, the cross section of the base body is of a long waist round structure, and a positioning table is integrally arranged above the base body; a square groove is formed in one side surface of the base body, and the base body, the square groove and the positioning table are symmetrically arranged on the first symmetry plane of the base body; the upper surface of the positioning table is a first positioning surface, a concave table is arranged on one side of the positioning table, a screw hole is formed in the symmetrical center of the positioning table, the positioning table extends into the base body and is stopped at the first groove side face of the square groove, two cylindrical pins protruding out of the first positioning surface are symmetrically arranged on the concave tables on two sides of the screw hole, the central longitudinal section of the concave table is a second symmetrical surface which is offset from the first symmetrical surface, and the screw hole and the two cylindrical pins are symmetrically separated by taking the second symmetrical surface as the center. The structure of the invention is simplified from the original top lock catch and bottom lock catch into a single-piece top lock catch and a single-piece bottom lock catch, and the top lock catch and the bottom lock catch are provided with a rotationally symmetrical structure, thereby reducing the types of the accessories and realizing the functions of two pieces by one piece.

Description

Top and bottom lock catch of double-door flat iron lock rod of cabinet and assembly method

Technical Field

The invention relates to the technical field of cabinet accessories, in particular to a top-bottom lock catch of a double-door flat iron lock rod of a cabinet and an assembly method.

Background

In the prior art, in the cabinet production process, a top lock catch and a door stop are designed together, so that when the door stop is arranged on a top and bottom frame of the cabinet, the door stop is divided into two parts, and the function of locking left and right door plates on the top and bottom frame in sequence by a flat iron lock rod can be realized. In the double-door cabinet, the upper door shield and the lower door shield have complex multifunctional appearance structures, the structures are the same but are divided into two parts, two sets of dies are opened, the upper part, the lower part, the left part and the right part are required to be distinguished during assembly, the tightness after assembly is ensured, the working efficiency on an assembly line is low, and the assembled structure does not meet the requirements on stress and sealing performance.

Disclosure of Invention

The applicant provides a double door flat iron lock rod top-bottom lock catch and an assembly method of a cabinet aiming at the defects in the prior art, and solves the problems of multiple functions caused by the fact that the double door top-bottom lock rod cannot be interchanged up and down and left and right, the upper and lower are asymmetric and the sealing is deficient through the eccentric symmetrical design of the lock catch and the split structure of the lock catch and a door stop.

The technical scheme adopted by the invention is as follows:

a cabinet double door flat iron lock rod top-bottom lock catch has the structure that: the positioning table with the increased size and the same long-waist round structure in section is integrally arranged above the base body; a square groove is formed in one side surface of the base body, and the base body, the square groove and the positioning table are symmetrically arranged by taking a first symmetry plane of a central longitudinal section of the base body as a center; the upper surface of locating bench is first locating surface, and one side is equipped with round waist circular groove on the first locating surface, and its inner circle forms the concave station, the symmetry center department of concave station is equipped with the screw, and it extends to the base member in to end in the groove side of square groove one, be located the concave station symmetry of screw both sides and be equipped with two cylindric locks that bulge in first locating surface, the central longitudinal section of concave station is the second symmetry face, and screw, two cylindric locks are all put as central symmetry with the second symmetry face.

As a further improvement of the above technical scheme:

a space is formed between the first symmetrical plane and the second symmetrical plane.

And a plurality of groove edge chamfers are arranged on the edges of the groove side surface I, which is close to one side of the positioning table, and the groove side surface II, which is far away from one side of the positioning table, in the square groove.

The bottom surface of the base body is a base surface, and a boss is arranged in the middle of the base body.

An assembling method of a double door flat iron lock rod top-bottom lock catch of a cabinet specifically comprises the following steps:

the first step: assembling a first set of world locking assemblies: the installation object of the top-bottom lock catch is a door shield, one side of the upper part of the door shield is provided with a U-shaped groove for accommodating the top-bottom lock catch, the side surface of the door shield is provided with a first through hole and a second through hole, the lower part of the door shield is provided with a bent positioning part, the structure of the door shield comprises a horizontal section and a vertical section, and the corresponding bottom surfaces are respectively a first installation surface and a second positioning surface extending from one side of the first installation surface; counter bores are uniformly formed in the horizontal section and the vertical section respectively; when the top and bottom lock catch and the door shield are preassembled, firstly, the sealing gasket is placed in a concave table of the top and bottom lock catch, two cylindrical pins of the top and bottom lock catch penetrate through a through hole III of the sealing gasket and are inserted into a through hole I of the door shield, and then a screw is used for locking into a screw hole of the top and bottom lock catch from a through hole IV of the sealing gasket, so that a first positioning surface is attached to a U-shaped groove vertical surface of the door shield, preassembly is completed, and the top and bottom lock catch assembly is formed; in the same way, a second group of heaven and earth lock catch assemblies are assembled, and the difference is that the heaven and earth lock catches in the second group of heaven and earth lock catch assemblies symmetrically rotate 180 degrees by taking the first symmetry plane as a center;

and a second step of: assembling a first set of top and bottom latch assemblies to a bottom frame of a cabinet frame: the third symmetrical surface in the width direction of the bottom frame is taken as a symmetrical center, the left door and the right door are respectively arranged at two sides, and a door gap width D2 is formed in the middle; the first mounting surface and the second positioning surface of the door shield are respectively abutted with the second mounting surface and the third mounting surface of the bottom frame, and meanwhile, the axis of a counter bore at the outermost side of the door shield is coincident with the third symmetrical surface, so that the heaven-earth lock catch assembly is positioned at a locking and fixing position; at this time, relative to the third symmetrical surface of the cabinet frame, the top and bottom lock catch assembly is in an offset state, at least two counter bores can be aligned with the counter die number holes of the bottom frame, and one counter bore falls on the third symmetrical surface;

and a third step of: assembling a second set of top and bottom latch assemblies to a top frame of the cabinet frame corresponding to the bottom frame position: the top frame and the bottom frame are provided with the same third symmetrical surface, the top frame and the bottom frame are vertically opposite in the height direction, and the two groups of heaven and earth lock catch components are respectively arranged on the top frame and the bottom frame in the same cabinet frame and are offset to the same side of the third symmetrical surface in the width direction; the first group of the heaven and earth lock catch components arranged on the top frame rotate 180 degrees relative to the second group of the heaven and earth lock catch components arranged on the bottom frame, and after the door shield is rotated, the first mounting surface and the second positioning surface of the door shield are respectively abutted with the second mounting surface and the third mounting surface of the top frame, the axes of counter bores of the door shield are overlapped with the third symmetry surface, at least two counter bores can be aligned with the top modulus holes of the top frame, and one counter bore is located on the third symmetry surface; at this time, the square groove of the top-bottom lock catch is opposite to the square groove of the bottom-top lock catch in the height direction of the cabinet frame, the first groove side surfaces and the second groove side surfaces are respectively corresponding and coplanar, the flat iron lock rod can be smoothly wedged into the square grooves of the top and the bottom, and at this time, the upper end of the lock rod and the lower end of the lock rod can be abutted and slid on the second groove side surfaces coplanar at the upper part and the lower part until the stroke is ended and locked.

The beneficial effects of the invention are as follows:

the invention has compact and reasonable structure and convenient operation, simplifies the original top lock catch and bottom lock catch into a single-piece top lock catch and a single-piece bottom lock catch, and has a rotationally symmetrical structure, thereby reducing the types of the accessories and realizing the functions of two pieces.

The invention converts the original single piece into the assembly component, realizes the modularized design, is beneficial to optimizing and improving the structure with unreasonable part and has a wider range of application types.

The invention adopts the separation of the positioning and locking functions, so that the design of the stress structure and the sealing structure is more reasonable and reliable.

The invention can realize the exchange of the assembly positions of the left door and the right door through the rotation and displacement installation of the top lock catch and the bottom lock catch, has strong compatibility and greatly expands the applicability and the function of products.

The invention simplifies the simple functional design, greatly reduces the manufacturing cost, improves the assembly efficiency and is more humanized.

Drawings

Fig. 1 is a schematic perspective view of an heaven and earth lock catch of the present invention.

Fig. 2 is a front view of fig. 1.

Fig. 3 is a cross-sectional view taken along section A-A in fig. 2.

Fig. 4 is a top view of fig. 1.

Fig. 5 is a bottom view of fig. 1.

Fig. 6 is an exploded view of the inventive world locker assembly.

Fig. 7 is a schematic structural view of the heaven and earth locking assembly of the present invention.

Fig. 8 is a schematic view showing the working state of the inventive heaven and earth locking assembly assembled on the bottom frame of the cabinet frame.

Fig. 9 is a schematic view showing the working state of the heaven and earth locking assembly assembled on the top frame of the cabinet frame.

Fig. 10 is a view showing the working state of two sets of the heaven and earth locking components along the height of the cabinet frame.

Wherein: 10. a top-bottom lock catch; 20. a sealing gasket; 30. a door stop; 40. a screw; 50. a top-bottom lock catch assembly; 60. a left door; 70. flat iron lock rod; 80. a third plane of symmetry; 90. a right door; 100. a bottom frame; 110. a top frame; 101. a base surface; 102. a boss; 103. a first plane of symmetry; 104. a square groove; 105. chamfering the edges of the grooves; 106. a concave table; 107. a second plane of symmetry; 108. a cylindrical pin; 109. a first positioning surface; 1010. a screw hole; 1001. a second mounting surface; 1002. a bottom module hole; 1003. a third mounting surface; 1102. a top module hole; 1011. a first groove side surface; 1012. groove side second, the second step; 301. u-shaped groove elevation; 302. a first mounting surface; 303. a second positioning surface; 304. countersink; 305. a second through hole; 306. a first through hole; 203. a fourth via hole; 204. a third via hole; 701. the upper end of the lock rod; 702. the lower end of the lock rod.

Detailed Description

The following describes specific embodiments of the present invention with reference to the drawings.

As shown in fig. 1 to 5, the structure of the space lock 10 of the double door flat iron lock rod of the cabinet of the present embodiment is: the device comprises a base body, wherein the cross section of the base body is of a long-waist round structure, and a positioning table with an increased size and a long-waist round structure is integrally arranged above the base body; a square groove 104 is formed in one side surface of the base body, and the base body, the square groove 104 and the positioning table are symmetrically arranged by taking a first symmetrical plane 103 of the central longitudinal section of the base body as a center; the upper surface of the positioning table is a first positioning surface 109, one side of the first positioning surface 109 is provided with a circle of waist-shaped groove, the inner ring of the positioning surface 109 forms a concave table 106, a screw hole 1010 is arranged at the symmetrical center of the concave table 106, the screw hole 1010 extends into the matrix and is stopped at a first 1011 side surface of the square groove 104, two cylindrical pins 108 protruding from the first positioning surface 109 are symmetrically arranged on the concave table 106 at two sides of the screw hole 1010, the central longitudinal section of the concave table 106 is a second symmetrical surface 107, and the screw hole 1010 and the two cylindrical pins 108 are symmetrically separated by taking the second symmetrical surface 107 as the center.

As shown in fig. 4, a space is formed between the first symmetry plane 103 and the second symmetry plane 107, which space is denoted as D1 as shown in fig. 4.

The edges of the square groove 104, which are close to the first groove side 1011 and far from the second groove side 1012, are respectively provided with a plurality of groove edge chamfers 105.

As shown in fig. 5, the bottom surface of the base body is a base surface 101, and a boss 102 is provided in the middle thereof.

The cabinet double-door flat iron lock rod top-bottom lock catch of the embodiment adopts the design principle that:

the first positioning surface 109 is used to abut against the U-shaped groove elevation 301 of the door stop 30 in fig. 6 and 7; the square groove 104 is used for accommodating the upper end 701 and the lower end 702 of the flat iron lock rod 70 in fig. 10, and the combination of the groove edge chamfer 105 and the groove side face two 1012 can form reliable guiding and locking when the upper end 701 and the lower end 702 of the lock rod enter the square groove 104; on the first positioning surface 109 side, the concave table 106 uses the second symmetry surface 107 as a symmetry center, and a offset distance D1 is provided between the second symmetry surface 107 of the concave table 106 and the first symmetry surface 103 of the boss 102 (as shown in fig. 4);

a screw hole 1010 is formed at the symmetrical center of the bottom of the concave table 106 and is stopped at the first 1011 side surface of the groove, and similarly, two cylindrical pins 108 are pulled out by taking the bottom of the concave table 106 as a base surface, and two sides are separated by taking the second symmetrical surface 107 as the center and protrude out of the first positioning surface 109.

Wherein the recess 106 is adapted to receive the gasket seal 20 of fig. 6; the double cylindrical pins 108 can be inserted into the first through holes 306 of the door stop 30 through the third through holes 204 of the sealing gasket 20 to position the top-bottom lock catch 10 and bear and transmit the shearing force when the flat iron lock rod 70 is locked; a screw hole 1010 is formed at the symmetrical center of the bottom of the concave table 106 and is stopped at the first 1011 side of the groove, and is matched with the screw 40 in fig. 6, so as to lock the top-bottom lock catch 10 onto the U-shaped groove vertical surface 301 to form the top-bottom lock catch assembly 50, and at this moment, the sealing gasket 20 elastically fills the concave table 106 after the first positioning surface 109 of the top-bottom lock catch 10 is abutted with the U-shaped groove vertical surface 301 of the door stop 30, so as to form multi-point sealing on the screw hole 1010, the second 305 and the first 306 side of the through hole.

As shown in fig. 6-10, the assembling method of the top-bottom lock catch of the double door flat iron lock rod of the cabinet in the embodiment specifically includes the following steps:

the first step: assembling a first set of top and bottom shackle assemblies 50:

as shown in fig. 6 and 7, the installation object of the top-bottom lock catch 10 is a door shield 30, one side of the upper part of the door shield 30 is provided with a U-shaped groove for accommodating the top-bottom lock catch 10, the side surface of the door shield 30 is provided with a first through hole 306 and a second through hole 305, the lower part of the door shield 30 is provided with a bent positioning part, the structure of the door shield comprises a horizontal section and a vertical section, and the corresponding bottom surfaces are respectively a first installation surface 302 and a second positioning surface 303 which is bent and extended at one side of the first installation surface 302;

counter bores 304 are uniformly formed in the horizontal section and the vertical section respectively; when the top and bottom lock catch 10 and the door shield 30 are preassembled, firstly, the sealing gasket 20 is placed in the concave table 106 of the top and bottom lock catch 10, two cylindrical pins 108 of the top and bottom lock catch 10 penetrate through the through holes III 204 of the sealing gasket 20 and then are inserted into the through holes I306 of the door shield 30, and then are locked into the screw holes 1010 of the top and bottom lock catch 10 from the through holes IV 203 of the sealing gasket 20 by the bolts 40, so that the first positioning surface 109 is attached to the U-shaped groove vertical surface 301 of the door shield 30 to complete preassembly, and the top and bottom lock catch assembly 50 is formed; in the same manner as described above, the second set of the top-bottom latch assemblies 50 is assembled, except that the top-bottom latches 10 in the second set of the top-bottom latch assemblies 50 are rotated 180 ° symmetrically about the first symmetry plane 103;

and a second step of: the first set of top and bottom latch assemblies 50 are assembled to the bottom frame 100 of the cabinet frame:

as shown in fig. 8, the left door 60 and the right door 90 are separated on both sides with the third symmetry plane 80 in the width direction of the bottom frame 100 as the symmetry center, and a gap width D2 (shown in fig. 8) is formed in the middle;

the first mounting surface 302 and the second positioning surface 303 of the door shield 30 are respectively abutted with the second mounting surface 1001 and the third mounting surface 1003 of the bottom frame 100, and meanwhile, the axis of the counter bore 304 at the outermost side of the door shield 30 coincides with the third symmetrical surface 80, so that the top-bottom lock catch assembly 50 is in a locking and fixing position; at this point, with respect to the third plane of symmetry 80 of the cabinet frame, the top-bottom latch assembly 50 is in an offset condition, with at least two counter bores 304 capable of being aligned with the bottom modular holes 1002 of the bottom frame 100 and one of the counter bores 304 falling on the third plane of symmetry 80;

and a third step of: the second set of top and bottom latch assemblies 50 are assembled to the top frame 110 of the cabinet frame corresponding to the location of the bottom frame 100:

as shown in fig. 9 and 10, the top frame 110 and the bottom frame 100 have the same third symmetry plane 80, and are opposite to each other in the height direction, and the two sets of the space lock assemblies 50 are respectively mounted on the top frame 110 and the bottom frame 100 in the same cabinet frame, and are offset from the same side of the third symmetry plane 80 in the width direction;

the first set of top-bottom locking assemblies 50 mounted to the top frame 110 is rotated 180 ° relative to the second set of top-bottom locking assemblies 50 mounted to the bottom frame 100, and after the door stop 30 is rotated, the first mounting surface 302 and the second positioning surface 303 of the door stop 30 are respectively abutted to the second mounting surface 1001 and the third mounting surface 1003 of the top frame 110, and the axes of the counter bores 304 of the door stop 30 are coincident with the third symmetry surface 80, at least two counter bores 304 can be aligned with the top module holes 1102 of the top frame 110, and one of the counter bores 304 falls on the third symmetry surface 80; at this time, the square groove 104 of the top-mounted top-bottom latch 10 is opposite to the square groove 104 of the bottom-mounted top-bottom latch 10 in the height direction of the cabinet frame, the two sets of groove side surfaces 1011 and the groove side surfaces 1012 are respectively coplanar, the flat iron lock rod 70 can be smoothly wedged into the square grooves 104 of the top and bottom, and at this time, the upper end 701 of the lock rod and the lower end 702 of the lock rod can be abutted and slid on the groove side surfaces 1012 of the upper and lower coplanar parts until the stroke is completed.

As can be seen from the above assembly embodiment, the offset D1 of the first plane of symmetry 103 and the second plane of symmetry 107 of the top-bottom shackle 10 is the basis for locking the top-bottom shackle assembly 50 after a 180 degree rotation of the center symmetry. The multifunctional design requirement of the part with a single structure is achieved through rotary displacement. Further, in a single cabinet product with double doors, the spatial positions of the left door 60 and the right door 90 are interchanged, that is, the left door 60 is mounted on the hinge support of the right door, and the right door 90 is mounted on the hinge support of the left door, which can be achieved just by biasing the space-earth locking assembly 50 to the other side of the third symmetry plane 80 of the frame in the width direction, so that the double-door cabinet can achieve division without the left door and the right door, and brings great flexibility and convenience for design, installation, overhaul and maintenance, and greatly improves the compatibility of product use.

The above description is intended to illustrate the invention and not to limit it, the scope of which is defined by the claims, and any modifications can be made within the scope of the invention.

Claims

1. The utility model provides a rack bi-parting band iron locking lever world hasp which characterized in that: the structure of the heaven and earth lock catch (10) is as follows: the positioning table with the increased size and the same long-waist round structure in section is integrally arranged above the base body; a square groove (104) is formed in one side surface of the base body, and the base body, the square groove (104) and the positioning table are symmetrically arranged by taking a first symmetry plane (103) of the central longitudinal section of the base body as a center; the upper surface of locating bench is first locating surface (109), one side is equipped with round waist circular groove on first locating surface (109), and its inner circle forms concave station (106), the symmetry center department of concave station (106) is equipped with screw (1010), and it extends to the base member to end in groove side one (1011) of square groove (104), be located concave station (106) of screw (1010) both sides on the symmetry be equipped with two cylindric lock (108) of protrusion in first locating surface (109), the central longitudinal section of concave station (106) is second symmetry surface (107), screw (1010), two cylindric locks (108) are all put as central symmetry branch with second symmetry surface (107).

2. The cabinet double door flat iron lock lever heaven and earth lock catch according to claim 1, wherein: a space is formed between the first symmetry plane (103) and the second symmetry plane (107).

3. The cabinet double door flat iron lock lever heaven and earth lock catch according to claim 1, wherein: a plurality of groove edge chamfers (105) are arranged on edges of a first groove side surface (1011) close to the positioning table and a second groove side surface (1012) far away from the positioning table in the square groove (104).

4. The cabinet double door flat iron lock lever heaven and earth lock catch according to claim 1, wherein: the bottom surface of the base body is a base surface (101), and a boss (102) is arranged in the middle of the base body.

5. An assembling method of a top-bottom lock catch of a flat iron lock rod of a double door of a cabinet according to claim 1, which is characterized in that: the method specifically comprises the following steps:

the first step: assembling a first set of top and bottom shackle assemblies (50):

the installation object of the top-bottom lock catch (10) is a door shield (30), one side of the upper part of the door shield (30) is provided with a U-shaped groove for accommodating the top-bottom lock catch (10), the side surface of the door shield is provided with a first through hole (306) and a second through hole (305), the lower part of the door shield (30) is provided with a bent positioning part, the structure of the door shield comprises a horizontal section and a vertical section, and the corresponding bottom surfaces are respectively a first installation surface (302) and a second positioning surface (303) which is bent and extends at one side of the first installation surface (302); counter bores (304) are uniformly formed in the horizontal section and the vertical section respectively;

when the top and bottom lock catch (10) and the door shield (30) are preassembled, firstly, the sealing gasket (20) is placed in the concave table (106) of the top and bottom lock catch (10), two cylindrical pins (108) of the top and bottom lock catch (10) penetrate through a through hole III (204) of the sealing gasket (20), then are inserted into a through hole I (306) of the door shield (30), and then are locked into screw holes (1010) of the top and bottom lock catch (10) from a through hole IV (203) of the sealing gasket (20) by screws (40), so that a first positioning surface (109) is attached to a U-shaped groove vertical surface (301) of the door shield (30), and preassembling is completed to form the top and bottom lock catch assembly (50);

in the same way as above, a second set of the heaven and earth locking components (50) are assembled, except that the heaven and earth locking components (10) in the second set of heaven and earth locking components (50) are symmetrically rotated 180 degrees by taking the first symmetry plane (103) as a center;

and a second step of: assembling a first set of top and bottom latch assemblies (50) to a bottom frame (100) of a cabinet frame:

the third symmetrical surface (80) in the width direction of the bottom frame (100) is taken as a symmetrical center, the left door (60) and the right door (90) are respectively arranged at two sides, and a door gap width D2 is formed in the middle; the first mounting surface (302) and the second positioning surface (303) of the door shield (30) are respectively abutted with the second mounting surface (1001) and the third mounting surface (1003) of the bottom frame (100), meanwhile, the axis of the counter bore (304) at the outermost side of the door shield (30) coincides with the third symmetrical surface (80), and the top and bottom lock catch assembly (50) is located at a locking and fixing position; at this time, relative to the third symmetry plane (80) of the cabinet frame, the top-bottom lock catch assembly (50) is in an offset state, at least two counter bores (304) can be aligned with the counter die number holes (1002) of the bottom frame (100), and one counter bore (304) falls on the third symmetry plane (80);

and a third step of: assembling a second set of top and bottom latch assemblies (50) to a top frame (110) of the cabinet frame corresponding to the position of the bottom frame (100): the top frame (110) and the bottom frame (100) are provided with the same third symmetrical surface (80), the top frame and the bottom frame are vertically opposite in the height direction, and the two groups of heaven-earth lock catch assemblies (50) are respectively arranged on the top frame (110) and the bottom frame (100) in the same cabinet frame and are offset on the same side of the third symmetrical surface (80) in the width direction;

the first group of heaven and earth lock catch components (50) arranged on the top frame (110) need to rotate 180 degrees relative to the second group of heaven and earth lock catch components (50) arranged on the bottom frame (100), after the door shield (30) is in a bilateral symmetry structure, after the door shield is rotated, the first mounting surface (302) and the second positioning surface (303) of the door shield (30) are respectively abutted with the second mounting surface (1001) and the third mounting surface (1003) of the top frame (110), the axes of counter bores (304) of the door shield (30) are overlapped with the third symmetry surface (80), and at least two counter bores (304) can be aligned with the top modulus hole (1102) of the top frame (110) and one counter bore (304) falls on the third symmetry surface (80); at this time, the square groove (104) of the top-mounted top-bottom lock catch (10) and the square groove (104) of the bottom-mounted top-bottom lock catch (10) are vertically opposite in the height direction of the cabinet frame, the two groups of groove side surfaces (1011) and the groove side surfaces (1012) are respectively corresponding to be coplanar, the flat iron lock rod (70) can be smoothly wedged into the square grooves (104) at the top and the bottom, and at this time, the upper end (701) of the lock rod and the lower end (702) of the lock rod can be abutted and slid on the groove side surfaces (1012) coplanar at the upper part and the lower part until the stroke is ended and locked.