A handle structure

Abstract

The utility model discloses a handle structure, including former handle subassembly and rear handle subassembly, former handle subassembly includes former handle seat and former handle main part, be equipped with former rotating part on former handle main part, rear handle subassembly includes rear handle seat and rear handle main part, be equipped with rear rotating part on rear handle main part, and former rotating part and rear rotating part are connected through square bar linkage, former handle seat and rear handle seat still are equipped with respectively for former rotating part and rear rotating part reset former reset component and rear reset component, and former reset component and rear reset component structure are same, and former reset component includes support and elastic part, and former rotating part outer periphery is equipped with convex part, when former handle main part drives former rotating part rotation, and the convex part on former rotating part pushes the support and moves to the direction of far from former rotating part, when loosens former handle main part, and the elastic part pushes the support and makes former rotating part return to the original position, the utility model discloses structure is more stable and reliable, and the handle cannot return to the situation and will not take place.

Description

TECHNICAL FIELD

[0001] The utility model relates to handle technical field, especially a handle structure with more stable structure. BACKGROUND

[0002] Door and window are the most common structure in building, usually as the room access channel and ventilation and lighting port of building, with the development of modern building and the improvement of user demand, door and window structure is continuously improved, handle as the indispensable component on door and window is installed on door and window fan to realize the opening and locking of door and window fan. UTILITY MODEL CONTENTS

[0003] The utility model discloses a handle structure, the utility model structure is more stable and reliable, can not appear handle cannot return to the situation occurs, can significantly improve user experience.

[0004] To realize above-mentioned purpose, the utility model provides the following technical scheme: a handle structure, including front handle subassembly and rear handle subassembly, the front handle subassembly includes front handle seat and the front handle main part of rotation setting on the front handle seat, be equipped with the front rotation piece on the front handle main part, the rear handle subassembly includes rear handle seat and the rear handle main part of rotation setting on the rear handle seat, be equipped with the rear rotation piece on the rear handle main part, the front rotation piece is connected with rear rotation piece through square bar linkage, the front handle seat and rear handle seat still are equipped with respectively for the front reset component and rear reset component of front rotation piece and rear rotation piece reset, the front reset component and rear reset component structure are same, the number of rear reset component is at least a group, the rear reset component includes support and at least one elastic piece that acts on support and makes support have the movement trend towards rear rotation piece direction, the rear rotation piece outer periphery is equipped with convex part, when rear handle main part drives rear rotation piece and rotates, the convex part on rear rotation piece pushes support and moves towards the direction away from rear rotation piece, and the elastic piece compresses energy storage, when releasing rear handle main part, the elastic piece releases energy and pushes support and moves towards the direction close to rear rotation piece, and support pushes the convex part on rear rotation piece and makes rear rotation piece return to the original position.

[0005] By adopting the technical scheme, when the rear handle main body drives the rear rotating piece to rotate, the protruding part on the rear rotating piece pushes the bracket to move towards the direction away from the rear rotating piece, and the elastic member is compressed to store energy, when the rear handle main body is released, the elastic member releases energy to push the bracket to move towards the direction close to the rear rotating piece, the bracket pushes the protruding part on the rear rotating piece to make the rear rotating piece return to the original position, since the movement state of the bracket and the elastic member in the rear reset member is linear change when the rear rotating piece rotates, the movement state is stable, the elastic member is not prone to fatigue, the structure is more reliable, and the handle cannot return to the original position, and the user experience can be improved.

[0006] The utility model further sets up, the number of rear reset member is two groups, and symmetrically sets up on rear rotating piece upper and lower two sides, and two brackets close to rear rotating piece one end all with rear rotating piece's outer periphery is inlaid.

[0007] By adopting the technical scheme, two groups of rear reset members are symmetrically arranged on the upper and lower sides of the rear rotating piece, the stress is more uniform and stable, the structure is more reliable, the handle can be rotated in both directions, and bidirectional installation is supported.

[0008] The utility model further sets up, the rear handle seat is equipped with two guide grooves on the side away from the rear handle main body, the bracket is arranged in the corresponding guide groove in the direction close to or away from the rear rotating piece, and the outer periphery of the rear rotating piece is further provided with a limiting convex edge for limiting the bracket in the guide groove.

[0009] By adopting the technical scheme, the bracket is limited in the guide groove to have a fixed movement track, the structure is simple and reliable, and assembly is facilitated.

[0010] The utility model further sets up, the number of elastic member in the rear reset member is two, and the elastic member is spring, two spring positioning grooves are arranged on the bracket, one end of the elastic member is embedded in the corresponding spring positioning groove, and the other end of the elastic member abuts on the inner wall of the guide groove.

[0011] By adopting the technical scheme, the upper and lower brackets are reset by two springs respectively, four point positions are arranged on the outer periphery of the rear rotating piece, the bracket is perfectly inlaid with the rear rotating piece, the force is more uniform and stable, the structure is more reliable, and the handle does not sag or return.

[0012] The utility model further sets up, a limiting protrusion for constituting stroke limiting when the bracket moves towards the direction away from the rear rotating piece is arranged in the guide groove, so that the rotation angle of the rear rotating piece is not greater than 45 DEG.

[0013] By adopting the technical scheme, the rotation angle of the limiting protrusion is not greater than 45°, which is beneficial to pushing the limiting protrusion by the elastic member and the support when the rear handle main body is loosened, and the rear rotating member is returned to the original position.

[0014] The utility model further sets up, be equipped with the give way recess for the limiting protrusion of the support enters.

[0015] By adopting the technical scheme, the volume of the support as a whole can be reduced, thereby reducing the installation space.

[0016] The utility model further sets up, the rear handle seat is connected with rear rotating member through fastener, and the rear handle seat and rear rotating member form a annular groove between, be equipped with the square hole for the square bar passes through on rear rotating member, and the square bar outside be equipped with with the annular groove of the limit flange of mutual engagement.

[0017] By adopting the technical scheme, the rear handle seat, the rear rotating member, the rear handle main body, the square bar and the rear reset component can be assembled, and the assembly operation is very convenient.

[0018] The utility model further sets up, still include interlock mechanism, the interlock mechanism includes lock plate, unlocking lever, anti-lock lever, first reset spring and second reset spring, be equipped with the guide cavity in the rear handle main body, the lock plate is along vertical sliding and is arranged in the guide cavity, still be equipped with the slide hole of intercommunication the guide cavity with the outside of rear handle main body on the rear handle main body, be equipped with the knob of the lock plate that protrudes the slide hole, the knob can along slide hole vertical movement;The unlocking lever passes through the square bar, and the outer periphery of unlocking lever is equipped with first limit part and second limit part respectively, the first reset spring is arranged at the outer periphery of unlocking lever, and the both ends of first reset spring are respectively with the one end of square bar away from lock plate and first limit part abut, make second limit part and the one end of square bar close to lock plate abut;Still be equipped with the guide hole on the rear handle main body along the direction perpendicular to lock plate, be equipped with the lock hole of with the same shaft of guide hole on the rear handle seat, the second reset spring and anti-lock lever are arranged in the guide hole, and the second reset spring acts on anti-lock lever and makes anti-lock lever have the tendency of moving towards close to lock plate direction;Be equipped with first inclined plane and second inclined plane on the lock plate, when the lock plate goes up, first inclined plane and anti-lock lever cooperate and make the end of anti-lock lever be pushed into the lock hole, when unlocking lever moves inwards, act on second inclined plane, make the lock plate go down, anti-lock lever moves inwards under the action of second reset spring and separates from the lock hole.

[0019] By adopting the above technical solution, when the door is locked from the inside, simply push the lock plate upwards to press the end of the deadbolt into the lock hole of the rear handle seat, so that the main body of the rear handle cannot rotate relative to the rear handle seat, thus realizing the deadbolt function; when it is necessary to unlock the door from the outside, simply press the unlocking rod, the lock plate is pushed downwards by the unlocking rod, and after the lock plate moves downwards, the deadbolt is pushed away from the lock hole of the rear handle seat by the second return spring, so that the main body of the rear handle can rotate relative to the rear handle seat, thus realizing the functions of both deadbolt and emergency unlocking, and its emergency unlocking operation is simpler and more reliable.

[0020] The present invention is further configured such that the unlocking rod includes an unlocking spring and a long screw, the long screw passing through the square rod and threadedly connected to the unlocking spring located at the outer end of the square rod.

[0021] By adopting the above technical solution, the two parts use a detachable connection structure, which is more conducive to the initial assembly and the subsequent disassembly and maintenance operations.

[0022] The present invention is further provided that a hidden decorative panel for covering the unlocking rod can be detachably installed on the front handle body.

[0023] By adopting the above technical solution, the hidden decorative panel can conceal the unlocking lever, resulting in a safer and more aesthetically pleasing effect. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0025] Figure 2 This is a cross-sectional view of the entire utility model;

[0026] Figure 3 This is a schematic diagram of the structure of the rear handle assembly of this utility model;

[0027] Figure 4 This is a schematic diagram of the cooperation structure between the rear reset component and the rear rotating component of this utility model.

[0028] In the figure: 1, front handle assembly; 2, rear handle assembly; 3, front handle seat; 4, front handle body; 5, front rotating part; 6, rear handle seat; 7, rear handle body; 8, rear rotating part; 9, square rod; 10, front reset component; 11, rear reset component; 12, protruding part; 13, guide groove; 14, limiting protruding edge; 15, spring positioning groove; 16, limiting protrusion; 17, give way recess; 18, annular groove; 19, square hole; 20, limiting flange; 21, interlocking mechanism; 22, lock plate; 23, unlocking lever; 24, anti-lock lever; 25, first reset spring; 26, second reset spring; 27, guide cavity; 28, sliding hole; 29, pushing block; 30, first limiting part; 31, second limiting part; 32, guide hole; 33, lock hole; 34, first inclined surface; 35, second inclined surface; 36, unlocking bullet; 37, long screw; 38, hidden decorative panel; 39, support; 40, elastic member. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0030] Embodiment: as shown in the accompanying drawings Figures 1-4The illustrated handle structure includes a front handle assembly 1 and a rear handle assembly 2. The front handle assembly 1 includes a front handle base 3 and a front handle body 4 rotatably mounted on the front handle base 3. The front handle body 4 is provided with a front rotating member 5. The rear handle assembly 2 includes a rear handle base 6 and a rear handle body 7 rotatably mounted on the rear handle base 6. The rear handle body 7 is provided with a rear rotating member 8. The front rotating member 5 and the rear rotating member 8 are linked together by a square rod 9. The front handle base 3 and the rear handle base 6 are also respectively provided with a front reset member 10 and a rear reset member 11 for resetting the front rotating member 5 and the rear rotating member 8. The front reset member 10 and the rear reset member 11 have the same structure. The number of rear reset components 11 is at least one set. Each rear reset component 11 includes a bracket 39 and at least one elastic element 40 that acts on the bracket 39 to cause it to move towards the rear rotating component 8. The rear rotating component 8 has a protrusion 12 on its outer periphery. When the rear handle body 7 drives the rear rotating component 8 to rotate, the protrusion 12 on the rear rotating component 8 pushes the bracket 39 to move away from the rear rotating component 8, and the elastic element 40 compresses and stores energy. When the rear handle body 7 is released, the elastic element 40 releases energy to push the bracket 39 to move closer to the rear rotating component 8. The bracket 39 pushes the protrusion 12 on the rear rotating component 8 to cause the rear rotating component 8 to return to its original position. Since the movement of the bracket 39 and the elastic element 40 in the rear reset component 11 is linear when the rear rotating component 8 rotates, the movement is stable, the elastic element 40 is not prone to fatigue, the structure is more reliable, and the situation where the handle cannot return to its original position will not occur, which can significantly improve the user experience.

[0031] The structure and installation method of the front reset component 10 are the same as above.

[0032] As attached Figure 3 As shown, there are two sets of rear reset components 11, symmetrically arranged on the upper and lower sides of the rear rotating member 8. The ends of the two brackets 39 closest to the rear rotating member 8 are in contact with the outer periphery of the rear rotating member 8. The two sets of rear reset components 11 are symmetrically arranged on the upper and lower sides of the rear rotating member 8, resulting in more uniform and stable force distribution. This not only makes the structure more reliable, but also allows for both forward and reverse rotation of the handle, supporting bidirectional installation.

[0033] As attached Figure 3 As shown, the rear handle seat 6 has two guide grooves 13 on the side away from the rear handle body 7. The bracket 39 is slidably disposed in the corresponding guide groove 13 along the direction of approaching or moving away from the rear rotating member 8. The outer periphery of the rear rotating member 8 is also provided with a limiting protrusion 14 for restricting the bracket 39 in the guide groove 13. Restricting the bracket 39 in the guide groove 13 so that it has a fixed movement trajectory is simple, reliable, and easy to assemble.

[0034] As attached Figure 3 and attached Figure 4As shown, the number of elastic members 40 in the rear reset member 11 is two, and the elastic members 40 are springs, the bracket 39 is provided with two spring positioning grooves 15, one end of the elastic member 40 is embedded in the corresponding spring positioning groove 15, and the other end of the elastic member 40 abuts against the inner wall of the guide groove 13. The upper and lower brackets 39 are reset by two springs respectively, four point positions are arranged on the outer periphery of the rear rotating member 8, the bracket 39 perfectly fits the rear rotating member 8, and the force is more uniform and stable, the structure is more reliable, and the phenomenon of handle sagging or not returning is avoided.

[0035] As shown in the accompanying drawings, Figure 3 As shown, the guide groove 13 is provided with a limiting protrusion 16 for limiting the travel of the bracket 39 moving away from the rear rotating member 8, so that the rotation angle of the rear rotating member 8 is not greater than 45°. That is, the rotation angle of the limiting protrusion 16 is not greater than 45°, which is beneficial to the elastic member 40 and the bracket 39 pushing the limiting protrusion 16 when the rear handle body 7 is loosened subsequently, so that the rear rotating member 8 returns to the original position. The rotation angle of the rear rotating member 8 in this embodiment is 45°. That is, when the rear rotating member 8 rotates by 45°, the bracket 39 just abuts against the corresponding limiting protrusion 16 to limit.

[0036] More specifically, the shape of the rear rotating member 8 is that the upper and lower ends are parallel planes, and the left and right ends are circular arc shapes, that is, the protruding part 12 on the rear rotating member 8 is a circular arc shape, and the side of the upper and lower brackets 39 close to the rear rotating member 8 is a shape that fits the upper and lower sides of the rotating member, that is, the middle is a plane, and the two ends are arc surfaces. Thus, in the initial position, the two brackets 39 can stably clamp the rear rotating member 8.

[0037] As shown in the accompanying drawings, Figure 3 As shown, the bracket 39 is provided with a recess 17 for the limiting protrusion 16 to enter. This design can reduce the volume of the bracket 39 as a whole, thereby reducing the installation space.

[0038] As shown in the accompanying drawings, Figure 2 As shown, the rear handle seat 6 is connected with the rear rotating member 8 by a fastener (screw), and an annular groove 18 is formed between the rear handle seat 6 and the rear rotating member 8, the rear rotating member 8 is provided with a square hole 19 for the square rod 9 to pass through, and the square rod 9 is provided with a limiting flange 20 that fits the annular groove 18. This design can realize the assembly of the rear handle seat 6, the rear rotating member 8, the rear handle body 7, the square rod 9 and the rear reset member 11, and the assembly operation is very convenient.

[0039] As shown in the accompanying drawings, Figure 2As shown, the interlocking mechanism 21 comprises a lock plate 22, an unlocking lever 23, a reverse locking lever 24, a first return spring 25 and a second return spring 26. A guide cavity 27 is arranged in the rear handle body 7. The lock plate 22 is vertically slidably arranged in the guide cavity 27. A sliding hole 28 is arranged in the rear handle body 7 and communicates with the guide cavity 27 and the outside of the rear handle body 7. A pushing block 29 is arranged on the lock plate 22 and extends out of the sliding hole 28. The pushing block 29 is vertically movable along the sliding hole 28. The unlocking lever 23 penetrates the square rod 9. A first limiting portion 30 and a second limiting portion 31 are respectively arranged on the outer periphery of the unlocking lever 23. The first return spring 25 is arranged on the outer periphery of the unlocking lever 23. The two ends of the first return spring 25 respectively abut against the end of the square rod 9 away from the lock plate 22 and the first limiting portion 30, so that the second limiting portion 31 abuts against the end of the square rod 9 close to the lock plate 22. A guide hole 32 is arranged on the rear handle body 7 and is perpendicular to the lock plate 22. A lock hole 33 with the same axis as the guide hole 32 is arranged on the rear handle seat 6. The second return spring 26 and the reverse locking lever 24 are arranged in the guide hole 32. The second return spring 26 acts on the reverse locking lever 24 to make the reverse locking lever 24 have a tendency to move towards the lock plate 22. A first inclined surface 34 and a second inclined surface 35 are arranged on the lock plate 22. When the lock plate 22 moves upwards, the first inclined surface 34 cooperates with the reverse locking lever 24 to make the end of the reverse locking lever 24 be pushed into the lock hole 33. When the unlocking lever 23 moves inwards, it acts on the second inclined surface 35 to make the lock plate 22 move downwards. The reverse locking lever 24 moves inwards under the action of the second return spring 26 and is separated from the lock hole 33. When the door is reverse-locked, it is only needed to push the lock plate 22 to move upwards, so that the end of the reverse locking lever 24 is pressed into the lock hole 33 of the rear handle seat 6, so that the rear handle body 7 cannot rotate relative to the rear handle seat 6, thereby realizing the reverse-locking function. When emergency unlocking is needed outside the door, it is only needed to press the unlocking lever 23, so that the lock plate 22 is pushed downwards by the unlocking lever 23. After the lock plate 22 moves downwards, the reverse locking lever 24 is pushed away from the lock hole 33 of the rear handle seat 6 by the second return spring 26, so that the rear handle body 7 can rotate relative to the rear handle seat 6, thereby realizing the function that both reverse-locking and emergency unlocking can be realized. The emergency unlocking operation is more simple and reliable.

[0040] As shown in the accompanying drawings, Figure 2 The unlocking lever 23 comprises an unlocking bullet 36 and a long screw 37. The screw head of the long screw 37 serves as the first limiting portion 30. The second limiting portion 31 is arranged on the outer periphery of the unlocking bullet 36. The long screw 37 penetrates the square rod 9 and is threadedly connected with the unlocking bullet 36 arranged on the outer end of the square rod 9. The end of the unlocking lever 23 extending into the front handle body 4 can be provided with a gasket for supporting the first return spring 25. The two are detachably connected, which is more conducive to the assembly in the early stage and the disassembly and maintenance operation in the later stage.

[0041] As shown in the accompanying drawings, Figure 2As shown, the front handle body 4 is detachably mounted with a hidden decorative panel 38 for covering the unlocking rod 23. The hidden decorative panel 38 can hide the unlocking rod 23, having a more secure and aesthetic effect. More specifically, a magnet can be arranged on the front handle body 4, and the hidden decorative panel is made of metal material that can be attracted by the magnet, and the hidden decorative panel 38 is attracted and fixed on the front handle body 4 by the magnet.

Claims

1. A handle structure comprising a front handle assembly (1) and a rear handle assembly (2), the front handle assembly (1) comprising a front handle base (3) and a front handle body (4) rotatably arranged on the front handle base (3), the front handle body (4) being provided with a front rotating member (5), the rear handle assembly (2) comprising a rear handle base (6) and a rear handle body (7) rotatably arranged on the rear handle base (6), the rear handle body (7) being provided with a rear rotating member (8), the front rotating member (5) and the rear rotating member (8) being connected by a square bar (9); characterized in that: The front handle seat (3) and the rear handle seat (6) are further respectively provided with a front reset component (10) and a rear reset component (11) for resetting the front rotating member (5) and the rear rotating member (8), the front reset component (10) and the rear reset component (11) are the same structure, the number of the rear reset component (11) is at least one set, the rear reset component (11) comprises a bracket (39) and at least one elastic member (40) acting on the bracket (39) to make the bracket (39) have a movement trend towards the rear rotating member (8), and the rear rotating member (8) is provided with a protruding portion (12) on the outer periphery; when the rear handle body (7) drives the rear rotating member (8) to rotate, the protruding portion (12) on the rear rotating member (8) pushes the bracket (39) to move away from the rear rotating member (8), and the elastic member (40) is compressed to store energy; when the rear handle body (7) is released, the elastic member (40) releases energy to push the bracket (39) to move towards the rear rotating member (8), and the bracket (39) pushes the protruding portion (12) on the rear rotating member (8) to make the rear rotating member (8) return to the original position.

2. A handle construction according to claim 1, wherein: The number of the rear reset component (11) is two sets, and the two sets are symmetrically arranged on the upper and lower sides of the rear rotating member (8), and the two brackets (39) are close to the outer periphery of the rear rotating member (8).

3. A handle construction according to claim 2, wherein: The rear handle seat (6) is provided with two guide grooves (13) away from the rear handle body (7), the bracket (39) is arranged in the corresponding guide groove (13) and slides towards or away from the rear rotating member (8), and the outer periphery of the rear rotating member (8) is further provided with a limiting convex edge (14) for limiting the bracket (39) in the guide groove (13).

4. A handle construction according to claim 3, wherein: The number of the elastic member (40) in the rear reset component (11) is two, and the elastic member (40) is a spring, the bracket (39) is provided with two spring positioning grooves (15), one end of the elastic member (40) is embedded in the corresponding spring positioning groove (15), and the other end of the elastic member (40) abuts against the inner wall of the guide groove (13).

5. A handle construction according to claim 4, wherein: The guide groove (13) is provided with a limiting protrusion (16) for limiting the stroke of the bracket (39) moving away from the rear rotating member (8), so that the rotation angle of the rear rotating member (8) is not greater than 45°.

6. A handle construction according to claim 5, wherein: The bracket (39) is provided with a recess (17) for the limiting protrusion (16) to enter.

7. A handle construction according to claim 3 wherein: The rear handle seat (6) is connected with the rear rotating member (8) through a fastener, and an annular groove (18) is formed between the rear handle seat (6) and the rear rotating member (8), the rear rotating member (8) is provided with a square hole (19) for the square rod (9) to pass through, and the square rod (9) is provided with a limiting flange (20) matched with the annular groove (18) on the outer side.

8. The handle structure of claim 1, wherein: The lock further comprises an interlocking mechanism (21), which comprises a lock plate (22), an unlocking lever (23), a reverse locking lever (24), a first return spring (25) and a second return spring (26). A guide cavity (27) is arranged in the rear handle body (7). The lock plate (22) is arranged in the guide cavity (27) in a vertical sliding manner. A sliding hole (28) is arranged on the rear handle body (7) and communicates with the guide cavity (27) and the outside of the rear handle body (7). A pushing block (29) is arranged on the lock plate (22) and extends out of the sliding hole (28). The pushing block (29) can move vertically along the sliding hole (28). The unlocking lever (23) penetrates the square rod (9). The outer periphery of the unlocking lever (23) is respectively provided with a first limiting portion (30) and a second limiting portion (31). The first return spring (25) is arranged on the outer periphery of the unlocking lever (23). The two ends of the first return spring (25) respectively abut against the end of the square rod (9) away from the lock plate (22) and the first limiting portion (30), so that the second limiting portion (31) abuts against the end of the square rod (9) close to the lock plate (22). A guide hole (32) is arranged on the rear handle body (7) in a direction perpendicular to the lock plate (22). A lock hole (33) with the same axis as the guide hole (32) is arranged on the rear handle seat (6). The second return spring (26) and the reverse locking lever (24) are arranged in the guide hole (32). The second return spring (26) acts on the reverse locking lever (24) to make the reverse locking lever (24) have a tendency to move towards the direction close to the lock plate (22). The lock plate (22) is provided with a first inclined surface (34) and a second inclined surface (35). When the lock plate (22) moves upwards, the first inclined surface (34) cooperates with the reverse locking lever (24) to make the end of the reverse locking lever (24) be pushed into the lock hole (33). When the unlocking lever (23) moves inwards, it acts on the second inclined surface (35) to make the lock plate (22) move downwards. The reverse locking lever (24) moves inwards under the action of the second return spring (26) and is separated from the lock hole (33).

9. A handle construction according to claim 8, wherein: The unlocking lever (23) comprises an unlocking bullet (36) and a long screw (37). The long screw (37) penetrates the square rod (9) and is threadedly connected with the unlocking bullet (36) arranged at the outer end of the square rod (9).

10. A handle construction according to claim 8, wherein: The front handle body (4) is further detachably provided with a hidden decorative panel (38) for covering the unlocking lever (23).

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