Intelligent center control screen anti-disassembly structure
By introducing an anti-tamper alarm mechanism and a stable installation mechanism into the intelligent central control screen, the problems of anti-tamper alarm and unstable installation of the central control screen body and power box are solved, achieving the effect of double-layer anti-tamper alarm and stable installation, and improving the aesthetics and safety of the assembly.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- XIAMEN DNAKE INTELLIGENT TECH CO LTD
- Filing Date
- 2025-03-11
- Publication Date
- 2026-04-10
AI Technical Summary
Existing anti-tamper structures for smart home control screens lack anti-tamper alarm functions for both the control screen itself and the power supply box. Furthermore, the anti-tamper installation between the control screen itself and the back bracket is ineffective and prone to loosening.
The device employs an anti-tamper alarm mechanism and a stable installation mechanism. The anti-tamper alarm mechanism uses a sliding cover buckle and a warning device to provide anti-tamper alarm functionality for the central control screen body and the power box. The stable installation mechanism uses arc-shaped clips and slots to ensure the stable installation of the central control screen body and the back bracket body.
It achieves a dual-layer anti-tamper alarm and fixing effect between the central control screen body and the power box, reduces the space occupation of the anti-tamper structure, makes assembly convenient and aesthetically pleasing, and avoids loosening.
Smart Images

Figure CN224111407U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to intelligent house technical field, concretely is a kind of intelligent central control screen anti-disassembly structure. BACKGROUND
[0002] "Smart home" is also called intelligent house, in popular terms, it utilizes advanced computer, embedded system and network communication technology, connects the various devices (such as lighting system, environmental control, security system, network household appliances) in home together through home network, smart home will let user have more convenient means to manage home equipment, can also execute scene operation, so that multiple devices form linkage, intelligent central control screen is a kind of smart home, in order to meet market needs, now need a kind of intelligent central control screen anti-disassembly structure.
[0003] The existing intelligent central control screen, power box and display screen are separate, and the middle power connection relies on the row of pins, if the display screen and power box are separated, power is cut off, and the anti-disassembly early warning function is not triggered, and some projects are forced to have anti-disassembly function, which cannot meet the needs of projects and guests, the anti-disassembly structure usually does not have the function of anti-disassembly alarm for the central control screen body and the power box when in use, which increases the space occupancy rate of the anti-disassembly structure, and the assembly is not convenient and beautiful. UTILITY MODEL CONTENTS
[0004] The utility model aims at providing a kind of intelligent central control screen anti-disassembly structure to solve the problem that anti-disassembly structure usually does not have the function of anti-disassembly alarm for the central control screen body and the power box when in use in the above background art, and the anti-disassembly installation effect between the central control screen body and the back hanging frame body is not good enough.
[0005] In order to achieve the above object, the utility model provides the following technical scheme: A kind of intelligent central control screen anti-disassembly structure, the one side of the central control screen body is provided with back hanging frame body, the surface of the back hanging frame body is equipped with power box, the one side of the central control screen body is provided with PCB mainboard, the one side of the central control screen body is provided with lower cover, the surface of the back hanging frame body is all screw thread connection with mounting screw, the inner wall of the central control screen body is all equipped with mounting screw hole, one end of the mounting screw is penetrated mounting screw hole and is screw fastened with the inner wall of mounting screw hole, the inner wall of the central control screen body is equipped with aluminium middle frame, the inner wall of the aluminium middle frame is equipped with fixed structure, the inner wall of the back hanging frame body is equipped with back hanging frame anti-disassembly buckle, one end of the back hanging frame anti-disassembly buckle extends to the inside of central control screen body, the inside of the central control screen body is provided with anti-disassembly alarm mechanism, the inside of the anti-disassembly alarm mechanism includes spring fixed sheet, anti-disassembly switch board, early warning device, spring body, sliding cover buckle and sliding cover body, the inner wall of the mounting screw hole and the surface of the mounting screw are provided with firm installation mechanism, the inside of the firm installation mechanism includes telescopic spring, groove, arc type clamping piece and arc type clamping groove.
[0006] Preferably, the PCB mainboard and the lower cover are located between the central control screen body and the back hanging frame body respectively, the surface of the PCB mainboard is screw thread connected with cross countersunk machine tooth screw, one end of the cross countersunk machine tooth screw is penetrated the PCB mainboard and is screw fastened with the inner wall of the central control screen body.
[0007] Preferably, the inner wall of the back hanging frame body is equipped with the anti-disassembly switch board, the surface of the anti-disassembly switch board and the back hanging frame anti-disassembly buckle are mutually clamped and matched, the surface of the anti-disassembly switch board and the inner wall of the fixed structure are mutually clamped and matched, the inner wall of the central control screen body is equipped with the spring fixed sheet, the surface of the spring fixed sheet is equipped with the spring body, the inside of the central control screen body is provided with the sliding cover buckle, the sliding cover buckle and the inner wall of the central control screen body are mutually sliding matched, the surface of the anti-disassembly switch board and the sliding cover buckle are mutually clamped and matched.
[0008] Preferably, the surface of the central control screen body is provided with the sliding cover body, one end of the sliding cover body extends to the inside of the central control screen body and is fixed with the surface of the sliding cover buckle, the inner wall of the central control screen body is equipped with groove, and the surface of the groove and the sliding cover body are mutually sliding matched, the surface of the anti-disassembly switch board is equipped with the early warning device, the early warning device and the sliding cover buckle are mutually matched, the surface of the sliding cover buckle side and the surface of the spring body are fixed.
[0009] Preferably, the inner wall of the central control screen body is all equipped with the groove, the inside of the groove is provided with the arc type clamping piece, the arc type clamping piece and the inner wall of the groove are mutually sliding matched.
[0010] Preferably, the surface of the mounting screw is provided with an arc-shaped clamping groove, the arc-shaped clamping groove and the surface of the arc-shaped clamping piece are matched with each other, the inner wall of the groove is provided with an extension spring, and one end of the extension spring is fixed to the surface of the arc-shaped clamping piece.
[0011] Compared with the prior art, the intelligent central control screen anti-disassembly structure has the advantages that: the anti-disassembly structure can play the dual roles of installation and fixation and anti-disassembly warning between the central control screen body and the power supply box, has a small space occupation rate, is easy to assemble and has a good appearance, can stably assemble the central control screen body and the back hanging rack body together during use, and avoids accidental loosening during use.
[0012] 1. When the user wants to disassemble the central control screen body and the power supply box, the user slides the sliding cover body on the surface of the central control screen body, so that the sliding cover body slides in the slot body, the sliding cover buckle slides in the central control screen body, the spring body on the surface of the spring fixing piece is pressed by the sliding cover buckle, the sliding cover buckle is away from the surface of the warning device on the surface of the anti-disassembly switch plate, and the central control screen body and the power supply box are disassembled.
[0013] 2. When the user tightens the mounting screw hole, the back hanging rack body is mounted on the surface of the central control screen body under the cooperation of the mounting screw hole and the mounting screw, the arc-shaped clamping piece is driven to move under the elastic force of the extension spring in the groove, the arc-shaped clamping piece automatically clamps into the arc-shaped clamping groove, the back hanging rack body is mounted on the surface of the central control screen body under the clamping cooperation of the arc-shaped clamping piece and the arc-shaped clamping groove, the central control screen body, the back hanging rack body and the power supply box are more firmly mounted, and the anti-disassembly structure can stably assemble the central control screen body and the back hanging rack body together during use, and accidental loosening during use is avoided. BRIEF DESCRIPTION OF DRAWINGS
[0014] Figure 1 It is a three-dimensional structure schematic view of the utility model;
[0015] Figure 2The utility model discloses a front view exploded structure schematic diagram of the utility model discloses a rear view exploded structure schematic diagram of the utility model discloses a front view section enlarged structure schematic diagram of the utility model discloses a top view section enlarged structure schematic diagram of the utility model discloses a
[0016] Figure 3 The utility model discloses a rear view exploded structure schematic diagram of the utility model discloses a front view section enlarged structure schematic diagram of the utility model discloses a top view section enlarged structure schematic diagram of the utility model discloses a
[0017] Figure 4 The utility model discloses a front view section enlarged structure schematic diagram of the utility model discloses a top view section enlarged structure schematic diagram of the utility model discloses a
[0018] Figure 5 The utility model discloses a front view section enlarged structure schematic diagram of the utility model discloses a top view section enlarged structure schematic diagram of the utility model discloses a
[0019] Figure 6 The utility model discloses a front view section enlarged structure schematic diagram of the utility model discloses a top view section enlarged structure schematic diagram of the utility model discloses a
[0020] Figure 7 The utility model discloses a front view section enlarged structure schematic diagram of the utility model discloses a top view section enlarged structure schematic diagram of the utility model discloses a
[0021] Figure 8 The utility model discloses a front view section enlarged structure schematic diagram of the utility model discloses a top view section enlarged structure schematic diagram of the utility model discloses a
[0022] Figure 9 The utility model discloses a front view section enlarged structure schematic diagram of the utility model discloses a top view section enlarged structure schematic diagram of the utility model discloses a Figure 4 The utility model discloses a front view section enlarged structure schematic diagram of the utility model discloses a top view section enlarged structure schematic diagram of the utility model discloses a
[0023] Figure 10 The utility model discloses a front view section enlarged structure schematic diagram of the utility model discloses a top view section enlarged structure schematic diagram of the utility model discloses a Figure 5 The utility model discloses a front view section enlarged structure schematic diagram of the utility model discloses a top view section enlarged structure schematic diagram of the utility model discloses a
[0024] In the drawing: 1, central control screen body;101, power supply box;102, back hanging frame body;103, PCB mainboard;104, lower cover;105, cross countersunk head machine screw;106, fixed structure;107, aluminum middle frame;108, mounting screw hole;109, mounting screw;110, back hanging frame anti-disassembly buckle;2, anti-disassembly alarm mechanism;21, spring fixed sheet;22, anti-disassembly switch board;23, early warning device;24, spring body;25, sliding cover buckle;26, sliding cover body;3, firm installation mechanism;31, extension spring;32, recess;33, arc type clamping piece;34, arc type clamping groove. DETAILED DESCRIPTION
[0025] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only part of the embodiments of the present utility model, rather than all the embodiments. In addition, the terms "first", "second", "third", "upper", "lower", "left", "right" and the like are only used for the purpose of description, and cannot be understood as indicating or implying relative importance. Meanwhile, in the description of the present utility model, unless explicitly specified and limited, the terms "connected" and "linked" should be understood in a broad sense, for example, can be fixedly connected, or can be detachably connected, or integrally connected; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium. Based on the embodiments in the present utility model, all other embodiments obtained by those skilled in the art without making creative efforts fall within the scope of protection of the present utility model.
[0026] The structure of the intelligent central control screen anti-disassembly structure provided by the present utility model is shown in Figure 2 and Figure 3 , which comprises a central control screen body 1, the central control screen body 1 is provided with a back hanging rack body 102 on one side, the surface of the back hanging rack body 102 is provided with a power box 101, the central control screen body 1 is provided with a PCB mainboard 103 on one side, the central control screen body 1 is provided with a lower cover 104 on one side, the PCB mainboard 103 and the lower cover 104 are respectively located between the central control screen body 1 and the back hanging rack body 102, the surface of the PCB mainboard 103 is all screw-connected with a cross countersunk machine tooth screw 105, one end of the cross countersunk machine tooth screw 105 penetrates through the PCB mainboard 103 and is screw-fastened with the inner wall of the central control screen body 1, the surface of the back hanging rack body 102 is all screw-connected with a mounting screw 109, the inner wall of the central control screen body 1 is all provided with a mounting screw hole 108, one end of the mounting screw 109 penetrates through the mounting screw hole 108 and is screw-fastened with the inner wall of the mounting screw hole 108, the inner wall of the central control screen body 1 is provided with an aluminum middle frame 107, the inner wall of the aluminum middle frame 107 is provided with a fixing structure 106, the inner wall of the back hanging rack body 102 is provided with a back hanging rack anti-disassembly buckle 110, one end of the back hanging rack anti-disassembly buckle 110 extends to the inside of the central control screen body 1.
[0027] Further, as shown in Figure 4 and Figure 9As shown, the inside of the central control screen body 1 is provided with an anti-disassembly alarm mechanism 2, the inside of the anti-disassembly alarm mechanism 2 contains spring fixing sheet 21, anti-disassembly switch plate 22, early warning device 23, spring body 24, slide cover buckle 25 and slide cover body 26, the inner wall of the back hanging rack body 102 is provided with the anti-disassembly switch plate 22, the surface of the anti-disassembly switch plate 22 and the surface of the back hanging rack anti-disassembly buckle 110 are mutually clamped and matched, the surface of the anti-disassembly switch plate 22 and the inner wall of the fixed structure 106 are mutually clamped and matched, the inner wall of the central control screen body 1 is provided with the spring fixing sheet 21, the surface of the spring fixing sheet 21 is provided with the spring body 24, the inside of the central control screen body 1 is provided with the slide cover buckle 25, the slide cover buckle 25 and the inner wall of the central control screen body 1 are mutually slidably matched, the surface of the anti-disassembly switch plate 22 and the surface of the slide cover buckle 25 are mutually clamped and matched, the surface of the central control screen body 1 is provided with the slide cover body 26, one end of the slide cover body 26 extends to the inside of the central control screen body 1 and is fixed with the surface of the slide cover buckle 25, the inner wall of the central control screen body 1 is provided with a groove, and the groove and the surface of the slide cover body 26 are mutually slidably matched, the surface of the anti-disassembly switch plate 22 is provided with the early warning device 23, the early warning device 23 and the slide cover buckle 25 are mutually matched, and the surface of one side of the slide cover buckle 25 is fixed with the surface of the spring body 24.
[0028] When the central control screen body 1 and the power box 101 are combined together, the anti-disassembly switch plate 22 is buckled on the slide cover buckle 25 and cannot be disassembled, only when the slide cover body 26 is slid, the anti-disassembly switch plate 22 and the slide cover buckle 25 can be disassembled, the anti-disassembly switch plate 22 is fixed in the fixed position in the aluminum frame 107, when the user wants to disassemble the central control screen body 1 and the power box 101, the user slides the slide cover body 26 on the surface of the central control screen body 1, so that the slide cover body 26 slides in the groove, at this time, the slide cover body 26 drives the slide cover buckle 25 to slide in the inside of the central control screen body 1, at this time, the slide cover buckle 25 extrudes the spring body 24 on the surface of the spring fixing sheet 21, so that the slide cover buckle 25 is away from the surface of the early warning device 23 on the surface of the anti-disassembly switch plate 22, thereby disassembling the central control screen body 1 and the power box 101, when the user releases the slide cover body 26, at this time, the spring body 24 on the surface of the spring fixing sheet 21 drives the slide cover buckle 25 to reset under the action of the elastic force, so that the slide cover buckle 25 is automatically buckled to the surface of the anti-disassembly switch plate 22, the central control screen body 1 and the power box 101 are not easy to disassemble through the anti-disassembly switch plate 22 hooking the slide cover buckle 25, when the slide cover buckle 25 is away from the surface of the anti-disassembly switch plate 22, the early warning device 23 is touched to start the early warning function, the user can receive the early warning information from the central control screen to know that someone touches the host equipment, so as to realize the function of the anti-disassembly structure for the anti-disassembly alarm of the central control screen body 1 and the power box 101.
[0029] Further, as shown in FIG. 8, Figure 5 and Figure 10As shown, the inner wall of the mounting screw hole 108 and the surface of the mounting screw 109 are provided with a firm mounting mechanism 3, the inside of the firm mounting mechanism 3 contains an extension spring 31, a groove 32, an arc-shaped clamping piece 33 and an arc-shaped clamping groove 34, the inner wall of the central control screen body 1 is provided with the groove 32, the inside of the groove 32 is provided with the arc-shaped clamping piece 33, the arc-shaped clamping piece 33 and the inner wall of the groove 32 are slidably connected, the surface of the mounting screw 109 is provided with the arc-shaped clamping groove 34, the arc-shaped clamping groove 34 and the surface of the arc-shaped clamping piece 33 are clampedly connected, the inner wall of the groove 32 is provided with the extension spring 31, one end of the extension spring 31 is fixedly connected with the surface of the arc-shaped clamping piece 33.
[0030] In implementation, when the user tightens the mounting screw hole 108, the back hanging rack body 102 is installed on the surface of the central control screen body 1 under the cooperation of the mounting screw hole 108 and the mounting screw 109, the arc-shaped clamping piece 33 is driven to move under the elastic force of the extension spring 31 in the groove 32, so that the arc-shaped clamping piece 33 slides in the groove 32, at this time, the arc-shaped clamping piece 33 is automatically clamped into the arc-shaped clamping groove 34, the back hanging rack body 102 is installed on the surface of the central control screen body 1 under the clamping cooperation of the arc-shaped clamping piece 33 and the arc-shaped clamping groove 34, so that the central control screen body 1, the back hanging rack body 102 and the power box 101 are more firmly installed, and are not easy to be loose, so as to realize the function of the anti-disassembly structure for the anti-disassembly installation between the central control screen body 1 and the back hanging rack body 102.
[0031] Working principle: in use, first of all, the central control screen body 1 is placed in the specified position, when the central control screen body 1 and the power box 101 are combined together, the anti-disassembly switch plate 22 is buckled on the slide cover buckle 25 and cannot be disassembled, only when the slide cover body 26 is slid, the anti-disassembly switch plate 22 and the slide cover buckle 25 can be disassembled, the anti-disassembly switch plate 22 is fixed in the fixed position in the aluminum frame 107, when the user wants to disassemble the central control screen body 1 and the power box 101, the user slides the slide cover body 26 on the surface of the central control screen body 1, so that the slide cover body 26 slides in the groove, at this time, the slide cover body 26 drives the slide cover buckle 25 to slide in the central control screen body 1, at this time, the slide cover buckle 25 extrudes the spring body 24 on the surface of the spring fixing piece 21, so that the slide cover buckle 25 is away from the surface of the early warning device 23 on the surface of the anti-disassembly switch plate 22, thereby disassembling the central control screen body 1 and the power box 101, when the user releases the slide cover body 26, at this time, the spring body 24 on the surface of the spring fixing piece 21 drives the slide cover buckle 25 to reset, so that the slide cover buckle 25 is automatically buckled to the surface of the anti-disassembly switch plate 22, the central control screen body 1 and the power box 101 are not easy to disassemble through the anti-disassembly switch plate 22 hooking the slide cover buckle 25, when the slide cover buckle 25 is away from the surface of the anti-disassembly switch plate 22, the early warning function is started by touching the early warning device 23, the user can receive the early warning information from the central control screen to know that someone touches the host device, so as to realize the function of the anti-disassembly structure for the central control screen body 1 and the power box 101, thereby the anti-disassembly structure can realize the dual functions of installation and anti-disassembly early warning between the central control screen body 1 and the power box 101, so that the space occupation rate of the anti-disassembly structure is small, the assembly is convenient and beautiful.
[0032] Subsequently, when the user tightens the installation screw hole 108, the back hanging rack body 102 is installed on the surface of the central control screen body 1 under the cooperation of the installation screw hole 108 and the installation screw 109, the arc-shaped clamping piece 33 is driven to move under the elastic force of the extension spring 31 in the groove 32, so that the arc-shaped clamping piece 33 slides in the groove 32, at this time, the arc-shaped clamping piece 33 is automatically buckled in the arc-shaped clamping groove 34, the back hanging rack body 102 is installed on the surface of the central control screen body 1 under the cooperation of the arc-shaped clamping piece 33 and the arc-shaped clamping groove 34, so that the central control screen body 1, the back hanging rack body 102 and the power box 101 are more firmly installed, and are not easy to be loose, so as to realize the function of the anti-disassembly structure for the central control screen body 1 and the back hanging rack body 102, thereby the anti-disassembly structure can stably assemble the central control screen body 1 and the back hanging rack body 102 together when in use, avoiding the accidental loosening of the anti-disassembly structure during use, and finally completing the use of the anti-disassembly structure.
[0033] It is apparent for a person skilled in the art that the present application is not restricted to the details of the above exemplary embodiments, but that it can be implemented in other concrete forms without departing from the spirit or the essential characteristics of the present application. Therefore, the embodiments should be considered as exemplary only, and not limiting, the scope of the present application being defined by the appended claims rather than the above description, and all changes coming within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference signs in the claims should not be construed as limiting the claims concerned.
Claims
1. An intelligent central control screen anti-disassembly structure, comprising a central control screen body (1), characterized in that: The side of the central control screen body (1) is provided with a back hanging rack body (102), the surface of the back hanging rack body (102) is provided with a power box (101), one side of the central control screen body (1) is provided with a PCB mainboard (103), one side of the central control screen body (1) is provided with a lower cover (104), the surface of the back hanging rack body (102) is threadedly connected with a mounting screw (109), the inner wall of the central control screen body (1) is provided with a mounting screw hole (108), one end of the mounting screw (109) penetrates through the mounting screw hole (108) and is threadedly fastened with the inner wall of the mounting screw hole (108), the inner wall of the central control screen body (1) is provided with an aluminum middle frame (107), the inner wall of the aluminum middle frame (107) is provided with a fixing structure (106), the inner wall of the back hanging rack body (102) is provided with a back hanging rack anti-disassembly buckle (110), one end of the back hanging rack anti-disassembly buckle (110) extends to the inside of the central control screen body (1), the inside of the central control screen body (1) is provided with an anti-disassembly alarm mechanism (2), the inside of the anti-disassembly alarm mechanism (2) comprises a spring fixing piece (21), an anti-disassembly switch plate (22), a pre-warning device (23), a spring body (24), a sliding cover buckle (25) and a sliding cover body (26), the inner wall of the mounting screw hole (108) and the surface of the mounting screw (109) are provided with a stable mounting mechanism (3), the inside of the stable mounting mechanism (3) comprises a telescopic spring (31), a groove (32), an arc-shaped clamping piece (33) and an arc-shaped clamping groove (34).
2. The anti-disassembly structure of the intelligent center control screen according to claim 1, characterized in that: The PCB mainboard (103) and the lower cover (104) are located between the central control screen body (1) and the back hanging rack body (102), respectively, the surface of the PCB mainboard (103) is threadedly connected with a cross countersunk machine tooth screw (105), one end of the cross countersunk machine tooth screw (105) penetrates through the PCB mainboard (103) and is threadedly fastened with the inner wall of the central control screen body (1).
3. The anti-disassembly structure of the intelligent center control screen according to claim 1, characterized in that: The inner wall of the back hanging rack body (102) is provided with an anti-disassembly switch plate (22), the surface of the anti-disassembly switch plate (22) and the back hanging rack anti-disassembly buckle (110) are mutually clamped and matched, the surface of the anti-disassembly switch plate (22) and the inner wall of the fixing structure (106) are mutually clamped and matched, the inner wall of the central control screen body (1) is provided with a spring fixing piece (21), the surface of the spring fixing piece (21) is provided with a spring body (24), the inside of the central control screen body (1) is provided with a sliding cover buckle (25), the sliding cover buckle (25) and the inner wall of the central control screen body (1) are mutually slidably matched, the surfaces of the anti-disassembly switch plate (22) and the sliding cover buckle (25) are mutually clamped and matched.
4. The anti-disassembly structure of the intelligent center control screen according to claim 1, characterized in that: The surface of the central control screen body (1) is provided with a sliding cover body (26), one end of the sliding cover body (26) extends to the inside of the central control screen body (1) and is fixed with the surface of the sliding cover buckle (25), the inner wall of the central control screen body (1) is provided with a groove, and the surface of the groove and the surface of the sliding cover body (26) are slidably matched, the surface of the anti-disassembly switch plate (22) is provided with a early warning device (23), the early warning device (23) and the sliding cover buckle (25) are matched with each other, and the surface of one side of the sliding cover buckle (25) is fixed with the surface of the spring body (24).
5. The anti-disassembly structure of the intelligent center control screen according to claim 1, characterized in that: The inner wall of the central control screen body (1) is provided with a groove (32), and the inside of the groove (32) is provided with an arc-shaped clamping piece (33).
6. The anti-disassembly structure of the intelligent center control screen according to claim 1, characterized in that: The surface of the mounting screw (109) is provided with an arc-shaped clamping groove (34), the arc-shaped clamping groove (34) and the surface of the arc-shaped clamping piece (33) are matched, the inner wall of the groove (32) is provided with a telescopic spring (31), and one end of the telescopic spring (31) is fixed with the surface of the arc-shaped clamping piece (33).