Computer keyboard with dustproof function

Abstract

The computer keyboard with the dustproof function comprises a keyboard body, buttons are fixedly installed on the top of the keyboard body, movable sliding grooves are formed in the two sides of the keyboard body in the length direction of the keyboard body, one end of each movable sliding groove penetrates through the keyboard body, and positioning grooves are formed in the upper portion and the lower portion of the other end of each movable sliding groove. The movable sliding groove is movably connected with a dustproof cover, movable sliding strips are fixedly connected to the two sides of the interior of the dustproof cover and matched with the movable sliding groove, and limiting units are arranged in the two sides, close to the installation end of the dustproof cover, of the movable sliding strips. The computer keyboard with the dustproof function solves the problems that an existing computer keyboard with the dustproof function does not protect the surface of the keyboard, the keyboard is polluted and damaged, and meanwhile frequent cleaning is needed.

Description

Technical Field

[0001] The utility model belongs to the technical field of computer equipment, and in particular relates to a computer keyboard with a dustproof function. Background Art

[0002] With the development of the times and the advancement of technology, computers have gradually become one of the indispensable tools for people's daily office work. Computer keyboards are necessary input devices when using computers, so their protection and cleaning are essential.

[0003] Keyboards are usually cleaned by tapping, shaking, blowing with a hair dryer, wiping with detergent, or disassembling and installing. These methods not only affect the stability of the keyboard structure, but also waste labor costs. If no protective measures are applied to the surface of existing computer keyboards, dust, lint and other debris will gradually accumulate on the keyboard surface and in the gaps, which not only reduces the aesthetics of the keyboard, but also may cause a short circuit in the electronic board inside the keyboard, damaging the keyboard. Utility Model Content

[0004] The utility model aims to provide a computer keyboard with a dustproof function, which solves the problem that the existing computer keyboard with a dustproof function does not protect the keyboard surface, causing the keyboard to be polluted and damaged, and requiring frequent cleaning.

[0005] The technical scheme adopted by the utility model is that the computer keyboard with dustproof function comprises a keyboard body, a button is fixedly installed on the top of the keyboard body, movable slide grooves are opened on both sides of the keyboard body along the length direction, one end of the movable slide groove passes through the keyboard body, and positioning grooves are opened on the upper and lower ends of the other end of the movable slide groove, the movable slide groove is movably connected with a dustproof cover, movable slide bars are fixedly connected to the inner sides of the dustproof cover, the movable slide bars are adapted to the movable slide groove, and limited position units are opened on both sides of the movable slide bar near the installation end of the dustproof cover.

[0006] The utility model is also characterized in that:

[0007] A cleaning sponge is fixedly connected to the top of the inside of the dust cover.

[0008] A tray is fixedly mounted on one side of the keyboard body perpendicular to the movable slide slot, and a plurality of data interfaces are opened on the other side of the keyboard body perpendicular to the movable slide slot.

[0009] Two first anti-skid pads are installed at the bottom of the keyboard body near the tray, and the two first anti-skid pads are symmetrically distributed.

[0010] Each limiting unit includes a lifting slot, and limiting slide slots are provided on both sides of the inner wall of each lifting slot. A spring is fixedly connected to the bottom of each lifting slot, and a positioning stop pin is fixedly connected to the other end of each spring. The positioning stop pin is adapted to the positioning slot, and limiting sliders are fixedly connected to both sides of each positioning stop pin close to the spring. The limiting slider is adapted to the limiting slide slot, and the limiting slider is slidably connected to the limiting slide slot.

[0011] Two adjustment components are provided at the bottom of the keyboard body near the data interface, and the two adjustment components are symmetrically distributed. The adjustment components include a first auxiliary groove, and the same rotating shaft is fixedly connected to both sides of the first auxiliary groove. A connecting piece is fixedly connected to the top of the first auxiliary groove, and the connecting piece is sleeved on the outside of the rotating shaft. The same support plate is movably connected to both ends of the rotating shaft, and a groove is provided on the support plate near one end of the rotating shaft, and the rotating shaft passes through the groove of the support plate.

[0012] A second anti-skid pad is fixedly mounted on the bottom of the support plate.

[0013] A wire taking-up assembly is provided at the center position of the bottom of the keyboard body, and the wire taking-up assembly includes a second auxiliary groove, an auxiliary column is fixedly connected inside the second auxiliary groove, fixing grooves are provided on both sides of the auxiliary column, and a number of placement plates are evenly fixedly connected around the auxiliary column, and a number of placement grooves are provided at the bottom of each placement plate.

[0014] Elastic sheets are fixedly connected to both sides of the inner side of the placement groove.

[0015] The beneficial effects of the utility model are:

[0016] 1. The computer keyboard with dustproof function provided in the utility model covers the outer side of the keyboard body with a dustproof cover, pushes the dustproof cover, and allows the movable slide bar to enter the interior of the movable slide groove. At this time, the range of the movable slide groove is small, and the positioning stop pin and the spring are contracted. When the dustproof cover continues to move to a specific position, the positioning stop pin moves to the positioning groove. At this time, the range of the positioning groove is relatively large, and the spring is not subjected to pressure. The positioning stop pin pops out and is stuck in the interior of the positioning groove to fix the dustproof cover, thereby solving the problem that the existing computer keyboard with dustproof function does not protect the keyboard surface, causing keyboard pollution and damage, and requiring frequent cleaning. It can not only reduce the contact between dust in the air and the electronic parts inside the keyboard body, but also prevent the user from accidentally splashing oil stains on the surface of the keyboard buttons when eating, thereby reducing the possibility and harm of keyboard pollution and damage.

[0017] 2. The computer keyboard with dustproof function provided in the utility model supports the keyboard body by bending the second anti-slip pad so that the support plate rotates through the rotating shaft, thereby increasing the inclination of the keyboard body. The inclination design conforms to ergonomic design, helps to reduce wrist pressure during use, reduces muscle fatigue and tension of the user, and effectively improves the safety and stability of the keyboard body.

[0018] 3. The computer keyboard with dustproof function provided in the utility model passes the data cable through the interior of the fixing groove, wraps around the auxiliary column, places the excess data cable inside the placement groove, and fixes it with an elastic sheet, thereby preventing the data cable from spreading, effectively improving the convenience and comfort of the user and facilitating use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the structure of a computer keyboard with dustproof function of the utility model;

[0020] Figure 2 This is a schematic diagram of the structure of the dust cover of the utility model;

[0021] Figure 3 It is a structural schematic diagram of the bottom of the utility model;

[0022] Figure 4 This is a structural schematic diagram of the movable slider of the utility model;

[0023] Figure 5 For this utility model Figure 4 A schematic diagram of the enlarged structure of the limit unit at position b;

[0024] Figure 6 This is a schematic diagram of the structure of the positioning pin of the utility model;

[0025] Figure 7 This is a schematic diagram of the structure of the adjustment component of the utility model;

[0026] Figure 8 For this utility model Figure 7 Structural diagram of the support plate;

[0027] Fig. 9 For this utility model Figure 3 Schematic diagram of the enlarged structure of the take-up assembly at a.

[0028] In the figure: 1. keyboard body; 2. button; 3. moving slide; 31. positioning slot; 4. dust cover; 5. moving slide; 6. limit unit; 61. lifting slot; 62. limit slide; 63. positioning stop pin; 64. limit slider; 65. spring; 7. cleaning sponge; 8. adjustment assembly; 81. first auxiliary slot; 82. rotating shaft; 83. support plate; 84. connecting piece; 85. second anti-skid pad; 9. wire take-up assembly; 91. second auxiliary slot; 92. auxiliary column; 93. fixed slot; 94. placement plate; 95. placement slot; 96. elastic sheet; 10. first anti-skid pad; 11. data interface; 12. tray. DETAILED DESCRIPTION

[0029] The utility model is described in detail below with reference to the accompanying drawings and specific implementation modes.

[0030] The computer keyboard with dustproof function provided by the utility model is as follows Figure 1 As shown, it includes a keyboard body 1, a button 2 is fixedly installed on the top of the keyboard body 1, and movable slide grooves 3 are opened on both sides of the keyboard body 1 along its length direction, and one end of the movable slide groove 3 passes through the keyboard body 1, as shown in FIG. Figure 3 As shown, the other end of the movable slide 3 is provided with positioning grooves 31 at the upper and lower ends. Figure 2 As shown, the movable slide 3 is movably connected with a dust cover 4, as shown in FIG. Figure 4 As shown, movable slide bars 5 are fixedly connected to both sides of the interior of the dust cover 4. The movable slide bars 5 are adapted to the movable slide groove 3. The dust cover 4 is pushed so that the movable slide bar 5 enters the interior of the movable slide groove 3. The movable slide bar 5 is provided with limited position units on both sides of the interior near the installation end of the dust cover 4. A cleaning sponge 7 is fixedly connected to the top of the interior of the dust cover 4. A tray 12 is fixedly installed on one side of the keyboard body 1 perpendicular to the movable slide groove 3, and a plurality of data interfaces 11 are provided on the other side of the keyboard body 1 perpendicular to the movable slide groove 3. Two first anti-skid pads 10 are installed at the bottom of the keyboard body 1 near the tray 12, and the two first anti-skid pads 10 are symmetrically distributed.

[0031] like Figure 5 As shown, each limiting unit includes a lifting slot 61, and limiting sliding slots 62 are provided on both sides of the inner wall of each lifting slot 61. A spring 65 is fixedly connected to the bottom of each lifting slot 61. Figure 6As shown, each spring 65 is fixed with a positioning stop pin 63 at the other end, and the positioning stop pin 63 is adapted to the positioning groove 31. Each positioning stop pin 63 is fixed with a limiting slider 64 on both sides close to the spring 65, and the limiting slider 64 is adapted to the limiting slide groove 62. The limiting slider 64 is slidably connected to the limiting slide groove 62. Since the range of the moving slide groove 3 is small, the positioning stop pin 63 and the spring 65 will shrink. When the dust cover 4 moves to a specific position, the positioning stop pin 63 will move to the positioning groove 31. Since the range of the positioning groove 31 is relatively large, the spring 65 is not subjected to the pressure of the positioning stop pin, so the positioning stop pin 63 can be popped out and stuck in the inside of the positioning groove 31 to fix the dust cover 4.

[0032] Two adjustment components 8 are provided at the bottom of the keyboard body 1 near the data interface 11. The two adjustment components 8 are symmetrically distributed. Figure 7 As shown, the adjustment assembly 8 includes a first auxiliary groove 81, the first auxiliary groove 81 has two sides fixedly connected to the same rotating shaft 82, the top of the first auxiliary groove 81 is fixedly connected to a connecting member 84, and the connecting member 84 is sleeved on the outside of the rotating shaft 82. Figure 8 As shown, the two ends of the rotating shaft 82 are movably connected to the same support plate 83, and a groove is formed on the support plate 83 near one end of the rotating shaft 82, and the rotating shaft 82 passes through the groove of the support plate 83. A second anti-skid pad 85 is fixedly installed at the bottom of the support plate 83.

[0033] A wire take-up assembly 9 is provided at the center of the bottom of the keyboard body 1. Fig. 9 As shown, the wire take-up assembly 9 includes a second auxiliary groove 91, an auxiliary column 92 is fixedly connected inside the second auxiliary groove 91, and fixing grooves 93 are provided on both sides of the auxiliary column 92. A plurality of placement plates 94 are evenly fixedly connected around the auxiliary column 92, and a plurality of placement grooves 95 are provided at the bottom of each placement plate 94. Elastic sheets 96 are fixedly connected to both sides of the placement groove 95. The data line is passed through the fixing groove 93, and then the auxiliary column 92 is wound, and the excess data line is placed inside the placement groove 95, and fixed by the elastic sheet 96 to prevent the data line from spreading.

[0034] The computer keyboard with dustproof function provided by the utility model has the following working principle: when the user finishes using the computer keyboard or is having a meal, the user covers the dustproof cover 4 on the outer side of the keyboard body 1 and pushes the dustproof cover 4 to make the movable slide bar 5 enter the inside of the movable slide groove 3. Since the range of the movable slide groove 3 is small, the positioning stop pin 63 and the spring 65 are contracted. When the dustproof cover 4 moves to a specific position, the positioning stop pin 63 will move to the positioning groove 31. Since the range of the positioning groove 31 is relatively large, the spring 65 is not subjected to the pressure of the positioning stop pin 63, so that the positioning stop pin 63 can be ejected and stuck in the inside of the positioning groove 31 to fix the dustproof cover 4. The user can make the support plate 83 rotate through the rotating shaft 82 by bending the second anti-slip pad 85, so as to support the keyboard body 1, so as to increase the inclination of the keyboard body 1. During use, the user passes the data cable through the inside of the fixing groove 93, winds the auxiliary column 92, places the excess data cable in the inside of the placement groove 95 and fixes it through the elastic sheet 96, so as to prevent the data cable from spreading.

[0035] Example 1

[0036] The computer keyboard with dustproof function proposed in this embodiment is as follows: Figure 1 As shown, it includes a keyboard body 1, a button 2 is fixedly installed on the top of the keyboard body 1, and movable slide grooves 3 are opened on both sides of the keyboard body 1 along its length direction, and one end of the movable slide groove 3 passes through the keyboard body 1, as shown in FIG. Figure 3 As shown, the other end of the movable slide 3 is provided with positioning grooves 31 at the upper and lower ends. Figure 2 As shown, the movable slide 3 is movably connected with a dust cover 4, as shown in FIG. Figure 4 As shown, movable slide bars 5 are fixedly connected to both sides of the interior of the dust cover 4 , and the movable slide bars 5 are adapted to the movable slide grooves 3 . Limiting units are provided inside both sides of the movable slide bars 5 near the installation end of the dust cover 4 .

[0037] Example 2

[0038] The computer keyboard with dustproof function proposed in this embodiment is as follows: Figure 1 As shown, it includes a keyboard body 1, a button 2 is fixedly installed on the top of the keyboard body 1, and movable slide grooves 3 are opened on both sides of the keyboard body 1 along its length direction, and one end of the movable slide groove 3 passes through the keyboard body 1, as shown in FIG. Figure 3 As shown, the other end of the movable slide 3 is provided with positioning grooves 31 at the upper and lower ends. Figure 2 As shown, the movable slide 3 is movably connected with a dust cover 4, as shown in FIG. Figure 4As shown, movable slide bars 5 are fixedly connected to both sides of the interior of the dust cover 4, and the movable slide bars 5 are adapted to the movable slide groove 3. The movable slide bars 5 are provided with limited position units inside both sides of the interior near the installation end of the dust cover 4. A cleaning sponge 7 is fixedly connected to the top of the interior of the dust cover 4. A tray 12 is fixedly installed on one side of the keyboard body 1 perpendicular to the movable slide groove 3, and a plurality of data interfaces 11 are provided on the other side of the keyboard body 1 perpendicular to the movable slide groove 3. Two first anti-skid pads 10 are installed at the bottom of the keyboard body 1 near the tray 12, and the two first anti-skid pads 10 are symmetrically distributed.

[0039] like Figure 5 As shown, each limiting unit includes a lifting slot 61, and limiting sliding slots 62 are provided on both sides of the inner wall of each lifting slot 61. A spring 65 is fixedly connected to the bottom of each lifting slot 61. Figure 6 As shown, each spring 65 is fixed with a positioning pin 63 at the other end, and the positioning pin 63 is adapted to the positioning groove 31. Each positioning pin 63 is fixed with a limiting slider 64 on both sides close to the spring 65, and the limiting slider 64 is adapted to the limiting slide groove 62, and the limiting slider 64 is slidably connected to the limiting slide groove 62.

[0040] Example 3

[0041] The computer keyboard with dustproof function proposed in this embodiment is as follows: Figure 1 As shown, it includes a keyboard body 1, a button 2 is fixedly installed on the top of the keyboard body 1, and movable slide grooves 3 are opened on both sides of the keyboard body 1 along its length direction, and one end of the movable slide groove 3 passes through the keyboard body 1, as shown in FIG. Figure 3 As shown, the other end of the movable slide 3 is provided with positioning grooves 31 at the upper and lower ends. Figure 2 As shown, the movable slide 3 is movably connected with a dust cover 4, as shown in FIG. Figure 4 As shown, movable slide bars 5 are fixedly connected to both sides of the interior of the dust cover 4, and the movable slide bars 5 are adapted to the movable slide groove 3. The movable slide bars 5 are provided with limited position units inside both sides of the interior near the installation end of the dust cover 4. A cleaning sponge 7 is fixedly connected to the top of the interior of the dust cover 4. A tray 12 is fixedly installed on one side of the keyboard body 1 perpendicular to the movable slide groove 3, and a plurality of data interfaces 11 are provided on the other side of the keyboard body 1 perpendicular to the movable slide groove 3. Two first anti-skid pads 10 are installed at the bottom of the keyboard body 1 near the tray 12, and the two first anti-skid pads 10 are symmetrically distributed.

[0042] like Figure 5 As shown, each limiting unit includes a lifting slot 61, and limiting sliding slots 62 are provided on both sides of the inner wall of each lifting slot 61. A spring 65 is fixedly connected to the bottom of each lifting slot 61. Figure 6As shown, each spring 65 is fixed with a positioning pin 63 at the other end, and the positioning pin 63 is adapted to the positioning groove 31. Each positioning pin 63 is fixed with a limiting slider 64 on both sides close to the spring 65, and the limiting slider 64 is adapted to the limiting slide groove 62, and the limiting slider 64 is slidably connected to the limiting slide groove 62.

[0043] Two adjustment components 8 are provided at the bottom of the keyboard body 1 near the data interface 11. The two adjustment components 8 are symmetrically distributed. Figure 7 As shown, the adjustment assembly 8 includes a first auxiliary groove 81, the first auxiliary groove 81 has two sides fixedly connected to the same rotating shaft 82, the top of the first auxiliary groove 81 is fixedly connected to a connecting member 84, and the connecting member 84 is sleeved on the outside of the rotating shaft 82. Figure 8 As shown, the two ends of the rotating shaft 82 are movably connected to the same support plate 83, and a groove is formed on the support plate 83 near one end of the rotating shaft 82, and the rotating shaft 82 passes through the groove of the support plate 83. A second anti-skid pad 85 is fixedly installed at the bottom of the support plate 83.

[0044] Example 4

[0045] The computer keyboard with dustproof function proposed in this embodiment is as follows: Figure 1 As shown, it includes a keyboard body 1, a button 2 is fixedly installed on the top of the keyboard body 1, and movable slide grooves 3 are opened on both sides of the keyboard body 1 along its length direction, and one end of the movable slide groove 3 passes through the keyboard body 1, as shown in FIG. Figure 3 As shown, the other end of the movable slide 3 is provided with positioning grooves 31 at the upper and lower ends. Figure 2 As shown, the movable slide 3 is movably connected with a dust cover 4, as shown in FIG. Figure 4 As shown, movable slide bars 5 are fixedly connected to both sides of the interior of the dust cover 4, and the movable slide bars 5 are adapted to the movable slide groove 3. The movable slide bars 5 are provided with limited position units inside both sides of the interior near the installation end of the dust cover 4. A cleaning sponge 7 is fixedly connected to the top of the interior of the dust cover 4. A tray 12 is fixedly installed on one side of the keyboard body 1 perpendicular to the movable slide groove 3, and a plurality of data interfaces 11 are provided on the other side of the keyboard body 1 perpendicular to the movable slide groove 3. Two first anti-skid pads 10 are installed at the bottom of the keyboard body 1 near the tray 12, and the two first anti-skid pads 10 are symmetrically distributed.

[0046] like Figure 5 As shown, each limiting unit includes a lifting slot 61, and limiting sliding slots 62 are provided on both sides of the inner wall of each lifting slot 61. A spring 65 is fixedly connected to the bottom of each lifting slot 61. Figure 6 As shown, each spring 65 is fixed with a positioning pin 63 at the other end, and the positioning pin 63 is adapted to the positioning groove 31. Each positioning pin 63 is fixed with a limiting slider 64 on both sides close to the spring 65, and the limiting slider 64 is adapted to the limiting slide groove 62, and the limiting slider 64 is slidably connected to the limiting slide groove 62.

[0047] Two adjustment components 8 are provided at the bottom of the keyboard body 1 near the data interface 11. The two adjustment components 8 are symmetrically distributed. Figure 7 As shown, the adjustment assembly 8 includes a first auxiliary groove 81, the first auxiliary groove 81 has two sides fixedly connected to the same rotating shaft 82, the top of the first auxiliary groove 81 is fixedly connected to a connecting member 84, and the connecting member 84 is sleeved on the outside of the rotating shaft 82. Figure 8 As shown, the two ends of the rotating shaft 82 are movably connected to the same support plate 83, and a groove is formed on the support plate 83 near one end of the rotating shaft 82, and the rotating shaft 82 passes through the groove of the support plate 83. A second anti-skid pad 85 is fixedly installed at the bottom of the support plate 83.

[0048] A wire take-up assembly 9 is provided at the center of the bottom of the keyboard body 1. Fig. 9 As shown, the wire take-up assembly 9 includes a second auxiliary groove 91, an auxiliary column 92 is fixedly connected inside the second auxiliary groove 91, fixing grooves 93 are provided on both sides of the auxiliary column 92, a plurality of placement plates 94 are evenly fixedly connected around the auxiliary column 92, and a plurality of placement grooves 95 are provided at the bottom of each placement plate 94. Elastic sheets 96 are fixedly connected to both sides of the placement groove 95.

Claims

1. A computer keyboard with dustproof function, characterized in that: The keyboard body (1) comprises a keyboard body, a button (2) is fixedly mounted on the top of the keyboard body (1), movable grooves (3) are provided on both sides of the keyboard body (1) along the length direction thereof, one end of the movable groove (3) passes through the keyboard body (1), and the other end of the movable groove (3) is provided with positioning grooves (31) at the upper and lower sides, the movable groove (3) is movably connected with a dust cover (4), movable slide bars (5) are fixedly mounted on both sides of the interior of the dust cover (4), the movable slide bars (5) are adapted to the movable groove (3), and limiting units are provided on both sides of the interior of the movable slide bar (5) close to the installation end of the dust cover (4).

2. The computer keyboard with dustproof function according to claim 1, characterized in that: A cleaning sponge (7) is fixedly connected to the top of the interior of the dust cover (4).

3. The computer keyboard with dustproof function according to claim 1, characterized in that: A tray (12) is fixedly mounted on one side of the keyboard body (1) perpendicular to the movable slide groove (3), and a plurality of data interfaces (11) are provided on the other side of the keyboard body (1) perpendicular to the movable slide groove (3).

4. The computer keyboard with dustproof function according to claim 3, characterized in that: Two first anti-skid pads (10) are installed at the bottom of the keyboard body (1) near the tray (12), and the two first anti-skid pads (10) are symmetrically distributed.

5. The computer keyboard with dustproof function according to claim 1, characterized in that: Each of the limiting units comprises a lifting slot (61), and limiting sliding slots (62) are provided on both sides of the inner wall of each of the lifting slots (61). A spring (65) is fixedly connected to the bottom of each of the lifting slots (61), and a positioning stop pin (63) is fixedly connected to the other end of each of the springs (65). The positioning stop pin (63) is matched with the positioning slot (31), and both sides of each of the positioning stop pins (63) close to the spring (65) are fixedly connected with limiting sliders (64), and the limiting sliders (64) are matched with the limiting sliding slots (62), and the limiting sliders (64) are slidably connected to the limiting sliding slots (62).

6. The computer keyboard with dustproof function according to claim 3, characterized in that: Two adjustment components (8) are provided at the bottom of the keyboard body (1) near the data interface (11), and the two adjustment components (8) are symmetrically distributed. The adjustment components (8) include a first auxiliary groove (81), and the same rotating shaft (82) is fixedly connected to both sides of the first auxiliary groove (81). A connecting piece (84) is fixedly connected to the top of the first auxiliary groove (81), and the connecting piece (84) is sleeved outside the rotating shaft (82). The two ends of the rotating shaft (82) are movably connected to the same support plate (83), and the support plate (83) is provided with a groove near one end of the rotating shaft (82), and the rotating shaft (82) passes through the groove of the support plate (83).

7. The computer keyboard with dustproof function according to claim 6, characterized in that: A second anti-slip pad (85) is fixedly mounted on the bottom of the support plate (83).

8. The computer keyboard with dustproof function according to claim 1, characterized in that: A wire take-up assembly (9) is provided at the center of the bottom of the keyboard body (1), and the wire take-up assembly (9) comprises a second auxiliary groove (91), an auxiliary column (92) is fixedly connected inside the second auxiliary groove (91), fixing grooves (93) are provided on both sides of the auxiliary column (92), a plurality of placement plates (94) are evenly fixedly connected around the auxiliary column (92), and a plurality of placement grooves (95) are provided at the bottom of each of the placement plates (94).

9. The computer keyboard with dustproof function according to claim 8, characterized in that: Elastic sheets (96) are fixedly connected to both sides of the interior of the placement groove (95).

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