Laser lettering and marking device for stainless steel vacuum cup

Abstract

The utility model discloses a stainless steel vacuum cup laser lettering and marking device which comprises a workbench, a marking assembly and a fixing assembly are arranged on the workbench, a first moving assembly is further arranged on the workbench, the fixing assembly comprises two installation bases symmetrically installed on the workbench, and the two installation bases are the first installation base and the second installation base respectively. The adjacent side walls of the first mounting base and the second mounting base are each rotationally provided with a connecting shaft, the connecting shaft on the first mounting base is connected with a fixing base, a containing groove is formed in the side wall, away from the first mounting base, of the fixing base, and a plurality of first pressing mechanisms are arranged in the containing groove; a first telescopic device is arranged on a connecting shaft on the second mounting base, a fixing rod is arranged at the telescopic end of the first telescopic device, and a plurality of second pressing mechanisms are arranged on the outer wall of the fixing rod.

Description

Technical Field

[0001] This utility model relates to a laser engraving and marking device, and more particularly to a laser engraving and marking device for stainless steel thermos cups. Background Technology

[0002] Laser engraving and marking equipment for stainless steel thermos cups is a specialized device for laser marking on the surface of stainless steel thermos cups. This equipment uses a high-precision laser beam to engrave words, marks, or patterns on the thermos cups. It is widely used in the personalization, branding, and pattern design of stainless steel cups. Laser engraving is characterized by high precision, durability, and environmental friendliness, and is therefore widely adopted.

[0003] In existing technologies, such as the laser marking machine for processing thermos cups disclosed in CN 221289890 U, a base, transmission box and clamping mechanism are set up. The support seat is movably connected to the base through a rotating shaft, so that the support seat can be tilted at an angle. The clamping mechanism limits the angle after the support seat moves to a certain angle, so that the support seat can be stably tilted to a certain angle. This allows the conical thermos cup to be placed on the surface of the support seat, avoiding the shape of the thermos cup from affecting the engraved pattern.

[0004] However, it also has some shortcomings. For example, when the thermos is placed on the support, it cannot be fixed and limited. However, if the thermos is not fixed and the marking is done directly, it is easy for the thermos to be displaced during the marking process due to vibration, gravity or laser impact. This will cause the pattern, text or QR code on the thermos to deviate from the predetermined position or be incomplete, thereby reducing the finished product qualification rate of the thermos. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a laser engraving and marking device for stainless steel thermos cups that can stably mark different types of thermos cups.

[0006] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: a laser engraving and marking device for stainless steel thermos cups, including a worktable, on which a marking component and a fixing component for fixing and limiting the thermos cup are provided. The worktable also includes a first moving component for controlling the movement of the marking component on the worktable. The fixing component includes two mounting seats, which are symmetrically mounted on the worktable, and are respectively a first mounting seat and a second mounting seat; and two connecting shafts, which are rotatably mounted on the first mounting seat and the second mounting seat, respectively. On the side wall adjacent to the mounting base; a fixed base, which is connected to the connecting shaft on the first mounting base, the fixed base has a receiving groove on the side wall away from the first mounting base for accommodating the bottom of the thermos cup, and a plurality of first pressing mechanisms are evenly arranged along the groove wall; a first telescopic device, which is connected to the connecting shaft on the second mounting base; a fixed rod, which is installed on the telescopic end of the first telescopic device, the fixed rod is coaxial with the fixed base, the fixed rod is used to insert into the thermos cup from the mouth of the thermos cup, and a plurality of second pressing mechanisms are evenly arranged circumferentially on the outer wall of the fixed rod.

[0007] A further preferred embodiment of this utility model is as follows: each of the first pressing mechanisms includes a first telescopic rod, the first telescopic rod is installed in a receiving groove, and the telescopic end of the first telescopic rod is provided with a pressing block made of rubber.

[0008] A further preferred embodiment of this utility model is as follows: the second pressing mechanism includes a second telescopic rod, the second telescopic rod is installed on the outer wall of the fixed rod, the telescopic end of the second telescopic rod is provided with a wheel frame, and a roller made of rubber is rotatably provided in the wheel frame.

[0009] A further preferred embodiment of the present invention is as follows: a driving device is provided on the outer wall of the first mounting base or the second mounting base, the output end of the driving device is connected to the connecting shaft on the first mounting base or the second mounting base, and the driving device is used to control the rotation of the connecting shaft.

[0010] A further preferred embodiment of this utility model is as follows: the first moving component includes a first lead screw assembly, which is mounted on the worktable and located inside the fixed component on the worktable; a second lead screw assembly, which is mounted on the worktable and is perpendicular to the upper surface of the worktable, with its bottom connected to the first lead screw assembly, and the first lead screw assembly is used to control the second lead screw assembly to move back and forth on the worktable; and a second moving component, which is mounted on the second lead screw assembly, which is used to control the second moving component to move back and forth on the second lead screw assembly, with the second moving component connected to the marking component on the side closer to the fixed component, and the second moving component is used to control the marking component to move back and forth above the worktable.

[0011] A further preferred embodiment of this utility model is: the fixing rod has a rubber abutment block at one end near the fixing seat, the abutment block being used to abut against the bottom of the thermos cup.

[0012] A further preferred embodiment of this utility model is: the pressing block has an arc-shaped groove on the side wall away from the first telescopic rod that fits against the outer wall of the thermos cup.

[0013] A further preferred embodiment of this utility model is as follows: the second moving component includes a connecting seat, which is sleeved on the second lead screw assembly, and the second lead screw assembly controls the connecting seat to move up and down reciprocally on the second lead screw assembly; a connecting plate, of which at least two are provided, which are slidably installed on the left and right sides of the connecting seat respectively, and each connecting plate has an installation plate connected to the marking component at one end near the fixed component; and a second telescopic device, of which at least two are provided, which are installed on the side wall of the connecting seat, and the telescopic end of the second telescopic device is connected to the connecting plate.

[0014] A further preferred embodiment of this utility model is as follows: a guide groove is provided on the side walls of the left and right sides of the connecting seat, a guide block connected to the connecting plate is slidably provided in the guide groove, a limiting groove is provided at the top and bottom of the guide groove, and a limiting block is provided at the top and bottom of the guide block and slidably connected to the limiting groove.

[0015] A further preferred embodiment of this utility model is: a third telescopic rod is provided at the bottom of the marking component, and a buffer block made of rubber is provided at the telescopic end of the third telescopic rod.

[0016] Compared with the prior art, the advantages of this utility model are that by using the fixed base and the first pressing mechanism together, and by using the fixed rod and the second pressing mechanism together, it is possible to fix thermos cups of different diameters. At the same time, by using the first telescopic device together, it is possible to fix thermos cups of different lengths. Thus, the laser engraving and marking device can stably mark different types of thermos cups, and at the same time, it ensures the reliability of the laser engraving and marking device when marking different types of thermos cups. Attached Figure Description

[0017] The present invention will be further described in detail below with reference to the accompanying drawings and preferred embodiments. However, those skilled in the art will understand that these drawings are drawn only for the purpose of explaining the preferred embodiments and therefore should not be construed as limiting the scope of the present invention. Furthermore, unless specifically indicated, the drawings are only schematic representations of the composition or structure of the described objects and may contain exaggerated depictions, and the drawings are not necessarily drawn to scale.

[0018] Figure 1 This is a front view of the present invention;

[0019] Figure 2 This is the left view of the present invention;

[0020] Figure 3 This is the right view of the present invention;

[0021] Figure 4 This is a top view of the present invention;

[0022] Figure 5 This is a three-dimensional structural schematic diagram of the present invention;

[0023] Figure 6 This is a schematic diagram of the isometric three-dimensional structure of this utility model;

[0024] Figure 7 This is a three-dimensional structural diagram of the second moving component in this utility model when it is extended;

[0025] Figure 8 This is an isometric three-dimensional structural diagram of the second moving component in this utility model when it is extended;

[0026] Figure 9 This is a front view of the fixing base in this utility model;

[0027] Figure 10 This is a three-dimensional structural diagram of the fixing base in this utility model;

[0028] Figure 11 This is a three-dimensional structural diagram of the first pressing mechanism in this utility model;

[0029] Figure 12 This is a three-dimensional structural diagram of the connection between the fixed rod and the second pressing mechanism in this utility model;

[0030] Figure 13 This is a three-dimensional structural schematic diagram of the second pressing mechanism in this utility model;

[0031] Figure 14 This is a front view of the second pressing mechanism in this utility model.

[0032] In the diagram: 1. Workbench; 2. Marking assembly; 21. Third telescopic rod; 3. Fixing assembly; 31. First mounting base; 311. Second mounting base; 32. Connecting shaft; 33. Fixing base; 331. Receiving groove; 332. First clamping mechanism; 3321. First telescopic rod; 3322. Clamping block; 34. First telescopic device; 35. Fixing rod; 351. Abutment block; 36. Drive device; 37. Second clamping mechanism; 371. Second telescopic rod; 372. Wheel frame; 373. Roller; 4. First moving assembly; 41. First lead screw assembly; 42. Second lead screw assembly; 43. Second moving assembly; 431. Connecting base; 4311. Guide groove; 4312. Limiting groove; 432. Connecting plate; 433. Second telescopic device; 434. Mounting plate; 435. Guide block; 4351. Limiting block. Detailed Implementation

[0033] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Those skilled in the art will appreciate that these descriptions are merely descriptive and exemplary and should not be construed as limiting the scope of protection of the present invention.

[0034] It should be noted that similar labels in the following figures indicate similar items; therefore, once an item is defined in one figure, it may not be further defined and explained in subsequent figures.

[0035] This embodiment mainly describes the structure of a laser engraving and marking device for stainless steel thermos cups, as detailed below:

[0036] As shown in the figure - Figure 14As shown, a laser engraving and marking device for stainless steel thermos cups includes a worktable 1. The worktable 1 is equipped with a marking component 2 for laser marking the thermos cup and a fixing component 3 for fixing and limiting the thermos cup. In order to facilitate the movement of the marking component 2 on the worktable 1, a first moving component 4 for controlling the movement of the marking component 2 on the worktable 1 is also provided. When the laser engraving and marking device is working, the thermos cup to be marked is first placed on the fixing component 3 and fixed and limited by the fixing component 3. Then, the first moving component 4 is activated to control the movement of the marking component 2 on the worktable 1 until the marking component 2 moves to be aligned with the position to be marked on the thermos cup. Finally, the marking component 2 is activated to mark the thermos cup.

[0037] The fixing component 3 includes two mounting seats symmetrically mounted on the workbench 1, namely a first mounting seat 31 and a second mounting seat 311. A connecting shaft 32 is rotatably mounted on the adjacent side wall of the first mounting seat 31 and the second mounting seat 311. A fixing seat 33 is mounted on the connecting shaft 32 on the first mounting seat 31. A receiving groove 331 for accommodating the bottom of a thermos cup is formed on the side wall of the fixing seat 33 away from the first mounting seat 31. At the same time, a plurality of first pressing mechanisms 332 are evenly arranged along the groove wall in the receiving groove 331. The first pressing mechanism 332 is used to press and abut against the thermos cup located in the receiving groove 331. Then, a first telescopic device 34 is provided on the connecting shaft 32 on the second mounting base 311. Then, a fixing rod 35 is provided on the telescopic end of the first telescopic device 34. The fixing rod 35 is coaxially set with the fixing base 33. The fixing rod 35 is used to insert into the thermos cup from the mouth of the thermos cup. Finally, a plurality of second pressing mechanisms 37 are circumferentially and evenly arranged on the outer wall of the fixing rod 35. When the fixing rod 35 extends into the thermos cup, the second pressing mechanism 37 presses and abuts against the inner wall of the thermos cup.

[0038] When the fixing component 3 fixes the thermos cup to be marked, the first telescopic device 34 is activated first, shortening its telescopic end. As the first telescopic device 34 shortens, it moves the fixing rod 35 away from the fixing seat 33. This makes it easier for the operator to place the thermos cup to be marked between the first mounting seat 31 and the second mounting seat 311. Then, the operator inserts the thermos cup to be marked through the cup opening at the top of the cup body into the fixing rod 35. The fixing rod 35 continues until its end away from the first telescopic device 34 abuts against the bottom of the thermos cup. Then, the second pressing mechanism 37 is activated, pressing the inner wall of the thermos cup tightly against it, thus preventing the fixing rod 35 from moving away from the first telescopic device 34. When one end of the first telescopic device 34 comes into contact with the bottom of the thermos, it scratches the inner wall of the thermos. A rubber abutment block 351 is provided at the end of the fixing rod 35 near the fixing seat 33. The abutment block 351 is used to abut with the bottom of the thermos. Then the first telescopic device 34 is activated again to extend the telescopic end of the first telescopic device 34. As the telescopic end of the first telescopic device 34 extends, the thermos on the fixing rod 35 can move toward the fixing seat 33 until the bottom of the thermos enters the receiving groove 331 on the fixing seat 33. Finally, the first pressing mechanism 332 is activated to press and abut against the outer wall of the thermos located in the receiving groove 331.

[0039] Thus, through the combined use of the fixed base 33 and the first pressing mechanism 332, and through the combined use of the fixed rod 35 and the second pressing mechanism 37, insulated cups of different diameters can be fixed. Simultaneously, through the combined use of the first telescopic device 34, insulated cups of different lengths can be fixed. This enables the laser marking device to stably mark different types of insulated cups, while also ensuring the reliability of the laser marking device when marking different types of insulated cups. Because laser marking is performed on the outer wall of the insulated cup, marking will be performed on the surface of the insulated cup at different angles, the connecting shaft 32 is rotatably connected to the first mounting base 31 and the second mounting base 311 respectively. Therefore, the thermos cup can rotate between the first mounting base 31 and the second mounting base 311, which facilitates the laser marking device to mark the thermos cup. In order to facilitate the control of the rotation of the thermos cup, a drive device 36 is provided on the outer wall of the first mounting base 31 or the second mounting base 311. The output end of the drive device 36 is connected to the connecting shaft 32 on the first mounting base 31 or the second mounting base 311. Thus, the drive device 36 can be used to control the rotation of the connecting shaft 32. Therefore, when it is necessary to control the rotation of the thermos cup, the rotation of the thermos cup can be controlled by starting the drive device 36, which facilitates the control of the thermos cup rotating between the first mounting base 31 and the second mounting base 311.

[0040] Furthermore, each of the first pressing mechanisms 332 includes a first telescopic rod 3321 installed in the receiving groove 331 and a pressing block 3322 made of rubber installed on the telescopic end of the first telescopic rod 3321. In this way, when the bottom of the thermos cup enters the receiving groove 331, the first telescopic rod 3321 is activated to extend the telescopic end of the first telescopic rod 3321, so that the pressing block 3322 installed on the first telescopic rod 3321 can move toward the thermos cup until the pressing block 3322 can press the thermos cup. The pressing block 3322 is made of rubber to prevent the pressing block 3322 from scratching the outer wall of the thermos cup. At the same time, in order to improve the fit between the pressing block 3322 and the outer wall of the thermos cup, an arc-shaped groove is provided on the side wall of the pressing block 3322 away from the first telescopic rod 3321 to fit the outer wall of the thermos cup.

[0041] The second pressing mechanism 37 includes a second telescopic rod 371 mounted on the outer wall of the fixed rod 35. A wheel frame 372 is provided at the telescopic end of the second telescopic rod 371, and a rubber roller 373 is rotatably mounted in the wheel frame 372. When the fixed rod 35 is inserted into the thermos from the mouth of the thermos, the second telescopic rod 371 is activated, causing the telescopic end of the second telescopic rod 371 to extend. This causes the wheel frame 372 mounted on the second telescopic rod 371, together with the roller 373, to move toward the inner wall of the thermos until the roller 373 can press against the inner wall of the thermos. The rubber roller 373 and wheel frame 372 prevent the fixed rod 35 from scratching the inner wall of the thermos when it is inserted. At the same time, the rotatable connection between the roller 373 and the wheel frame 372 facilitates the insertion of the fixed rod 35 into the thermos.

[0042] The first moving assembly 4 includes a first lead screw assembly 41 mounted on the workpiece, a second lead screw assembly 42 mounted on the worktable 1 and connected to the first lead screw assembly 41, and a second moving assembly 43 mounted on the second lead screw assembly 42. The first lead screw assembly 41 is located inside the fixed assembly 3 on the worktable 1, while the second lead screw assembly 42 is arranged perpendicularly to the upper surface of the worktable 1. The second moving assembly 43 is connected to the marking assembly 2 on the side closer to the fixed assembly 3. The first lead screw assembly 41 is used to control the second lead screw assembly 42 to move back and forth on the worktable 1, the second lead screw assembly 42 is used to control the second moving assembly 43 to move back and forth on the second lead screw assembly 42, and the second moving assembly 43 is used to control the marking assembly 2 to move back and forth above the worktable 1.

[0043] When the first lead screw assembly 41 is working, it can drive the second lead screw assembly 42, together with the second moving assembly 43 and the marking assembly 2 to move back and forth on the worktable 1. When the second lead screw assembly 42 is working, it can drive the second moving assembly 43 and the marking assembly 2 to move back and forth on the worktable 1. In this way, the marking assembly 2 can move back and forth, back and forth, and forward and backward on the worktable 1 through the cooperation of the first lead screw assembly 41, the second lead screw assembly 42 and the second moving assembly 43. This makes it convenient for the marking assembly 2 to move toward the marking position on the thermos. The first lead screw assembly 41 and the second lead screw assembly 42 are common lead screw moving mechanisms and are not described in detail. In order to avoid the problem of collision when the marking assembly 2 moves downward on the worktable 1, a third telescopic rod 21 is provided at the bottom of the marking assembly 2, and a buffer block made of rubber is provided at the telescopic end of the third telescopic rod 21. The third telescopic rod 21 is a spring telescopic rod.

[0044] Furthermore, the second moving component 43 includes a connecting seat 431 sleeved on the second lead screw assembly 42. During operation, the second lead screw assembly 42 controls the connecting seat 431 to reciprocate up and down on the second lead screw assembly 42. A connecting plate 432 is slidably disposed on the left and right sides of the connecting seat 431. A mounting plate 434 connected to the marking component 2 is disposed at the end of the connecting plate 432 near the fixed component 3. Two second telescopic devices 433 are disposed on the side wall of the connecting seat 431 near the fixed component 3, and the telescopic ends of the second telescopic devices 433 are connected to the connecting plate 432. When the second moving component 43 controls the marking component... 2. When moving, the second telescopic device 433 can be activated to extend or shorten. When the second telescopic device 433 extends, it can push the mounting plate 434 away from the connecting seat 431. As the mounting plate 434 moves, the marking component 2 connected to the mounting plate 434 can move forward on the worktable 1. When the second telescopic device 433 shortens, it can pull the mounting plate 434 closer to the connecting seat 431. Thus, as the mounting plate 434 moves, the marking component 2 connected to the mounting plate 434 can move backward on the worktable 1. The setting of the connecting plate 432 can ensure that the marking component 2 is more stable when moving.

[0045] To ensure the stability of the connecting plate 432 and the connecting seat 431 during sliding, a guide groove 4311 is provided on the side walls of the left and right sides of the connecting seat 431, and a guide block 435 connected to the connecting plate 432 is slidably provided in the guide groove 4311. In this way, when the connecting plate 432 moves, the guide block 435 can slide in the guide groove 4311. In order to prevent the guide block 435 from disengaging from the guide groove 4311, a limiting groove 4312 is provided at the top and bottom of the guide groove 4311, and a limiting block 4351 slidably connected to the limiting groove 4312 is provided at the top and bottom of the guide block 435.

[0046] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0047] The above provides a detailed description of the laser engraving and marking device for stainless steel thermos cups provided by this utility model. Specific examples have been used to illustrate the principle and implementation of this utility model. The descriptions of the embodiments above are only for the purpose of helping to understand this utility model and its core ideas. It should be noted that those skilled in the art can make several improvements and modifications to this utility model without departing from its principle, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A laser engraving and marking device for a stainless steel thermos cup, comprising a worktable, wherein a marking component and a fixing component for fixing and limiting the thermos cup are disposed on the worktable, and a first moving component for controlling the movement of the marking component on the worktable is further disposed on the worktable, characterized in that: The fixing component includes The mounting base has two mounting bases, which are symmetrically mounted on the worktable. The two mounting bases are the first mounting base and the second mounting base. The connecting shaft has two shafts, which are rotatably mounted on the side wall adjacent to the first mounting base and the second mounting base, respectively. A fixed base is connected to a connecting shaft on a first mounting base. The fixed base has a receiving groove on a side wall away from the first mounting base for accommodating the bottom of a thermos cup. Multiple first pressing mechanisms are evenly arranged along the groove wall in the receiving groove. A first telescopic device is connected to a connecting shaft on a second mounting base; A fixing rod is installed at the telescopic end of the first telescopic device. The fixing rod is coaxial with the fixing seat. The fixing rod is used to insert into the thermos cup from the mouth of the thermos cup. Multiple second pressing mechanisms are evenly arranged circumferentially on the outer wall of the fixing rod.

2. The laser engraving and marking device for stainless steel thermos cups according to claim 1, characterized in that: Each of the first pressing mechanisms includes a first telescopic rod, which is installed in a receiving groove, and the telescopic end of the first telescopic rod is provided with a pressing block made of rubber.

3. The laser engraving and marking device for stainless steel thermos cups according to claim 1, characterized in that: The second clamping mechanism includes a second telescopic rod, which is installed on the outer wall of the fixed rod. The telescopic end of the second telescopic rod is provided with a wheel frame, and a roller made of rubber is rotatably installed in the wheel frame.

4. The laser engraving and marking device for stainless steel thermos cups according to claim 1, characterized in that: A driving device is provided on the outer wall of the first or second mounting base. The output end of the driving device is connected to the connecting shaft on the first or second mounting base. The driving device is used to control the rotation of the connecting shaft.

5. The laser engraving and marking device for a stainless steel thermos cup according to claim 1, characterized in that: The first moving component includes The first lead screw assembly is mounted on the workpiece and is located inside the fixed assembly on the worktable. The second lead screw assembly and the second lead screw moving assembly are mounted on the worktable. The second lead screw assembly is set perpendicular to the upper surface of the worktable. The bottom of the second lead screw assembly is connected to the first lead screw assembly. The first lead screw assembly is used to control the second lead screw assembly to move back and forth on the worktable. The second moving component is mounted on the second lead screw assembly. The second lead screw assembly is used to control the second moving component to move up and down reciprocally on the second lead screw assembly. The second moving component is connected to the marking component on the side near the fixed component. The second moving component is used to control the marking component to move back and forth above the worktable.

6. The laser engraving and marking device for stainless steel thermos cups according to claim 1, characterized in that: The fixing rod has a rubber abutment block at one end near the fixing seat, which is used to abut against the bottom of the thermos cup.

7. The laser engraving and marking device for stainless steel thermos cups according to claim 2, characterized in that: The clamping block has an arc-shaped groove on the side wall away from the first telescopic rod that fits against the outer wall of the thermos.

8. The laser engraving and marking device for stainless steel thermos cups according to claim 5, characterized in that: The second moving component includes A connecting seat is sleeved on a second lead screw assembly, and the second lead screw assembly controls the connecting seat to move up and down reciprocally on the second lead screw assembly. The connecting plate is provided in no less than two pieces, and the connecting plates are slidably installed on the left and right sides of the connecting seat respectively. The connecting plate has a mounting plate that is connected to the marking component at one end near the fixing component. The second telescopic device is provided in at least two parts. The second telescopic device is installed on the side wall of the connecting seat, and the telescopic end of the second telescopic device is connected to the connecting plate.

9. A laser engraving and marking device for stainless steel thermos cups according to claim 8, characterized in that: A guide groove is provided on each of the left and right side walls of the connecting seat. A guide block connected to the connecting plate is slidably disposed in each guide groove. A limiting groove is provided at the top and bottom of the guide groove. A limiting block is provided at the top and bottom of the guide block and is slidably connected to the limiting groove.

10. A laser engraving and marking device for stainless steel thermos cups according to claim 8, characterized in that: The bottom of the marking assembly is provided with a third telescopic rod, and the telescopic end of the third telescopic rod is provided with a buffer block made of rubber.

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