Cup holder

Abstract

The utility model discloses a cup holder, and relates to the technical field of beverage preparation, the cup holder comprises a vertical rack, a cup holder plate with the upper surface in the shape of a concave arc, and a horizontal mounting seat sleeved on the rack, a latch is arranged in the mounting seat, the lower part of the rear end of the latch is abutted against and matched with a shifting fork used for positioning the upper and lower limits of the front end of the latch in a tooth groove of the rack, and the lower part of the rear end of the latch is abutted against the shifting fork. The front end of the shifting fork is rotatably connected to the interior of the mounting base, the clamping latch can be arranged in a backward self-resetting mode, the rear end of the shifting fork is supported below the cup containing disc, tenon columns are symmetrically fixed to the two sides of the front end of the cup containing disc, and the front ends of the tenon columns are rotatably inserted into and pulled out of the mounting base in an upward and downward limiting mode. The height of the cup placing disc can be accurately adjusted, the structure is greatly simplified, meanwhile, the convenience of use and disassembly and assembly is greatly improved, and the reliability and the safety of use are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of beverage preparation, in particular to a cup holder. Background Art

[0002] In the process of making coffee and other beverages (coffee is taken as an example below), a cup tray is generally used. The cup tray is usually assembled with a coffee machine. After placing the cup on the cup tray, the coffee liquid can be added, and the steam pipe can also be inserted to foam the coffee liquid. However, since the coffee machine often vibrates when working, the cup tray will also vibrate, causing the cup to shift. Once the displacement is too large, it is very easy to cause the coffee liquid outlet and the cup to be misaligned, causing the coffee liquid to splash outside; in addition, traditional cup trays often cannot be adjusted to any position, and thus cannot be used for cups of different heights.

[0003] In the prior art, research on cup placing devices, such as the lifting cup holder disclosed in patent application CN108891329A, can realize lifting and locking of the cup placing tray at any position to a certain extent through the cooperation of a vertically arranged rack and a locking and positioning mechanism connected between the rack and the cup placing tray carrying the cup.

[0004] However, the prior art still has the problem that the cup is easily displaced due to the vibration of the cup tray, and the anti-slip performance is limited, so the safety and reliability of use are also limited. At the same time, most of the prior art are complex in structure and generally convenient to use. For example, in a lifting cup holder disclosed in patent application CN108891329A, the cup tray can only be unlocked by deflecting and pushing the eccentric rod, and the locking and positioning mechanism can only be opposed to the upper limit of the cup tray. A spring that pushes the cup tray upward is required to achieve dynamic balance of the height position of the cup tray, which also affects the accuracy of height adjustment and makes the convenience of disassembly and assembly generally.

[0005] Therefore, a new technical solution is needed to solve the above technical problems. Utility Model Content

[0006] The purpose of the utility model is to provide a cup holder to solve the technical problems in the prior art mentioned above that most of the prior art have complex structures, are generally convenient to use and disassemble, and have generally poor accuracy in height adjustment, and that cups in the prior art are still easily displaced due to the vibration of the cup holder, thereby affecting the safety and reliability of use.

[0007] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0008] A cup rack comprises a vertical rack, a cup tray with an inwardly concave arc upper surface, and a mounting seat sleeved on the rack, wherein the outer edge of the cup tray vertically extends upward and downward to form an upper flange and a lower flange, respectively, a through hole is provided at the center of the cup tray, and the cup tray is also provided with a plurality of hollow hole groups from the inside to the outside with the through hole as the center, and the hollow hole groups each comprise a plurality of arc holes uniformly distributed along the circumferential direction, and two connecting seats are respectively fixed to the upper and lower ends of the rack, and each of the connecting seats is provided with The mounting seat is horizontally arranged and has a latch inside. The tooth grooves of the rack are all isosceles trapezoidal structures. The lower rear end of the latch abuts against a fork for positioning the upper and lower limits of its front end in the tooth groove. The front end of the fork can be rotatably connected to the inside of the mounting seat. The latch can be self-reset backward. The rear end of the fork is supported under the cup tray. Falcon columns are symmetrically fixed on both sides of the front end of the cup tray. The front ends of the falcon columns are plugged in and pulled out of the mounting seat by upward and downward limited rotation.

[0009] Further, a concave groove for accommodating the latch and the shift fork is formed in the middle of one side of the mounting seat close to the latch, the upper surface of the falcon column is an obtuse L-shaped structure and is formed with an upper inclined surface III and an upper horizontal surface from front to back, the lower surface of the falcon column is a V-shaped structure and is formed with a lower inclined surface II and a lower inclined surface III from front to back, and the mounting seat is formed with mounting cavities for accommodating the falcon column in a one-to-one correspondence, the two mounting cavities are symmetrically arranged on both sides of the concave groove, and the top inner walls of the mounting cavities are V-shaped. The mounting cavity has an L-shaped structure and has an upper inclined surface IV and an upper inclined surface V formed from front to back. The bottom inner wall of the mounting cavity has an obtuse L-shaped structure and has a lower horizontal surface and a lower inclined surface IV formed from front to back. The upper inclined surface III corresponds to the upper inclined surface IV in a one-to-one abutment fit or gap fit, the upper horizontal surface corresponds to the upper inclined surface V in a one-to-one abutment fit or gap fit, the lower inclined surface II corresponds to the lower horizontal surface in a one-to-one abutment fit or gap fit, and the lower inclined surface III corresponds to the lower inclined surface IV in a one-to-one abutment fit or gap fit.

[0010] Furthermore, the mounting seat is provided with a mounting hole for the rack to pass through, the concave groove and the mounting hole are arranged horizontally, and an elastic claw for pushing the latch backward is also provided in the concave groove, and two elastic claws are symmetrically provided up and down, the front end of the latch is an isosceles trapezoidal structure and is formed with an upper inclined surface I and a lower inclined surface I, the free ends of the two elastic claws are respectively abutted and matched with the upper inclined surface I and the lower inclined surface I, an upper sliding surface is formed at the rear adjacent position of the upper inclined surface I, and a lower inclined surface is formed at the rear adjacent position of the lower inclined surface I. Sliding surface, the upper sliding surface and the lower sliding surface are respectively matched with the top inner wall and the bottom inner wall gap of the concave groove, the front end of the fork is wedge-shaped and formed with an upper inclined surface II, the rear end of the latch is formed with a rear inclined surface abutting with the upper inclined surface II, the rear end of the fork is formed with a tail handle, the upper surface of the tail handle abuts against the lower surface of the cup plate, two circular holes are symmetrically opened on the side walls of the concave groove, and two cylinders perpendicular to it are symmetrically arranged on both sides of the fork, and the cylinders are inserted into the circular holes one by one.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] 1. The utility model is provided with a cup tray, a vertical rack and a horizontal mounting seat, and the mounting seat is sleeved on the rack. Through the coordination of the falcon column, the latch and the fork in the mounting seat, the cup tray and the rack, the convenience of use and disassembly is greatly improved while achieving accurate height adjustment of the cup tray. Specifically, the rotation of the falcon column will drive the rotation of the cup tray. When the front end of the falcon column is rotated upward and plugged into the mounting seat, the cup tray at the rear rotates downward, exerting pressure on the fork, so that the fork rotates and presses against the latch. The latch is directly limited by the tooth groove of the rack, and the cup tray is also locked and positioned. When the front end of the falcon column rotates downward, the cup tray at the rear rotates upward. At this time, in addition to the falcon column and the cup tray being directly pulled out from the mounting seat, the pressure of the cup tray on the fork The latch disappears, and the pressure of the shift fork on the latch also disappears. The latch can be reset backward and leave the rack. The mounting seat and the cup tray can be directly moved up and down. In the whole process, the upper and lower limits of the cup tray are directly realized synchronously by the rack, and there is no need to add other unlocking components such as eccentric rods, so the structure is greatly simplified. In addition, the upper surface of the cup tray in the utility model is a concave arc-shaped matching setting, so that when the cup is placed on the cup tray, it is always in the center of the cup tray under the action of vibration, which effectively prevents the displacement of the cup and has a good anti-slip effect. On this basis, the symmetrical setting of the falcon column at the front end of the cup tray makes the forces on both sides of the cup tray balanced, effectively preventing the cup tray from tilting, thereby further preventing the displacement of the cup, and ultimately greatly improving the safety and reliability of use.

[0013] 2. The mounting seat in the utility model is formed with mounting cavities for accommodating the falcon column in a one-to-one correspondence. In the utility model, the upper inclined surface III of the falcon column and the upper inclined surface IV of the mounting cavity, the upper horizontal surface of the falcon column and the upper inclined surface V of the mounting cavity, the lower inclined surface II of the falcon column and the lower horizontal surface of the mounting cavity, and the lower inclined surface III of the falcon column and the lower inclined surface IV of the mounting cavity are arranged in coordination, so as to ensure that the front end of the falcon column can be inserted and pulled out of the mounting seat by upward and downward limited rotation. Specifically, when the upper inclined surface III of the falcon column abuts against the upper inclined surface IV of the mounting cavity, and the lower inclined surface III of the falcon column abuts against the lower inclined surface IV of the mounting cavity, the falcon column is inserted into the mounting cavity. At this time, There are gaps between the upper horizontal surface of the falcon column and the upper inclined surface V of the installation cavity, as well as between the lower inclined surface II of the falcon column and the lower horizontal surface of the installation cavity. When the front end of the falcon column rotates downward in the installation cavity, that is, the cup plate rotates upward, the upper horizontal surface of the falcon column abuts against the upper inclined surface V of the installation cavity, and the lower inclined surface II of the falcon column abuts against the lower horizontal surface of the installation cavity. At this time, there are gaps between the upper inclined surface III of the falcon column and the upper inclined surface IV of the installation cavity, as well as between the lower inclined surface III of the falcon column and the lower inclined surface IV of the installation cavity. The front end of the falcon column can be pulled out of the installation cavity, and the cup plate can also be removed from the horizontal seat, which further improves the convenience of use and disassembly.

[0014] 3. The tooth groove of the rack in the utility model is an isosceles trapezoidal structure, and the front end of the latch is an isosceles trapezoidal structure. The coordinated arrangement fully ensures the upper and lower bidirectional limiting effect of the tooth groove on the latch, which further improves the convenience of use and disassembly and assembly, and further improves the accuracy of height adjustment.

[0015] 4. The upper flange on the outer periphery of the cup tray in the utility model, on the one hand, enables the cup to be accurately placed on the cup tray, and compared with the traditional high-depth cup holder, it is more convenient to place the cup, thereby further improving the convenience of use. On the other hand, it can further prevent the cup from sliding outward under the action of vibration, and the upper flange has the function of blocking the cup from continuing to slide outward, which further improves the safety and reliability of use.

[0016] 5. A through hole is provided at the center of the cup placing plate in the utility model, and a plurality of hollow hole groups are provided on the cup placing plate from the inside to the outside with the through hole as the center. The hollow hole groups are composed of a plurality of arc holes evenly distributed along the circumference. The arrangement of the arc holes in the utility model can not only save materials, but also effectively ensure the stability of the cup placement by utilizing its distribution, improve the anti-slip effect, and further prevent the cup from shifting, which further ensures the reliability and safety of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the utility model;

[0018] Figure 2 It is an explosion diagram of the utility model;

[0019] Figure 3 for Figure 2 A partial enlarged view of the middle A;

[0020] Figure 4 for Figure 2 A partial enlarged view of point B in the middle;

[0021] Figure 5 The working principle of the utility model shift fork is shown in cross-section Figure 1 ;

[0022] Figure 6 The working principle of the utility model shift fork is shown in cross-section Figure 2 ;

[0023] Figure 7 The working principle of the utility model falcon column is shown in cross-section Figure 1 ;

[0024] Figure 8 The working principle of the utility model falcon column is shown in cross-section Figure 2 ;

[0025] Fig. 9 It is a top view schematic diagram of the connection and installation of the cup tray and the mounting seat of the utility model;

[0026] Fig.10 It is a structural schematic diagram of the mounting seat of the utility model;

[0027] In the figure: 1, rack, 11, tooth groove, 2, connecting seat, 21, bolt hole, 3, cup plate, 31, through hole, 32, arc hole, 33, upper flange, 34, lower flange, 4, mounting seat, 41, mounting hole, 42, concave groove, 43, mounting cavity, 431, upper inclined surface IV, 432, upper inclined surface V, 433, lower horizontal surface, 434, lower inclined surface IV, 44, round hole, 5, latch, 51, upper inclined surface I, 52, lower inclined surface I, 53, upper sliding surface, 54, lower sliding surface, 55, rear inclined surface, 6, fork, 61, upper inclined surface II, 62, tail handle, 63, cylinder, 7, falcon column, 71, upper inclined surface III, 72, upper horizontal surface, 73, lower inclined surface II, 74, lower inclined surface III, 8, elastic claw. DETAILED DESCRIPTION

[0028] The following examples are used to further illustrate the content of the utility model, but do not limit the application of the utility model.

[0029] See also Figures 1 to 10, which shows a cup rack, including a rack 1, a cup tray 3, a mounting seat 4 and a latch 5. The upper surface of the cup tray 3 is an inwardly concave arc surface. The cup tray 3 is formed with a through hole 31 and a hollow hole group consisting of a plurality of arc holes 32 uniformly distributed in the circumferential direction. The through hole 31 is opened at the center of the cup tray 3. The hollow hole group is provided with four groups from the inside to the outside with the through hole 31 as the center. The outer edge of the cup tray 3 extends upward and downward to form an upper flange 33 and a lower flange 34, respectively. The upper flange 33 and the lower flange 34 are perpendicular to the cup tray. The outer edge of the cup tray 3 is set, and two falcon columns 7 are fixed on the cup tray 3 (conventional fixing methods such as welding are well known in the art, so they are not explained here), and the falcon columns 7 are symmetrically arranged on both sides of the front end of the cup tray 3 (in this embodiment, the falcon columns 7 are arranged forward and downward relative to the cup tray 3), and two connecting seats 2 are respectively fixed to the upper and lower ends of the rack 1, and screw holes 21 are opened on the connecting seats 2 (the specific orientation of the connecting seat 2 and the specific position of the screw hole 21 can be set as needed).

[0030] Further, the mounting seat 4 is horizontally arranged and a mounting cavity 43 for accommodating the falcon column 7 is formed on the mounting seat 4 in a one-to-one manner (in this embodiment, the mounting cavity 43 is horizontally arranged), the upper surface of the falcon column 7 is an obtuse L-shaped structure and is formed with an upper inclined surface III 71 and an upper horizontal surface 72 (in this embodiment, the upper horizontal surface 72 can be flush with the upper surface of the upper flange 33), the upper inclined surface III 71 and the upper horizontal surface 72 are arranged in sequence from front to back, the top inner wall of the mounting cavity 43 is a V-shaped structure and is formed with an upper inclined surface IV 431 and an upper inclined surface V 432, the upper inclined surface IV 431 and the upper inclined surface V 432 are arranged in sequence from front to back, the upper inclined surface IV 431 and the upper inclined surface III 71 are abutted against each other or leave a gap in a one-to-one manner, and the upper inclined surface Surface V432 and the upper horizontal surface 72 are in one-to-one abutment with or leave a gap. The lower surface of the falcon column 7 is a V-shaped structure and is formed with a lower inclined surface II73 and a lower inclined surface III74. The lower inclined surface II73 and the lower inclined surface III74 are arranged in sequence from front to back. The bottom inner wall of the installation cavity 43 is an obtuse-angle L-shaped structure and is formed with a lower horizontal surface 433 and a lower inclined surface IV434. The lower horizontal surface 433 and the lower inclined surface IV434 are arranged in sequence from front to back. The lower horizontal surface 433 and the lower inclined surface II73 are in one-to-one abutment with or leave a gap. The lower inclined surface IV434 and the lower inclined surface III74 are in one-to-one abutment with or leave a gap. The front end of the falcon column 7 is rotated upward and downward through the corresponding installation cavity 43 to plug in and unplug the mounting seat 4.

[0031] Furthermore, the mounting seat 4 is also formed with a mounting hole 41 and a concave groove 42 that penetrate each other horizontally. The rack 1 is vertically arranged and passes through the mounting hole 41. The concave groove 42 is formed on the side of the mounting seat 4 away from the rack 1 and is arranged in the middle position of the two mounting cavities 43. The latch 5 is arranged inside the concave groove 42 and the front end is arranged directly opposite to the rack 1. The interior of the concave groove 42 is also symmetrically provided with two elastic claws 8 up and down. The front end of the latch 5 is an isosceles trapezoidal structure and is formed with an upper inclined surface Ⅰ51 and a lower inclined surface Ⅰ52. The free ends of the two elastic claws 8 are respectively abutted and matched with the upper inclined surface Ⅰ51 and the lower inclined surface Ⅰ52, and the elastic claws 8 generate a backward thrust on the latch 5. The latch 5 is also formed with an upper sliding surface 53 and a lower sliding surface 54. The upper sliding surface 53 is located at a rear adjacent position of the upper inclined surface Ⅰ51, and the lower sliding surface 54 is located at the lower inclined surface Ⅰ5 2, the upper sliding surface 53 and the lower sliding surface 54 are respectively matched with the top inner wall and the bottom inner wall gap of the concave groove 42 to ensure that the latch 5 can slide back and forth in the concave groove 42. The tooth grooves 11 of the rack 1 are all isosceles trapezoidal structures adapted to the front end of the latch 5. A shift fork 6 is provided below the rear end of the latch 5. The front end of the shift fork 6 is wedge-shaped and formed with an upper inclined surface II 61. A rear inclined surface 55 is formed at the rear end of the latch 5. The upper inclined surface II 61 abuts against the rear inclined surface 55. Two cylinders 63 perpendicular to the fork 6 are respectively provided on both sides of the middle position. The two cylinders 63 are symmetrically arranged and inserted into the two circular holes 44 respectively. A tail handle 62 is formed at the rear end of the fork 6. The upper surface of the tail handle 62 abuts against the lower surface of the cup plate 3. The cup plate 3 generates pressure on the tail handle 62, and this pressure can make the fork 62 rotate.

[0032] The working principle and workflow of this embodiment are as follows (taking coffee preparation as an example):

[0033] During operation, the upper inclined surface III71 of the falcon column 7 abuts against the upper inclined surface IV431 of the installation cavity 43, and the lower inclined surface III74 of the falcon column 7 abuts against the lower inclined surface IV434 of the installation cavity 43. The upper inclined surface III71 and the lower inclined surface III74 of the falcon column 7 firmly bite the falcon column 7, so that the cup tray 3 cannot fall out (such as Figure 7 As shown), at this time, the tail handle 62 of the fork 6 is pressed down by the cup tray 3, so that the fork 6 rotates forward to press against the latch 5, and the front end of the latch 5 is limited up and down by the tooth groove 11 of the rack 1, blocking the mounting seat 4 from moving up and down along the rack 1, and the cup tray 3 is also locked in place (as shown in FIG. Figure 5 as shown).

[0034] In addition, after the cup tray 3 is installed, there are gaps between the upper horizontal surface 72 of the falcon column 7 and the upper inclined surface V432 of the installation cavity 43, and between the lower inclined surface II73 of the falcon column 7 and the lower horizontal surface 433 of the installation cavity 43. These two gaps allow the front end of the falcon column 7 to rotate downward, that is, after the cup tray 3 rotates upward by a certain angle, the falcon column 7 and the cup tray 3 can be smoothly taken out of the mounting seat 4 for cleaning and replacement (such as Figure 8 As shown), the cup tray 3 can also be rotated upward by a certain angle, so that the pressure of the cup tray 3 on the tail handle 62 of the fork 6 disappears, and the pressure of the fork 6 on the latch 5 also disappears, and the elastic claw 8 can push the latch 5 backward, so that the clamping force of the latch 5 on the tooth groove 11 of the rack 1 disappears, and the cup tray 3 and the mounting seat 4 can be directly moved up and down, so as to achieve the height adjustment of the cup tray 3 (as shown). Figure 6 as shown).

[0035] During the whole process, the connecting base 2 is assembled with the coffee machine (not shown) through the bolt hole 21. The upper surface of the cup tray 3 is an inwardly concave arc surface, so that the cup (not shown) placed on the cup tray 3 can be naturally centered under the vibration of the coffee machine. The hollow design formed by the arc-shaped hole 32 of the cup tray 3 can not only save materials and allow the residual coffee liquid to fall from the hollow, but also can utilize the circumferential uniform distribution of the arc-shaped hole 32 to effectively ensure the stability of the cup placement and improve the anti-slip effect. The upper flange 33 of the cup tray 3 is set, so that the cup can be placed on the cup tray more accurately and conveniently, and has the effect of preventing the cup from continuing to slide outward.

Claims

1. A cup holder, comprising a vertical rack, characterized in that: The invention also includes a cup placing plate with an upper surface that is an inwardly concave arc, and a horizontal mounting seat that is sleeved on the rack. A latch is provided in the mounting seat. A fork for positioning the upper and lower limits of its front end in the tooth grooves of the rack is abutted and matched below the rear end of the latch. The front end of the fork is rotatably connected to the inside of the mounting seat. The latch can be self-reset backward. The rear end of the fork is supported under the cup placing plate. Falcon columns are symmetrically fixed on both sides of the front end of the cup placing plate. The front ends of the falcon columns are plugged in and pulled out of the mounting seat by upward and downward limited rotation.

2. The cup holder according to claim 1, characterized in that: The tooth grooves of the rack are all in an isosceles trapezoidal structure.

3. The cup holder according to claim 2, characterized in that: The mounting seat is provided with a mounting hole for the rack to pass through, and a concave groove for accommodating the latch and the fork is formed in the middle of one side of the mounting seat close to the latch, and the concave groove is horizontally connected to the mounting hole. An elastic claw for pushing the latch backward is also provided in the concave groove, and two elastic claws are symmetrically provided above and below.

4. The cup holder according to claim 3, characterized in that: The front end of the latch is in an isosceles trapezoidal structure and is formed with an upper inclined surface I and a lower inclined surface I. The free ends of the two elastic claws are respectively abutted against the upper inclined surface I and the lower inclined surface I. An upper sliding surface is formed at a rear adjacent position of the upper inclined surface I, and a lower sliding surface is formed at a rear adjacent position of the lower inclined surface I. The upper sliding surface and the lower sliding surface are respectively matched with the top inner wall and the bottom inner wall clearance of the concave groove. The front end of the fork is in a wedge-shaped structure and is formed with an upper inclined surface II. The rear end end of the latch is formed with a rear inclined surface abutted against the upper inclined surface II. The rear end of the fork is formed with a tail handle, and the upper surface of the tail handle abuts against the lower surface of the cup tray.

5. The cup holder according to claim 4, characterized in that: Two circular holes are symmetrically provided on the side walls of the concave groove, and two cylindrical columns perpendicular to the fork are symmetrically provided on the two sides of the fork, and the cylindrical columns are inserted into the circular holes one by one.

6. The cup holder according to claim 3, characterized in that: The upper surfaces of the falcon columns are all in an obtuse-angled L-shaped structure and are formed with an upper inclined surface III and an upper horizontal surface from front to back. The lower surfaces of the falcon columns are all in a V-shaped structure and are formed with a lower inclined surface II and a lower inclined surface III from front to back. The mounting seats are formed with mounting cavities for accommodating the falcon columns in a one-to-one manner. The two mounting cavities are symmetrically arranged on both sides of the concave groove. The top inner walls of the mounting cavities are all in a V-shaped structure and are formed with an upper inclined surface IV and an upper inclined surface V from front to back. The bottom inner walls of the mounting cavities are all in an obtuse-angled L-shaped structure and are formed with a lower horizontal surface and a lower inclined surface IV from front to back.

7. The cup holder according to claim 6, characterized in that: The upper inclined surface III and the upper inclined surface IV have a one-to-one abutment fit or a gap fit, the upper horizontal surface and the upper inclined surface V have a one-to-one abutment fit or a gap fit, the lower inclined surface II and the lower horizontal surface have a one-to-one abutment fit or a gap fit, and the lower inclined surface III and the lower inclined surface IV have a one-to-one abutment fit or a gap fit.

8. The cup holder according to claim 1, characterized in that: The outer edge of the cup placing plate vertically extends upward and downward to form an upper flange and a lower flange respectively.

9. The cup holder according to claim 1, characterized in that: A through hole is provided at the center of the cup placing plate, and a plurality of hollow hole groups are provided on the cup placing plate from the inside to the outside with the through hole as the center, and each of the hollow hole groups includes a plurality of arc holes evenly distributed along the circumferential direction.

10. The cup holder according to claim 1, characterized in that: Two connecting seats are respectively fixed to the upper and lower ends of the rack, and screw holes are provided on the connecting seats.

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