Outer cover of cooking utensil

Abstract

The utility model discloses an outer cover of a cooking utensil, belongs to the technical field of household appliances, solves the problem that a display screen deviates in the installation process due to the fact that no positioning device exists between a display screen support and a cover body, and adopts the technical scheme that the outer cover mainly comprises the cover body, an installation seat and a substrate assembly installed between the cover body and the installation seat, a screen window is arranged on the cover body, the substrate assembly comprises a display screen, a screen support and a circuit board, the circuit board is clamped on the mounting seat, the screen support is fixed on the circuit board, the display screen is mounted on the screen support, the display screen is electrically connected with the circuit board through a metal cable, a first positioning piece is arranged on the cover body, and a second positioning piece is arranged on the screen support. The first positioning piece and the second positioning piece are positioned in an inserted mode and used for enabling the display screen on the screen support to be aligned with the screen window in the cover body, and the installation base is installed on the cover body and fixes the substrate assembly to the cover body in a pressed mode. The utility model is mainly used for facilitating the alignment between the cover body and the display screen.

Description

Technical Field

[0001] The utility model relates to the technical field of household appliances, in particular to an outer cover of a cooking utensil. Background Art

[0002] Cooking appliances such as induction cookers, rice cookers, and pressure cookers usually have display functions, which require a large display interface and visible operation when standing, while also requiring the entire machine to be small in size. Therefore, the display screen of such cooking appliances is generally provided on the outer surface of the cover. It is usually chosen to open a through hole on the outer surface, and the display screen is embedded in the outer surface of the cover through the through hole so that the user can directly view the display screen.

[0003] In the prior art, during the installation of the display screen and the cover body, the display screen may shift in position, which affects the aesthetics of the product and causes light leakage. Utility Model Content

[0004] The utility model aims to provide an outer cover of a cooking utensil to solve the problem of display screen deviation during installation.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: an outer cover of a cooking utensil, comprising a cover body, a mounting seat and a substrate assembly installed between the cover body and the mounting seat, the cover body is provided with a screen window, the substrate assembly comprises a display screen, a screen bracket and a circuit board, the circuit board is snapped onto the mounting seat, the screen bracket is fixed to the circuit board, the display screen is mounted on the screen bracket, the display screen is electrically connected to the circuit board through a metal cable, the cover body is provided with a first positioning piece, the screen bracket is provided with a second positioning piece, the first positioning piece and the second positioning piece are plugged and positioned to align the display screen on the screen bracket with the screen window on the cover body, the mounting seat is installed on the cover body and presses the substrate assembly to fix it to the cover body.

[0006] After adopting the above technical scheme, the utility model has the following advantages: by aligning the display screen on the screen bracket with the screen window on the cover body, the surface of the entire cover body is smoother and has a better aesthetic effect, and the second positioning piece on the screen bracket is plugged and positioned with the first positioning piece on the cover body, so that a direct positioning relationship is generated between the screen bracket and the cover body, so that the display screen installed on the screen bracket is aligned with the screen window of the cover body, which is convenient for workers to align and install the display screen with the screen window, and prevent the display screen from leaking light after direct installation due to the misalignment of the display screen with the screen window.

[0007] Further, the first positioning member is a positioning column, the second positioning member is a positioning hole, and one end of the positioning column is inserted into the positioning hole; or the second positioning member is a positioning column, the first positioning member is a positioning hole, and one end of the positioning column is inserted into the positioning hole.

[0008] Using the above-mentioned technical solution, the first positioning member is a positioning column, and the second positioning member is a positioning hole. The plug-in positioning cooperation between the positioning column and the positioning hole is not only simple in structure, but also easy to operate, and the user can easily realize the positioning function; the second positioning member is a positioning column, and the first positioning member is a positioning hole, which has the same effect as described above.

[0009] Furthermore, the circuit board is provided with a plurality of limiting grooves, and the mounting seat is provided with a plurality of limiting protrusions at positions corresponding to the limiting grooves, the limiting protrusions extend into the limiting grooves, and a gap is provided between the limiting protrusions and the side walls of the limiting grooves.

[0010] By adopting the above-mentioned technical solution, the circuit board can be roughly positioned for the first time through the cooperation of a number of limit grooves on the circuit board and a number of limit protrusions at corresponding positions on the mounting seat to ensure that the circuit board is installed in the specified position. Due to the existence of the gap, the limit grooves and the limit protrusions cooperate to enable the circuit board to be slightly offset on the mounting seat, which facilitates the plug-in positioning cooperation of the first positioning member and the second positioning member for the second precise positioning, and the gap can make the limit protrusion easier to insert relative to the limit groove. When the limit protrusion or the limit groove is slightly deformed or has an error, it can still work normally without causing serious jamming or damage.

[0011] Furthermore, a plurality of the limiting grooves are circumferentially spaced apart on the edge of the circuit board, and the limiting grooves are opened on a side away from the circuit board.

[0012] By adopting the above-mentioned technical solution, the setting of multiple limit grooves can reduce the position offset problem caused by errors or assembly deviations. The limit grooves are set at the edge of the circuit board for easier processing; and the limit grooves are set at circumferential intervals to increase the distance between each limit groove, making the positioning of the limit grooves more accurate. Even if a certain deviation exists in a certain limit groove, the other limit grooves can still ensure the correct installation position of the data board.

[0013] Furthermore, the mounting seat is provided with a plurality of first elastic buckles, which buckle the edges of the circuit board and fix the circuit board to the mounting seat.

[0014] By adopting the above-mentioned technical solution, the circuit board is fixed to the mounting base through the first elastic clip, so as to prevent the circuit board from shifting when the mounting base presses the substrate assembly to the cover body, and the first elastic clip can more conveniently fix the circuit board to the mounting base through its elastic design without the assistance of additional tools. When the circuit board needs to be replaced, the design of the first elastic clip makes it easier and faster to disassemble and replace the circuit board.

[0015] Furthermore, the screen bracket is provided with a plurality of second elastic clips, and the circuit board is provided with a plurality of clip holes adapted to the second elastic clips. The second elastic clips pass through the clip holes and then buckle the circuit board to fix the circuit board to the screen bracket.

[0016] By adopting the above-mentioned technical solution, a plurality of second elastic clips provided on the screen bracket cooperate with the clip holes adapted to the second elastic clips provided on the circuit board, so as to effectively fix the screen bracket to the circuit board, and prevent the screen bracket from shifting when the mounting base presses the substrate assembly to the cover body. Moreover, since the second elastic clips and the clip holes have a relatively simple structure and are easy to disassemble and install, it provides great convenience for later users to replace the circuit board or screen bracket.

[0017] Furthermore, the screen bracket is provided with a screen positioning member for positioning the display screen.

[0018] By adopting the above-mentioned technical solution, the display screen can be effectively limited to a specified position on the screen bracket through the screen positioning piece on the screen bracket, so as to facilitate the alignment of the display screen and the screen window of the cover body at a later time.

[0019] Furthermore, the metal cable is a hard cable, and the metal cable fixes the display screen to the circuit board and is electrically connected to the circuit board.

[0020] With the aforementioned technical solution, since the metal cable is a hard cable, it can not only electrically connect the circuit board and the display screen, but also fix the display screen, further assisting in locating the position of the display screen on the screen bracket.

[0021] Furthermore, a telescopic spring is provided between the circuit board and the cover body, and two ends of the telescopic spring are respectively in contact with the circuit board and the cover body.

[0022] With the aforementioned technical solution, the telescopic springs are respectively in contact with the circuit board and the cover body. The user can transfer the force to the circuit board through the telescopic springs by pressing the outer surface of the cover body, and the circuit board realizes function switching by receiving the force signal.

[0023] Furthermore, the screen bracket is provided with a through hole adapted to the telescopic spring, and the telescopic spring passes through the through hole.

[0024] By adopting the above-mentioned technical solution, a through hole adapted to the telescopic spring is provided on the screen bracket, which can restrict the telescopic spring to a fixed position and prevent the telescopic spring from tilting left and right and causing deviation. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The utility model is further described below in conjunction with the accompanying drawings:

[0026] Figure 1It is an exploded schematic diagram of an outer cover of a cooking utensil according to the utility model;

[0027] Figure 2 is a schematic diagram of the cover structure (I);

[0028] Figure 3 is a schematic diagram of the cover structure (II);

[0029] Figure 4 A schematic diagram of the cooperation between the first positioning member and the second positioning member;

[0030] Figure 5 It is a schematic diagram of the structure of the mounting base and the base assembly;

[0031] Figure 6 for Figure 5 The enlarged schematic diagram at A in the middle;

[0032] Figure 7 for Figure 5 The enlarged schematic diagram of point B in the middle;

[0033] Figure 8 It is a schematic diagram of the circuit board and display screen structure;

[0034] Fig. 9 This is a schematic diagram of the bottom structure of the circuit board;

[0035] Fig.10 for Fig. 9 The enlarged schematic diagram at C in the middle;

[0036] Fig.11 An exploded diagram of the display screen and protective cover on the circuit board;

[0037] In the figure: cover body 1, screen window 11, first positioning member 12, mounting seat 2, limiting protrusion 21, limiting baffle 22, first elastic buckle 23, substrate assembly 3, display screen 31, metal cable 311, display screen 312, protective cover 313, protrusion 3131 screen bracket 32, second positioning member 321, conical guide surface 3211, second elastic buckle 322, screen positioning member 323, through hole 324, circuit board 33, limiting groove 331, clamping hole 332, telescopic spring 4. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments.

[0039] The terms "first", "second", etc. (if any) in the specification and claims of the present utility model are used to distinguish similar objects, rather than to describe a specific order or sequence. Even if "second" is used to distinguish a certain technical feature, it does not necessarily mean that it has "first". It should be understood that in the present utility model, "including" and "having" and any of their variations are intended to cover non-exclusive inclusions. It should be understood that in the present utility model, "multiple" means two or more. "And / or" is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, X and / or Y can represent: X exists alone, X and Y exist at the same time, and Y exists alone. The character " / " generally indicates that the related objects before and after are in an "or" relationship. "Contains X, Y and Z", "Contains X, Y, Z" means that X, Y, and Z are all included, "Contains X, Y or Z" means that one of X, Y, and Z is included, and "Contains X, Y and / or Z" means that any one, any two, or three of X, Y, and Z are included.

[0040] The following specific embodiments are used to describe the technical solution of the utility model in detail. The following specific embodiments can be combined or replaced with each other according to actual conditions, and the same or similar concepts or processes may not be described in detail in some embodiments.

[0041] like Figures 1 to 11 As shown, the utility model provides an outer cover of a cooking utensil, comprising a cover body 1, a mounting base 2 and a substrate assembly 3 installed between the cover body 1 and the mounting base 2, the cover body 1 is provided with a screen window 11, the substrate assembly 3 comprises a display screen 31, a screen bracket 32 ​​and a circuit board 33, the circuit board 33 is snapped onto the mounting base 2, the screen bracket 32 ​​is fixed to the circuit board 33, the display screen 31 is installed on the screen bracket 32, the display screen 31 is electrically connected to the circuit board 33 through a metal cable 311, a first positioning member 12 is provided on the cover body 1, a second positioning member 321 is provided on the screen bracket 32, the first positioning member 12 and the second positioning member 321 are plugged and positioned, so as to align the display screen 31 on the screen bracket 32 ​​with the screen window 11 on the cover body 1, the mounting base 2 is installed on the cover body 1 and presses the substrate assembly 3 to fix it to the cover body 1.

[0042] The utility model makes the surface of the entire cover body 1 smoother and has a better aesthetic effect by aligning the display screen 31 on the screen bracket 32 ​​with the screen window 11 on the cover body 1, and the second positioning member 321 on the screen bracket 32 ​​is plugged and positioned with the first positioning member 12 on the cover body 1, so that a direct positioning relationship is generated between the screen bracket 32 ​​and the cover body 1, so that the display screen 31 installed on the screen bracket 32 ​​is aligned with the screen window 11 of the cover body 1, which is convenient for workers to align and install the display screen 31 with the screen window 11, and prevents light leakage from the display screen 31 after direct installation due to the misalignment of the display screen 31 with the screen window 11.

[0043] It can be understood that the present solution can also be used to assemble the display screen to other positions of the cooking appliance, such as the outer surface of the rice cooker body, by opening a corresponding screen window on the rice cooker body and setting a structure the same as the above solution to achieve direct positioning of the screen window on the cooker body and the display screen, so that the display screen is directly aligned with the screen window on the cooker body during installation.

[0044] Among them, in this embodiment, the display screen 31 includes a display screen 312 connected to the circuit board 33 and a screen protection cover 313 covering the display screen 312. The protection cover 313 can isolate the display screen 312 from the outside world to prevent the display screen 312 from being damaged by water or the like. The protection cover 313 is a transparent protection cover 313. The protection cover 313 is provided with a protrusion 3131 of the same size as the display screen 312 in the opposite direction of the display screen 312. The protrusion 3131 overlaps with the display area of ​​the display screen 312. The screen positioning member 323 provided on the screen bracket 32 ​​is mainly used to position the protection cover 313 on the display screen 312. Three screen positioning members 323 are provided on the screen bracket 32. The screen positioning members 323 are correspondingly arranged at the front end of the protection cover 313 and at two right angles of the front end. Through the screen positioning members 323 on the screen bracket 32, the protection cover 313 is effectively limited at a specified position on the screen bracket 32 ​​to isolate the display screen 312 from the outside world.

[0045] Furthermore, in the present embodiment, in order to further position the display screen 31, the metal cable 311 connected to the display screen 31 is a hard cable, the metal cable 311 is connected to the opposite end of the display screen 31 and the screen positioning member 323, and the metal cable 311 fixes the display screen 31 to the circuit board 33 and is electrically connected to the circuit board 33. Since the metal cable 311 is a hard cable, while electrically connecting the circuit board 33 and the display screen 31, it can also fix the display screen 31, further assisting in positioning the display screen 31 on the screen bracket 32.

[0046] Of course, in other embodiments, the metal cable 311 may also be a soft cable, but an additional screen stopper needs to be installed at the rear end of the screen bracket 32 ​​to fix the position of the display screen 31 so as to fix the position of the display screen 31 on the screen bracket 32 ​​.

[0047] In the present technical solution, the display screen 31 is first positioned by installing the display screen 31 on the circuit board 33, such as by welding or other installation means, so as to facilitate the alignment between the display screen 31 and the cover body 1. The staff first fixes the display screen 31 on the screen bracket 32, and fixes the display screen at a specified position on the screen bracket 32 ​​through the connection relationship between the circuit board 33 and the display screen 31. Then, the installation between the display screen 31 and the cover body 1 is secondly positioned by plugging and fitting the first positioning member 12 and the second positioning member 321. The display screen 31 can be effectively fixed to the cover body 1 through two positionings, so that the workers can conveniently install the display screen 31 on the cover body 1, and reduce the steps of additionally adjusting the position of the display screen 31 in order to align the screen window on the cover body 1 during the installation process. In particular, due to the presence of the first positioning member 12 and the second positioning member 321, the engineering defects caused by the deviation of the display screen 31 can be prevented.

[0048] In this embodiment, the first positioning member 12 is arranged on the side of the cover body 1 facing the screen bracket 32, that is, the bottom of the cover body 1. The first positioning member 12 is two positioning columns, and the top of the positioning column is conical. The second positioning member 321 is two positioning holes set on the screen bracket 32. The positioning hole has a conical guide surface 3211, which is convenient for guiding the positioning column into the positioning hole to achieve plug-in fixation. The plug-in positioning cooperation between the positioning column and the positioning hole is not only simple in structure, but also easy to operate, and the user can easily realize the positioning function.

[0049] In another embodiment, the second positioning member 321 is a positioning column, and the first positioning member 12 is a positioning hole. That is, contrary to the above embodiment, the positioning column is arranged on the screen bracket 32, and the positioning hole is arranged at the bottom of the cover body 1. The positioning effect of the above embodiment can also be achieved, but in this embodiment, the thickness of the cover body 1 needs to be increased to form the positioning hole.

[0050] Specifically, a plurality of limiting grooves 331 are provided on the circuit board 33, and limiting protrusions 21 matched with the limiting grooves 331 are provided at positions corresponding to the limiting grooves 331 of the mounting seat 2, the limiting protrusions 21 extend into the limiting grooves 331, and a gap is provided between the limiting protrusions 21 and the side walls of the limiting grooves 331; by cooperating between the limiting grooves 331 on the circuit board 33 and the limiting protrusions 21 at corresponding positions on the mounting seat 2, the circuit board 33 can be roughly positioned for the first time to ensure that the circuit board 33 is installed at the specified position; due to the existence of the gap, the limiting grooves 331 cooperate with the limiting protrusions 21, so that the circuit board 33 can be slightly offset on the mounting seat, which facilitates the plug-in positioning cooperation of the first positioning member 12 and the second positioning member 321 for the second precise positioning; and the gap can make the limiting protrusions 21 easier to insert relative to the limiting grooves 331, and when the limiting protrusions 21 or the limiting grooves 331 are slightly deformed or have errors, they can still work normally without causing serious jamming or damage.

[0051] Among them, several limit grooves 331 are circumferentially spaced at the edge of the circuit board 33. The limit grooves 331 are set at the edge of the circuit board 33 for easier processing; and the limit grooves 331 are set circumferentially at intervals, which can increase the distance between each limit groove 331, so that the positioning of the limit grooves 331 is more accurate, and the limit grooves 331 are set away from the opening on one side of the circuit board 33. Multiple limit grooves 331 are set at the edge of the circuit board 33 to reduce the position offset problem caused by errors or assembly deviations. Even if a certain limit groove 331 has a certain deviation, the other limit grooves 331 can still ensure the correct installation position of the data board.

[0052] It is worth noting that in the present embodiment, in addition to the limiting protrusion 21 for positioning the circuit board 33, the mounting seat 2 is provided with a limiting baffle 22 extending horizontally toward the center of the mounting seat 2 at the rear of the mounting seat 2. Since the surrounding edges of the mounting seat 2 are upwardly protruding, when the circuit board 33 is installed in the mounting seat 2, the limiting protrusion 21 can only limit the circuit board 33 from horizontal displacement in the mounting seat 2, but cannot prevent the circuit board 33 from moving in the axial direction. The circuit board 33 has the risk of falling out of the mounting seat 2, and the setting of the limiting baffle 22 can effectively prevent the circuit board 33 from falling out of the mounting seat 2; so that the staff can perform the next step of fixing the circuit board 33; due to the existence of the limiting baffle 22, when the circuit board 33 is installed in the mounting seat 2, the circuit board 33 needs to be inserted into the mounting seat 2 at an angle, and when the rear end of the circuit board 33 is lower than the limiting baffle 22, the circuit board 33 is adjusted to a horizontal state and the limiting groove 331 on the circuit board 33 is aligned with the limiting protrusion 21 on the mounting seat 2.

[0053] In this embodiment, in order to further prevent the circuit board 33 from falling off the mounting base 2, a plurality of first elastic buckles 23 are further provided on the mounting base 2. The first elastic buckles 23 buckle the edges of the circuit board 33 and fix the circuit board 33 to the mounting base 2. The circuit board 33 is fixed to the mounting base 2 by the first elastic buckles 23 to prevent the circuit board 33 from shifting when the mounting base 2 presses and fixes the substrate assembly to the cover body 1. The first elastic buckles 23 can more conveniently fix the circuit board 33 to the mounting base 2 through their own elastic design without the need for additional tools. When the circuit board 33 needs to be replaced, the design of the first elastic buckles 23 makes it easier and faster to disassemble and replace the circuit board 33.

[0054] In other embodiments, the circuit board 33 and the mounting base 2 may also be fixed by bolts, and the staff may remove and fix the circuit board 33 by screwing the bolts.

[0055] Among them, two second elastic clips 322 are provided at the bottom of the screen bracket 32, and two clip holes 332 adapted to the second elastic clips 322 are provided on the circuit board 33. The second elastic clips 322 pass through the clip holes 332 and then buckle the circuit board 33, and fix the circuit board 33 to the screen bracket 32 ​​to prevent the position of the screen bracket 32 ​​from shifting when the mounting base 2 presses and fixes the substrate assembly to the cover body 1. Through the cooperation of the plurality of second elastic clips 322 provided on the screen bracket 32 ​​and the clip holes 332 adapted to the second elastic clips 322 provided on the circuit board 33, the screen bracket 32 ​​and the circuit board 33 are effectively fixedly connected. In addition, since the second elastic clips 322 and the clip holes 332 have a relatively simple structure and are easy to disassemble and install, it provides great convenience for later users to replace the circuit board 33 or the screen bracket 32.

[0056] Specifically, eight telescopic springs 4 are provided between the circuit board 33 and the cover body 1, and eight through holes 324 adapted to the telescopic springs 4 are provided on the screen bracket 32. Each telescopic spring 4 passes through the through hole 324 matched therewith, and both ends of each individual telescopic spring 4 are respectively abutted against the circuit board 33 and the cover body 1; the user presses the outer surface of the cover body 1 to compress the telescopic spring 4 and transmit force to the circuit board 33; the circuit board 33 is provided with a sensor at the position corresponding to the telescopic spring 4, which receives the signal from the telescopic spring 33 and makes functional feedback to realize the switching of the cooking function; and the screen bracket 32 ​​is provided with a through hole 324 adapted to the telescopic spring 4, which can limit the telescopic spring 4 to a fixed position and prevent the telescopic spring 4 from tilting left and right and causing displacement.

[0057] In addition to the above-mentioned preferred embodiments, the present invention also has other implementation modes. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative work are within the scope of protection requested by the present invention.

Claims

1. An outer cover of a cooking utensil, characterized in that: The invention comprises a cover body, a mounting seat and a substrate assembly installed between the cover body and the mounting seat, wherein the cover body is provided with a screen window, and the substrate assembly comprises a display screen, a screen bracket and a circuit board, wherein the circuit board is snap-connected to the mounting seat, the screen bracket is fixed to the circuit board, the display screen is mounted on the screen bracket, the display screen is electrically connected to the circuit board via a metal cable, a first positioning member is provided on the cover body, and a second positioning member is provided on the screen bracket, the first positioning member and the second positioning member are plugged and positioned to align the display screen on the screen bracket with the screen window on the cover body, and the mounting seat is installed on the cover body and presses and fixes the substrate assembly to the cover body.

2. The outer cover of a cooking utensil according to claim 1, characterized in that: The first positioning member is a positioning column, the second positioning member is a positioning hole, and one end of the positioning column is inserted into the positioning hole; or the second positioning member is a positioning column, the first positioning member is a positioning hole, and one end of the positioning column is inserted into the positioning hole.

3. The outer cover of a cooking utensil according to claim 1, characterized in that: The circuit board is provided with a plurality of limiting grooves, and the mounting seat is provided with a plurality of limiting protrusions at positions corresponding to the limiting grooves. The limiting protrusions extend into the limiting grooves, and a gap is provided between the limiting protrusions and the side walls of the limiting grooves.

4. The outer cover of a cooking utensil according to claim 3, characterized in that: A plurality of the limiting grooves are arranged at circumferential intervals on the edge of the circuit board, and the limiting grooves are opened on one side away from the circuit board.

5. The outer cover of a cooking utensil according to claim 3, characterized in that: The mounting seat is provided with a plurality of first elastic buckles, which buckle the edges of the circuit board and fix the circuit board to the mounting seat.

6. The outer cover of a cooking utensil according to any one of claims 1 to 5, characterized in that: The screen bracket is provided with a plurality of second elastic clips, and the circuit board is provided with a plurality of clip holes adapted to the second elastic clips. The second elastic clips pass through the clip holes and then buckle with the circuit board, thereby fixing the circuit board to the screen bracket.

7. The outer cover of a cooking utensil according to any one of claims 1 to 5, characterized in that: The screen bracket is provided with a screen positioning piece for positioning the display screen.

8. The outer cover of a cooking utensil according to any one of claims 1 to 5, characterized in that: The metal cable is a hard cable, and the metal cable fixes the display screen to the circuit board and is electrically connected to the circuit board.

9. The outer cover of a cooking utensil according to any one of claims 1 to 5, characterized in that: A telescopic spring is arranged between the circuit board and the cover body, and two ends of the telescopic spring are respectively in contact with the circuit board and the cover body.

10. The outer cover of a cooking utensil according to claim 9, characterized in that: The screen bracket is provided with a through hole adapted to the telescopic spring, and the telescopic spring passes through the through hole.

Images