Key sealing structure and equipment

Abstract

The utility model is suitable for the key field, and provides a sealing structure and equipment of a key, the sealing structure is used for sealing the key installed in a shell, the sealing structure comprises a key assembly, an axial sealing ring, a radial sealing ring and a support assembly, the support assembly is fixedly installed on the inner wall of the shell, the key assembly is movably installed in the support assembly, and the axial sealing ring and the radial sealing ring are arranged on the support assembly. One end of the key assembly extends to the shell through the support assembly and moves in the axial direction relative to the shell, the key assembly is sleeved with the axial sealing ring and is in interference fit with the axial sealing ring, the axial sealing ring is used for sealing a gap between the support assembly and the key assembly in the axial direction, and the key assembly is sleeved with the radial sealing ring and is in clearance fit with the radial sealing ring. The radial sealing ring is used for sealing a gap between the support assembly and the shell in the radial direction. According to the utility model, axial and radial gaps are respectively sealed, and friction is not generated between the key assembly and the sealing ring in the pressing process, so that the consistency of the pressing force is effectively ensured, and the validity period of the sealing effect is prolonged.

Description

Technical Field

[0001] The utility model belongs to the field of keys, and in particular relates to a sealing structure and equipment of keys. Background Art

[0002] The buttons of existing medical devices generally do not have a waterproof function. When cleaning the device shell, liquids can easily enter the device through the gap between the shell and the buttons, which can seriously cause a short circuit in the circuit board and affect the normal operation of the device. Some devices also add a sealing ring between the button and the shell to increase the waterproof function, but the improved button will rub against the sealing ring during the pressing process, resulting in a jerky pressing feel, poor consistency of pressing force, and a short service life of the sealing ring. Utility Model Content

[0003] The utility model aims to provide a key sealing structure and device, aiming to solve the technical problems of the prior art that the keys are not waterproof, or the waterproof keys have a rough pressing feel and the sealing ring has a short service life.

[0004] The utility model is achieved in this way:

[0005] The utility model first aspect provides a key sealing structure, which is used for key sealing installed in a shell, comprising a key assembly, an axial sealing ring, a radial sealing ring and a bracket assembly, wherein the bracket assembly is fixedly installed on the inner wall of the shell, the key assembly is movably installed in the bracket assembly, one end of the key assembly extends to the shell through the bracket assembly and moves axially relative to the shell, the axial sealing ring is sleeved outside the key assembly and has an interference fit with the key assembly, the axial sealing ring is used to seal the gap between the bracket assembly and the key assembly along the axial direction, the radial sealing ring is sleeved outside the key assembly and has a clearance fit with the key assembly, and the radial sealing ring is used to seal the gap between the bracket assembly and the shell along the radial direction.

[0006] Furthermore, the bracket assembly includes a main bracket and a base plate, the main bracket and the base plate are fixedly connected to form a key accommodating cavity, the upper surface of the main bracket is provided with a through hole, the key assembly includes a keycap, a key and a spring, the shell of the keycap is provided with a spring accommodating cavity and a pressure rod extending axially, the key is fixedly mounted on the base plate and arranged corresponding to the pressure rod, the spring is installed in the spring accommodating cavity, the two ends of the spring are respectively abutted against the base plate and the inner wall of the shell of the keycap, the shell is provided with a mounting hole that passes through the through hole, one end of the keycap is installed in the key accommodating cavity, and the other end of the keycap passes through the through hole and the mounting hole in sequence.

[0007] Furthermore, the pressure rod is a cross column structure extending downward along the inner wall of the shell of the key cap, and the pressure rod is arranged at the center position of the key cap.

[0008] Furthermore, along the direction away from the key, the outer diameter of the shell of the key cap gradually decreases.

[0009] Furthermore, a convex ring is provided on one side of the outer edge of the shell of the key cap close to the key, and the upper and lower surfaces of the axial sealing ring are respectively in contact with the inner wall of the main bracket and the upper surface of the convex ring.

[0010] Furthermore, the convex ring is provided with a positioning groove along the axial direction, and the inner wall of the main bracket is provided with a positioning block corresponding to the positioning groove, and the positioning block is plugged into the positioning groove.

[0011] Furthermore, the upper surface of the key cap is a curved surface.

[0012] Furthermore, the upper surface of the shell is higher than the upper surface of the keycap.

[0013] Furthermore, a boss is provided on the upper surface of the main bracket, the upper surface of the boss abuts against the inner wall of the outer shell, the upper surface of the radial sealing ring abuts against the inner wall of the outer shell, and the side surface of the radial sealing ring abuts against the inner side surface of the boss.

[0014] A second aspect of the present invention provides a device, comprising a housing and a button, wherein the button is installed on the housing through the sealing structure of the button described in any one of the above items.

[0015] The beneficial effect of the utility model is that the utility model seals the axial and radial gaps respectively by providing an axial sealing ring and a radial sealing ring. During the pressing process, the axial sealing ring moves with the key assembly, and the key assembly and the axial sealing ring and the radial sealing ring do not generate friction, which not only effectively ensures the consistency of the pressing force, but also increases the service life of the sealing ring and prolongs the validity period of the sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a cross-sectional view of a sealing structure of a key provided by an embodiment of the utility model;

[0017] Figure 2 It is a schematic diagram of the assembly of the key assembly and the bracket assembly provided in the embodiment of the utility model;

[0018] Figure 3 This is an exploded view of the sealing structure provided by the embodiment of the utility model with the outer shell removed;

[0019] Figure 4 It is a structural schematic diagram of a key cap provided by an embodiment of the utility model;

[0020] Figure 5 It is a structural schematic diagram of the device provided by the embodiment of the utility model.

[0021] 10-housing, 11-mounting hole,

[0022] 20-key assembly, 21-key cap, 211-pressure rod, 212-convex ring, 213-positioning groove, 22-key, 23-spring,

[0023] 30-Axial sealing ring,

[0024] 40- radial sealing ring,

[0025] 50-bracket assembly, 51-main bracket, 511-through hole, 512-positioning block, 513-boss, 52-bottom plate. DETAILED DESCRIPTION

[0026] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0027] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integrated connection, or even a connection that can move relatively; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] In the description of the present invention, the terms "length", "diameter", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on the present invention.

[0029] The direction "far" used in the present invention is the direction toward the patient, and the direction "near" is the direction away from the patient. The terms "up" and "upper part" refer to the general direction away from the direction of gravity, and the terms "bottom", "lower" and "lower part" refer to the general direction of gravity. The term "front" refers to the side of the interventional surgical robot facing the user from the end device, and "forward" refers to the direction in which the guide wire or catheter is displaced into the body of the surgical patient. The term "backward" refers to the side of the interventional surgical robot facing away from the user from the end device, and "backward" refers to the direction in which the guide wire or catheter is displaced out of the body of the surgical patient. The term "inwardly" refers to the internal part of the feature. The term "outwardly" refers to the outside part of the feature. The term "rotation" includes "forward rotation" and "reverse rotation", wherein "forward rotation" refers to the direction in which the guide wire or catheter is rotated into the body of the surgical patient, and "reverse rotation" refers to the direction in which the guide wire or catheter is rotated out of the body of the surgical patient.

[0030] In addition, the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present utility model, "multiple" or "plurality" means two or more.

[0031] Finally, it should be noted that, if there is no conflict, the embodiments of the utility model and the various features in the embodiments can be combined with each other, all within the protection scope of the utility model.

[0032] As attached Figure 1 As shown, a key sealing structure provided by an embodiment of the utility model is used for sealing a key installed in a housing 10. The sealing structure includes a key assembly 20, an axial sealing ring 30, a radial sealing ring 40 and a bracket assembly 50. The bracket assembly 50 is fixedly installed on the inner wall of the housing 10, and the key assembly 20 is movably installed in the bracket assembly 50. The key assembly 20 is installed on the housing 10 through the bracket assembly 50. One end of the key assembly 20 extends to the housing 10 through the bracket assembly 50 and moves axially relative to the housing 10, so that the key assembly 20 can be pressed axially.

[0033] The axial sealing ring 30 is sleeved outside the key assembly 20 and is interference fit with the key assembly 20, that is, the axial sealing ring 30 and the key assembly 20 form an integrated structure after installation. When the device is working normally or in the shutdown state, the axial sealing ring 30 is used to seal the gap between the bracket assembly 50 and the key assembly 20 along the axial direction. During the pressing process of the key assembly 20, the axial sealing ring 30 moves with the key assembly 20, and no friction is generated between the key assembly 20 and the axial sealing ring 30, which not only effectively ensures the consistency of the pressing force, but also improves the service life of the sealing ring and extends the validity period of the sealing effect.

[0034] The radial sealing ring 40 is sleeved outside the key assembly 20 and is in clearance with the key assembly 20, that is, the radial sealing ring 40 is not in direct contact with the key assembly 20, and the key assembly 20 can move relative to the radial sealing ring 40 in the axial direction. The radial sealing ring 40 is used to seal the radial gap between the bracket assembly 50 and the housing 10. During the pressing process of the key assembly 20, since there is no friction between the radial sealing ring 40 and the key assembly 20, it not only effectively ensures the consistency of the pressing force, but also improves the service life of the sealing ring and extends the validity period of the sealing effect.

[0035] This embodiment adopts different sealing methods for the radial and axial gaps of the key assembly 20 based on the actual application of the key assembly 20, that is, the radial sealing ring 40 always keeps the radial gap sealed, and the axial sealing ring 30 seals the axial gap when the device is in normal working or shutdown state, and does not seal in the pressing state. In this way, not only is it ensured that the key assembly 20 and the housing 10 are in a sealed isolation state when the device is in normal working or shutdown state, which can effectively prevent dust and water, but also, during the pressing process, the axial sealing ring 30 and the radial sealing ring 40 will not generate resistance to the axial movement of the key assembly 20, effectively ensuring the consistency of the pressing force.

[0036] As attached Figure 1-3 As shown, the bracket assembly 50 is used to install the button assembly 20. The preferred bracket assembly 50 in this embodiment includes a main bracket 51 and a bottom plate 52. The main bracket 51 is roughly a cover plate structure, and has a hollow portion for accommodating the button assembly 20. The bottom plate 52 is arranged relative to the hollow portion of the main bracket 51. The main bracket 51 and the bottom plate 52 are fixedly connected to form a button accommodating cavity. The main bracket 51 and the bottom plate 52 can be installed and fixed in a variety of detachable ways. A through hole 511 is provided on the upper surface of the main bracket 51. The through hole 511 is connected to the hollow portion, and the button assembly 20 placed in the button accommodating cavity can partially pass through the through hole 511. In order to better fix the radial sealing ring 40, a boss 513 is provided on the upper surface of the preferred main bracket 51 in this embodiment. The boss 513 is annular in structure and extends upward along the upper surface of the main bracket 51. The boss 513 surrounds the outside of the through hole 511 and is arranged coaxially with the through hole 511. The inner side surface of the boss 513 and the upper surface of the main bracket 51 form a mounting position for the radial sealing ring 40. The inner diameter of the boss 513 corresponds to the outer diameter of the radial sealing ring 40. When the main bracket 51 is fixedly installed on the housing 10, the upper surface of the boss 513 abuts against the inner wall of the housing 10, the upper surface of the radial sealing ring 40 abuts against the inner wall of the housing 10, and the side surface of the radial sealing ring 40 abuts against the inner side surface of the boss 513. The radial sealing ring 40 is clamped between the main bracket 51 and the housing 10, which can effectively ensure the sealing between the main bracket 51 and the housing 10 in the radial direction.

[0037] As attached Figure 2 , 3 As shown, the preferred key assembly 20 of this embodiment includes a key cap 21, a key 22 and a spring 23. Figure 4 As shown, the shell of the keycap 21 preferably in this embodiment is provided with a spring accommodating cavity and a pressure rod 211 extending axially, the space of the spring accommodating cavity corresponds to the outer contour of the spring 23, and the pressure rod 211 is arranged in the spring accommodating cavity. In order to better contact with the key 22, the pressure rod 211 preferably in this embodiment is a cross column structure extending downward along the inner wall of the shell of the keycap 21, and the pressure rod 211 is arranged at the center position of the keycap 21. The key 22 is fixedly mounted on the base plate 52 and is arranged corresponding to the pressure rod 211. The spring 23 is installed in the spring accommodating cavity, and the two ends of the spring 23 are respectively in contact with the base plate 52 and the inner wall of the shell of the keycap 21. In the initial state, under the action of the elastic force, the spring 23 supports the keycap 21 upward to separate from the key 22.

[0038] The key assembly 20 is installed as a whole in the bracket assembly 50. The housing 10 is provided with a mounting hole 11 that penetrates the through hole 511 of the main bracket 51. One end of the keycap 21 is installed in the key accommodating cavity of the main bracket 51, and the other end of the keycap 21 passes through the through hole 511 and the mounting hole 11 in sequence. The external force presses the keycap 21 downward, driving the pressure rod 211 to move downward and contact the key 22, and the spring 23 is compressed during this process. When the external force is removed, the spring 23 drives the keycap 21 to move upward during the reset process, and the pressure rod 211 is separated from the key 22. Since the pressing force of the keycap 21 can be controlled by the spring 23, the design requirements of various pressing forces and pressing strokes can be met by adjusting the parameters of the spring 23.

[0039] As attached Figure 4 As shown, in order to better fix the axial sealing ring 30, a convex ring 212 is preferably provided on the side of the outer edge of the shell of the keycap 21 close to the key 22 in this embodiment, and the convex ring 212 extends radially outwardly of the keycap 21, and the upper surface of the convex ring 212 and the outer surface of the keycap 21 form the installation position of the axial sealing ring 30. The width of the convex ring 212 is greater than the width of the axial sealing ring 30, and the inner diameter of the axial sealing ring 30 and the outer diameter of the keycap 21 meet the requirements of interference fit, and the axial sealing ring 30 is sleeved on the keycap 21. When the device is in normal working or shutdown state, the axial sealing ring 30 is sandwiched between the main bracket 51 and the keycap 21 through the action of the spring 23, and the upper and lower surfaces of the axial sealing ring 30 are respectively in contact with the inner wall of the main bracket 51 and the upper surface of the convex ring 212, thereby ensuring the sealing between the main bracket 51 and the keycap 21.

[0040] In order to better achieve the interference fit between the axial sealing ring 30 and the key assembly 20, and the clearance fit between the radial sealing ring 40 and the key assembly 20, in this embodiment, the outer diameter of the shell of the keycap 21 is preferably gradually reduced in the direction away from the key 22, that is, the keycap 21 is roughly in a truncated cone structure. The axial sealing ring 30 of this embodiment is arranged below the radial sealing ring 40, and the axial sealing ring 30 and the radial sealing ring 40 have the same specifications and dimensions. By gradually designing the outer diameter of the shell of the keycap 21, an installation structure with interference fit at the bottom and clearance fit at the top can be naturally formed.

[0041] In order to better assemble the keycap 21 and the main bracket 51, the preferred convex ring 212 of this embodiment is provided with a positioning groove 213 along the axial direction, and the inner wall of the main bracket 51 is provided with a positioning block 512 corresponding to the positioning groove 213. When the keycap 21 is installed on the main bracket 51, the positioning block 512 is plugged into the positioning groove 213. At the same time, the positioning structure can also limit and guide the axial movement of the keycap 21.

[0042] In order to improve the comfort of pressing, the upper surface of the keycap 21 is preferably a curved surface in this embodiment, and the curved surface design is conducive to the keycap 21 to better fit the user's fingertips. In this embodiment, the upper surface of the housing 10 is higher than the upper surface of the keycap 21, which can effectively prevent the user from accidentally touching the keycap 21 when the device is working normally or turned off.

[0043] As attached Figure 1 , 5 As shown, a device provided by an embodiment of the utility model includes a housing 10 and a key, and the key is installed on the housing 10 through the above-mentioned key sealing structure. Specifically, the key assembly 20 is movably installed on the housing 10, and the key cap 21 is in a sealed state when the device is working normally or shut down. When the key cap 21 is pressed downward, the radial sealing ring 40 remains stationary, and the axial sealing ring 30 moves with the key cap 21. During the whole process, the radial sealing ring 40 and the axial sealing ring 30 will not generate friction with the key cap 21, effectively ensuring the consistency of the pressing force.

[0044] Of course, the present invention may have many other embodiments. Without departing from the spirit and essence of the present invention, technicians familiar with the field can make various corresponding changes and deformations based on the present invention, but these corresponding changes and deformations should all fall within the scope of protection of the claims of the present invention.

[0045] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A key sealing structure, used for sealing a key installed in a housing, characterized in that: It includes a button assembly, an axial sealing ring, a radial sealing ring and a bracket assembly, wherein the bracket assembly is fixedly mounted on the inner wall of the shell, the button assembly is movably mounted in the bracket assembly, one end of the button assembly extends to the shell through the bracket assembly and moves axially relative to the shell, the axial sealing ring is sleeved outside the button assembly and has an interference fit with the button assembly, the axial sealing ring is used to seal the axial gap between the bracket assembly and the button assembly, the radial sealing ring is sleeved outside the button assembly and has a clearance fit with the button assembly, and the radial sealing ring is used to seal the radial gap between the bracket assembly and the shell.

2. The sealing structure of a key according to claim 1, characterized in that: The bracket assembly includes a main bracket and a base plate, the main bracket and the base plate are fixedly connected to form a key accommodating cavity, the upper surface of the main bracket is provided with a through hole, the key assembly includes a keycap, a key and a spring, the shell of the keycap is provided with a spring accommodating cavity and a pressure rod extending axially, the key is fixedly mounted on the base plate and arranged corresponding to the pressure rod, the spring is installed in the spring accommodating cavity, the two ends of the spring are respectively abutted against the base plate and the inner wall of the shell of the keycap, the shell is provided with a mounting hole that passes through the through hole, one end of the keycap is installed in the key accommodating cavity, and the other end of the keycap passes through the through hole and the mounting hole in sequence.

3. The key sealing structure according to claim 2, characterized in that: The pressure rod is a cross column structure extending downward along the inner wall of the shell of the key cap, and the pressure rod is arranged at the center position of the key cap.

4. The sealing structure of a key according to claim 2, characterized in that: Along the direction away from the key, the outer diameter of the shell of the key cap gradually decreases.

5. The key sealing structure according to claim 2, characterized in that: A convex ring is provided on one side of the outer edge of the shell of the key cap close to the key, and the upper and lower surfaces of the axial sealing ring are respectively in contact with the inner wall of the main bracket and the upper surface of the convex ring.

6. The sealing structure of a key according to claim 5, characterized in that: The convex ring is provided with a positioning groove along the axial direction, and the inner wall of the main bracket is provided with a positioning block corresponding to the positioning groove, and the positioning block is plugged into the positioning groove.

7. The key sealing structure according to claim 2, characterized in that: The upper surface of the key cap is a curved surface.

8. The key sealing structure according to claim 2, characterized in that: The upper surface of the shell is higher than the upper surface of the key cap.

9. The sealing structure of a key according to claim 2, characterized in that: A boss is provided on the upper surface of the main bracket, the upper surface of the boss abuts against the inner wall of the shell, the upper surface of the radial sealing ring abuts against the inner wall of the shell, and the side surface of the radial sealing ring abuts against the inner side surface of the boss.

10. A device comprising a housing and a button, characterized in that: The key is installed on the housing through the sealing structure of the key according to any one of claims 1-9.

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