Switch knob

Abstract

The utility model relates to a switch knob which comprises a cylinder and a connecting middle frame installed in the cylinder, the cylinder is provided with a rear port, the inner circumference of the front end portion of the cylinder is provided with a first limiting step, the front end of the connecting middle frame is provided with at least one buckle matched with the first limiting step, and the front end of the connecting middle frame is installed in the cylinder from the rear port. The buckle swings relative to the radial center of the cylinder body and has a first limiting position where the buckle is located on the first limiting step and a second moving position where the buckle is far away from the first limiting step, and when the buckle is located at the first limiting position, the first limiting step limits the connecting middle frame to move towards the rear port. The connecting middle frame can be installed from the rear end opening of the barrel, when the connecting middle frame is installed in place and the buckle is located at the first limiting position, the first limiting step limits the connecting middle frame to move towards the rear end, and therefore rapid and stable connection of the connecting middle frame and the barrel is achieved, and compared with a traditional mode that a middle frame and the barrel are integrally formed, the process is simpler, and cost is low.

Description

Technical Field

[0001] The utility model relates to the technical field of knobs, in particular to a switch knob. Background Art

[0002] Knobs, also called "hats", can be used in electrical appliances, such as stoves, to turn them on or off or adjust the size by turning the knob.

[0003] The utility model patent with authorization announcement number CN209000801U discloses a knob, in which a bracket is provided in a cylinder, a mounting hole is provided on the bracket, and the bracket and the cylinder are an integral structure. If the bracket and the cylinder are formed as a whole by die-casting or stretching, the process is relatively complicated and the mold opening cost is high. Utility Model Content

[0004] The purpose of the utility model is to provide a switch knob in order to overcome the shortcomings and deficiencies of the prior art.

[0005] The technical solution adopted by the utility model is as follows: a switch knob, comprising a cylinder and a connecting middle frame installed in the cylinder, the cylinder having a rear port, and a first limiting step provided on the inner periphery of the front end of the cylinder.

[0006] The front end of the connecting middle frame is provided with at least one clip that cooperates with the first limiting step. The front end of the connecting middle frame is installed into the cylinder from the rear port. The clip swings relative to the radial center of the cylinder and has a first limiting position in which the clip is located on the first limiting step and a second active position in which the clip is away from the first limiting step. When the clip is in the first limiting position, the first limiting step limits the movement of the connecting middle frame toward the rear port.

[0007] Preferably, a second limiting step is provided on the inner periphery of the rear end portion of the cylinder, and an abutting protrusion is provided on the outer periphery of the rear end of the connecting middle frame to cooperate with the second limiting step. When the buckle is located in the first limiting position, the second limiting step abuts against the abutting protrusion and limits the movement of the connecting middle frame toward the front end of the cylinder.

[0008] Preferably, the cylinder includes a main cylinder portion and a limiting ring portion connected to the inner circumference of the main cylinder portion, the front end of the connecting middle frame passes through the limiting ring portion from the rear port, and the limiting ring portion is located at non-two ends of the main cylinder portion in the axial direction and forms a first limiting step and a second limiting step on its front and rear end surfaces.

[0009] Preferably, the outer circumference of the connecting middle frame is adapted to the size and shape of the inner circumference of the cylinder, and the cylinder is provided with at least one axially extending guide protrusion along its inner circumference, and the outer circumference of the connecting middle frame is correspondingly provided with a guide groove adapted to the shape of the guide protrusion and forming an insert fit therewith.

[0010] Preferably, the inner circumference of the cylinder is provided with at least one group of guide ribs, each guide rib group includes at least one axially extending rib, and the outer circumference of the connecting middle frame is correspondingly provided with guide ribs that are adapted to the shape of the ribs to form an insert fit.

[0011] Preferably, the front end of the connecting middle frame is circumferentially provided with at least the same number of clip mounting grooves as the clips, one end of the clip is connected to the corresponding clip mounting groove, and the cross-sectional size of the clip mounting groove is larger than the clip so that there is a swing gap between the two for the clip to swing.

[0012] Preferably, it also includes a panel, the cylinder has a front port, the front end surface of the connecting middle frame has a support plane, the support plane and the inner periphery of the front end of the cylinder form a panel mounting groove, the panel is located in the panel mounting groove and one end surface thereof is against the support plane.

[0013] Preferably, the distance from the buckle to the front port is not greater than the distance from the supporting plane to the front port.

[0014] Preferably, a rotating member mounting hole is provided at the rear end center of the connecting middle frame.

[0015] Preferably, a plurality of weight-reducing grooves are provided around the rotating member mounting hole at the rear end of the connecting middle frame.

[0016] The beneficial effects of the present invention are as follows: the connecting middle frame can be installed from the rear port of the cylinder. When it is installed in place, when the buckle is in the first limit position, the first limit step limits the movement of the connecting middle frame toward the rear end, thereby realizing a fast and stable connection between the connecting middle frame and the cylinder. Compared with the traditional one-piece molding of the middle frame and the cylinder, the process is simpler and the cost is lower. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, without paying creative labor, other drawings obtained based on these drawings still fall within the scope of the present invention.

[0018] Figure 1 The overall three-dimensional structure of the embodiment of the utility model Figure 1 ;

[0019] Figure 2 This is a three-dimensional structural diagram of the cylinder and the connecting middle frame of the embodiment of the utility model;

[0020] Figure 3 This is a front view structural diagram of the cylinder and the connecting middle frame of the embodiment of the utility model;

[0021] Figure 4 This is a top view of the structure of the cylinder and the connecting middle frame of the embodiment of the utility model;

[0022] Figure 5 for Figure 3 Cross-section at AA in the middle;

[0023] FIG6 is a cross-sectional view taken along line BB in FIG3 ;

[0024] Figure 7 This is a three-dimensional structural diagram of the cylinder of an embodiment of the utility model;

[0025] Figure 8 This is a top view of the cylinder structure of an embodiment of the utility model;

[0026] Figure 9 This is a three-dimensional structural diagram of the middle frame connected in an embodiment of the utility model;

[0027] Figure 10 This is a top view of the structure of the connecting middle frame of the embodiment of the utility model;

[0028] Figure 11 This is a front cross-sectional view of the overall structure of an embodiment of the utility model;

[0029] Figure 12 The overall three-dimensional structure of the embodiment of the utility model Figure 2 ;

[0030] In the figure, 1. cylinder; 2. connecting middle frame; 11. first limiting step; 12. second limiting step; 21. buckle; 22. abutting protrusion; 23. guide groove; 24. guide rib; 25. buckle mounting groove; 26 swing gap; 27. supporting plane; 28. panel mounting groove; 29. ​​rotating part mounting hole; 101. main cylinder part; 102. limiting ring part; 103. rear port; 104. front port; 291. spring clip mounting hole; 292. weight-reducing groove; 1021. guide protrusion; 1022. rib groove. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be described in further detail below with reference to the accompanying drawings.

[0032] It should be noted that all expressions using "first" and "second" in the embodiments of the present invention are for the purpose of distinguishing two non-identical entities or non-identical parameters with the same name. It can be seen that "first" and "second" are only for the convenience of expression and should not be understood as limitations on the embodiments of the present invention. Subsequent embodiments will not explain this one by one.

[0033] The directional and positional terms used in this invention, such as "upper," "lower," "front," "back," "left," "right," "inner," "outer," "top," "bottom," and "side," are used solely to refer to the directions or positions in the accompanying drawings. Therefore, the directional and positional terms used are intended to illustrate and facilitate understanding of this invention and are not intended to limit the scope of protection of this invention.

[0034] like Figures 1 to 7 As shown in the figure, a switch knob in an embodiment of the present utility model comprises a cylinder 1 and a connecting middle frame 2 installed in the cylinder 1. The cylinder 1 has a rear port 103. A first limiting step 11 is provided on the inner periphery of the front end of the cylinder 1.

[0035] The front end of the connecting middle frame 2 is provided with at least one clip 21 that cooperates with the first limiting step 11. The front end of the connecting middle frame 2 is installed into the cylinder 1 from the rear port 103. The clip 21 swings relative to the radial center of the cylinder 1 and has a first limiting position in which the clip 21 is located on the first limiting step 11 and a second active position in which the clip 21 is away from the first limiting step 11. When the clip 21 is in the first limiting position, the first limiting step 11 limits the movement of the connecting middle frame 2 toward the rear port 103.

[0036] Through this arrangement, the connecting middle frame can be installed from the rear port of the cylinder. When installed in place, when the buckle is in the first limit position, the first limit step limits the movement of the connecting middle frame to the rear end, thereby realizing a fast and stable connection between the connecting middle frame and the cylinder. Compared with the traditional one-piece molding of the middle frame and the cylinder, the process is simpler. The middle frame and the cylinder can be made of different materials and integrally molded separately, which is low in cost. The cylinder can specifically use aluminum profiles and other materials with high strength and corrosion resistance. The connecting middle frame can specifically use plastics and other materials with certain deformation ability and high strength.

[0037] A second limiting step 12 is provided on the inner periphery of the rear end portion of the cylinder 1, and an abutting protrusion 22 is provided on the outer periphery of the rear end of the connecting middle frame 2 to cooperate with the second limiting step 12. When the buckle 21 is located in the first limiting position, the second limiting step 12 abuts against the abutting protrusion 22 and limits the connecting middle frame 2 from moving toward the front end of the cylinder 1.

[0038] With this arrangement, the second limiting step is installed in place when it abuts against the abutting protrusion, thereby avoiding excessive installation of the connecting middle frame. Under the joint action of the first and second limiting steps, the axial position of the connecting middle frame connected to the cylinder is stable.

[0039] The cylinder 1 includes a main cylinder portion 101 and a limiting ring portion 102 connected to the inner circumference of the main cylinder portion 101. The front end of the connecting middle frame 2 passes through the limiting ring portion 102 from the rear port 103. The limiting ring portion 102 is located at non-two ends of the main cylinder portion 101 in the axial direction and forms a first limiting step 11 and a second limiting step 12 on its front and rear end surfaces.

[0040] With this arrangement, the first and second limiting steps can be formed by processing the limiting ring portion, which is convenient to process and has a simple structure. The forces of the front and rear limiting structures all act on the limiting ring portion, and the stability is good.

[0041] The outer circumference of the connecting middle frame 2 is adapted to the size and shape of the inner circumference of the cylinder 1. The cylinder 1 is provided with at least one axially extending guide protrusion 1021 along its inner circumference, and the outer circumference of the connecting middle frame 2 is correspondingly provided with a guide groove 23 that is adapted to the shape of the guide protrusion 1021 and forms an insert fit with it.

[0042] Through this arrangement, the cooperation between the guide protrusion and the guide groove plays a guiding role during the installation of the connecting middle frame into the cylinder, thereby improving the convenience of the installation of the connecting middle frame. At the same time, the guide protrusion can limit the circumferential rotation of the connecting middle frame, thereby improving the stability of the circumferential fit. Among them, the outer circumferential surface of the connecting middle frame and the inner circumferential surface of the cylinder are specifically cylindrical / annular surface structures with adaptive shapes, which are highly smooth, thereby further improving the convenience of installation. The outer circumferential surface of the connecting middle frame and the inner circumferential surface of the cylinder can be specifically in the form of a tight fit to further improve the stability of the circumferential fit. The guide protrusion is specifically arranged on the limiting ring portion. Two or more guide protrusions can be symmetrically arranged along the inner circumference of the cylinder to improve the stability of the connection. In this embodiment, three guide protrusions are arranged.

[0043] The inner circumference of the cylinder 1 is provided with at least one group of guide ribs, each of which includes at least one axially extending rib 1022. The outer circumference of the connecting middle frame 2 is correspondingly provided with guide ribs 24 that are adapted to the shape of the ribs 1022 to form an insert fit.

[0044] This arrangement further guides the connection frame during installation into the cylindrical body by means of the guide ribs and grooves, improving ease of installation and limiting circumferential rotation of the connection frame, thereby balancing ease of installation with connection stability. The grooves do not interfere with the positioning of the guide protrusions. In this embodiment, the grooves are located on both sides of the guide protrusions.

[0045] The front end of the connecting middle frame 2 is circumferentially provided with at least the same number of clip mounting grooves 25 as the clips 21. One end of the clip 21 is connected to the corresponding clip mounting groove 25. The cross-sectional size of the clip mounting groove 25 is larger than that of the clip 21, so that there is a swing gap 26 between the two for the clip 21 to swing.

[0046] This arrangement provides a compact structure and reasonable swing space for the buckle, which helps to reduce the overall mass of the knob.

[0047] It also includes a panel 3, the cylinder 1 has a front port 104, the front end surface of the connecting middle frame 2 has a support plane 27, the support plane 27 and the inner periphery of the front end of the cylinder 1 form a panel mounting groove 28, the panel 3 is located in the panel mounting groove 28 and one end surface thereof is against the support plane 27.

[0048] Through this setting, the groove structure formed by connecting the front end face of the middle frame and the inner peripheral wall of the cylinder is used as the installation groove of the panel. The structure is simple and the abutment is stable. At the same time, different types of material processes for the cylinder and the panel can be selected. The panel material can be selected from organic glass, acrylic, etc. The connection between the panel and the panel installation groove can be achieved by bonding, tight fitting or welding.

[0049] The distance between the buckle 21 and the front port 104 is no greater than the distance between the support plane 27 and the front port 104 .

[0050] This arrangement reduces the interference of the buckle on the panel installation. In this embodiment, the distance between the two is equal, so that the end face of the buckle also forms an abutment fit with the panel, further improving the connection stability.

[0051] A rotating member mounting hole 29 is provided at the rear end center of the connecting middle frame 2 .

[0052] The rotating part mounting hole is connected to the spring clip mounting hole 291. When the rotating part of the device, such as the rotating shaft, is installed in the hole, the spring clip can pre-tighten the rotating part, making it more stable and preventing loosening.

[0053] A plurality of weight-reducing grooves 292 are provided around the rotating member mounting hole 29 at the rear end of the connecting middle frame 2 .

[0054] This arrangement further reduces the overall mass of the knob and reduces the cost.

[0055] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the claims of the present invention are still within the scope covered by the present invention.

Claims

1. A switch knob, comprising a cylinder (1) and a connecting middle frame (2) installed in the cylinder (1), characterized in that: The cylinder (1) has a rear port (103), and a first limiting step (11) is provided on the inner periphery of the front end portion of the cylinder (1). The front end of the connecting middle frame (2) is provided with at least one buckle (21) that cooperates with the first limiting step (11). The front end of the connecting middle frame (2) is inserted into the cylinder (1) from the rear port (103). The buckle (21) swings relative to the radial center of the cylinder (1) and has a first limiting position in which the buckle (21) is located on the first limiting step (11) and a second movable position in which the buckle (21) is away from the first limiting step (11). When the buckle (21) is located at the first limiting position, the first limiting step (11) limits the movement of the connecting middle frame (2) toward the rear port (103).

2. The switch knob according to claim 1, characterized in that: A second limiting step (12) is provided on the inner periphery of the rear end portion of the cylinder (1), and an abutting protrusion (22) is provided on the outer periphery of the rear end portion of the connecting middle frame (2) to cooperate with the second limiting step (12). When the buckle (21) is located at the first limiting position, the second limiting step (12) abuts against the abutting protrusion (22) and limits the connecting middle frame (2) from moving toward the front end of the cylinder (1).

3. The switch knob according to claim 2, characterized in that: The cylinder (1) comprises a main cylinder portion (101) and a limiting ring portion (102) connected to the inner circumference of the main cylinder portion (101); the front end of the connecting middle frame (2) passes through the limiting ring portion (102) from the rear port (103); the limiting ring portion (102) is located at non-ends of the main cylinder portion (101) in the axial direction and forms a first limiting step (11) and a second limiting step (12) on the front and rear end surfaces thereof.

4. A switch knob according to claim 1, 2 or 3, characterized in that: The outer circumference of the connecting middle frame (2) is adapted in size and shape to the inner circumference of the cylinder (1); the cylinder (1) is provided with at least one axially extending guide protrusion (1021) along its inner circumference; and the outer circumference of the connecting middle frame (2) is correspondingly provided with a guide groove (23) adapted in shape to the guide protrusion (1021) and forming an insert-fitting fit therewith.

5. A switch knob according to claim 1, 2 or 3, characterized in that: The inner circumference of the cylinder (1) is provided with at least one group of guide rib grooves, each guide rib groove group including at least one axially extending rib groove (1022), and the outer circumference of the connecting middle frame (2) is correspondingly provided with guide ribs (24) that are adapted to the shape of the rib grooves (1022) to form an insert fit.

6. A switch knob according to claim 1, 2 or 3, characterized in that: The front end of the connecting middle frame (2) is circumferentially provided with snap-on mounting grooves (25) having at least the same number as the snap-ons (21), one end of the snap-on mounting groove (25) is connected to the corresponding snap-on mounting groove (25), and the cross-sectional size of the snap-on mounting groove (25) is larger than that of the snap-on mounting groove (21), so that there is a swing gap (26) between the two for the snap-on mounting groove (21) to swing.

7. A switch knob according to claim 1, 2 or 3, characterized in that: It also includes a panel (3), the cylinder (1) has a front port (104), the front end surface of the connecting middle frame (2) has a support plane (27), the support plane (27) and the inner periphery of the front end of the cylinder (1) form a panel mounting groove (28), and the panel (3) is located in the panel mounting groove (28) and one end surface thereof abuts against the support plane (27).

8. The switch knob according to claim 7, characterized in that: The distance between the buckle (21) and the front port (104) is no greater than the distance between the support plane (27) and the front port (104).

9. A switch knob according to claim 1, 2 or 3, characterized in that: A rotating member mounting hole (29) is provided at the rear end center of the connecting middle frame (2).

10. The switch knob according to claim 9, characterized in that: A plurality of weight-reducing grooves (292) are provided around the rotating member mounting hole (29) at the rear end of the connecting middle frame (2).

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