CN104727089A - Rotary knob component with self-locking and positioning functions - Google Patents

Abstract

The invention relates to the technical field of washing, in particular to a controller knob assembly of a washing machine and other household appliances with self-locking and positioning functions. The knob assembly includes a knob and a fixed base. The knob is provided with a shaft sleeve, and the fixed base is provided with a positioning sleeve that can be matched with the shaft sleeve. The shaft sleeve is rotatably inserted into the positioning sleeve. The positioning sleeve of the fixed base is provided with claws corresponding to the ring-shaped grooves, and the claws are engaged in the ring-shaped grooves when the shaft sleeve and the positioning sleeve cooperate. The knob component has a simple structure and assembly method, low production cost, and solves the problem of the wobbling and eccentricity of the knob. Preferably, the lower edge of the housing forms a height difference from the top of the boss, even if water enters the gap between the knob and the fixed base, the water will not enter the washing machine. At this time, the knob assembly can simultaneously realize Self-locking, positioning, waterproof function.

Description

A knob assembly with self-locking and positioning functions

technical field

The invention relates to the technical field of washing, in particular to a controller knob assembly of a household appliance such as a washing machine with self-locking and positioning functions.

Background technique

The control panel of the washing machine in the prior art is equipped with a knob for selecting the washing mode or washing time. The knob on the existing washing machine and its positioning device include a knob and a support fixed on the control panel of the washing machine. The shaft sleeve is vertically provided with a guide sleeve on the support, and the shaft sleeve passes through the guide sleeve and is connected with other controllers behind the control panel. In order to facilitate user adjustment, the size of the knob is relatively large, and its axial distance is relatively long, so the length of the shaft sleeve is also relatively long, and the thickness of the support fixed on the control panel is determined according to the thickness of the control panel, which is generally relatively thin. After the shaft sleeve on the knob passes through the guide sleeve and is fixed, the upper part of the shaft sleeve has a long distance and is not guided by the guide sleeve, so the positioning of the support to the knob is insufficient, causing the knob to shake seriously, and the eccentric phenomenon is serious during assembly .

In view of the above problems, there is an urgent need for a knob assembly with self-locking and positioning functions, so as to solve the problems of insufficient knob positioning in the prior art, serious shaking of the knob, and serious eccentricity during assembly.

Contents of the invention

The purpose of the present invention is to provide a knob assembly with self-locking and positioning functions. The knob assembly has a simple structure and assembly method, low production cost, and solves the problem of eccentricity of the knob.

For reaching this purpose, the present invention adopts following technical scheme:

A knob assembly with self-locking and positioning functions, including a knob and a fixed base, the knob is provided with a shaft sleeve, the fixed base is provided with a positioning sleeve that can be matched with the shaft sleeve, and the shaft sleeve is rotatable Inserting into the positioning sleeve, the shaft sleeve is provided with an annular slot. The positioning sleeve is provided with a claw corresponding to the annular slot. When the shaft sleeve and the positioning sleeve are matched, the The claw is engaged in the annular groove.

Preferably, the claw is located on the inner wall of the positioning sleeve.

Preferably, the end of the positioning sleeve is provided with at least one pair of claw arms symmetrically distributed, and each claw arm is provided with one claw.

Preferably, the claw is elastic and triangular in shape, and its cross-sectional area increases along the insertion direction of the bushing. When the bushing pushes inward and contacts the claw, the arm of the pushing claw deforms. When the claw After corresponding to the ring-shaped slot, under the action of the elastic force, the claw arm rebounds so that the claw engages in the ring-shaped slot.

Preferably, the end of the positioning sleeve is provided with two pairs of symmetrically distributed claw arms.

Preferably, the fixed base is provided with a boss, and the positioning sleeve is located at the center of the boss.

Preferably, the knob is provided with a housing, and a groove is provided around the outer circumference of the boss, the lower edge of the housing is matched with the groove, and the lower edge of the housing is matched with the The top ends of the boss form a height difference.

Preferably, the boss is hollow with an open lower end.

Preferably, there is a gap between the boss and the housing.

Preferably, evenly distributed reinforcing ribs are provided on the outer surface of the positioning sleeve.

The beneficial effects of the present invention are: the present invention provides a washing machine with water inlet heating function and its control method. Since the knob is provided with a shaft sleeve, the fixed base is provided with a positioning sleeve that can cooperate with the shaft sleeve, and the shaft sleeve and positioning The cooperation of the sleeve can realize the positioning function of the knob; since the shaft sleeve is provided with a ring-shaped groove, the positioning sleeve is provided with a claw corresponding to the ring-shaped groove, and when the shaft sleeve and the positioning sleeve cooperate The locking function of the knob can be realized by being combined in the annular slot. Therefore, the structure and assembly method of the knob assembly are simple, the production cost is low, and the problem of the eccentricity of the knob shaking is solved. Since a height difference is formed between the lower edge of the housing and the top of the boss, even if a small amount of water enters the gap between the knob and the fixed base, the water will not flow to the controller inside the washing machine. At this time, the knob assembly can simultaneously realize the functions of self-locking, positioning and waterproofing.

Description of drawings

Fig. 1 is a structural schematic diagram of a knob assembly provided by the present invention in an assembled state;

Fig. 2 is a schematic structural view of the upper side of the knob assembly provided by the present invention in a separated state;

Fig. 3 is a structural schematic diagram of the lower side of the knob assembly provided by the present invention in a separated state;

Fig. 4 is a cross-sectional view of the knob assembly provided by the present invention in an assembled state.

in:

1. Knob; 2. Fixed base;

11. Shaft sleeve; 12. Annular slot; 13. Housing;

21. Positioning sleeve; 22. Claw; 23. Claw arm; 24. Boss; 25. Groove; 26. Reinforcing rib.

Detailed ways

The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and through specific implementation methods.

As shown in Figures 1 to 4, the knob assembly includes a knob 1 and a fixed base 2 that can cooperate with the knob 1, the knob 1 is provided with a shaft sleeve 11, and the fixed base 2 is provided with a The positioning sleeve 21 matched with the shaft sleeve 11, the shaft sleeve 11 is rotatably inserted into the positioning sleeve 21, the shaft sleeve 11 is provided with an annular slot 12, and the positioning sleeve of the fixed base 2 The inner wall of 21 is provided with claws 22 corresponding to the annular groove 12 , and the claws 22 are engaged in the annular groove 12 when the shaft sleeve 11 and the positioning sleeve 21 cooperate.

In this solution, when the knob 1 and the fixed base 2 are assembled, the positioning function of the knob assembly is realized through the close cooperation between the shaft sleeve 11 of the knob 1 and the positioning sleeve 21 provided on the fixed base 2 .

In this solution, when the shaft sleeve 11 of the knob 1 is closely matched with the positioning sleeve 21 provided on the fixed base 2, after the shaft sleeve 11 of the above-mentioned knob 1 is inserted into the positioning sleeve 21 provided on the fixed base 2, the shaft sleeve The annular locking groove 12 provided on 11 will meet the claw 22 provided on the positioning sleeve 21, and the annular locking groove 12 and the claw 22 are engaged with each other to realize the self-locking of the knob and the base.

Therefore, the knob assembly adopts a single structural form with self-locking and positioning functions, and has a simple structure and assembly method, low production cost, and solves the problem of shaking and eccentricity of the knob.

In this embodiment, as a preferred solution, the annular locking groove 12 is arranged around the entire outer circumference of the shaft sleeve 11 . The claw 22 is located on the inner wall of the positioning sleeve 21 . The number of the claws 22 is at least two, preferably, it can be three, four, five or more.

In this embodiment, as another preferred solution, the annular locking groove 12 is arranged around the entire outer circumference of the shaft sleeve 11 . The end of the positioning sleeve 21 is provided with at least one pair of claw arms 23 symmetrically distributed, and each claw arm 23 is provided with one claw 22 . In this embodiment, as a preferred solution, a pair of claw arms 23 symmetrically distributed are connected to the end of the positioning sleeve 21 . However, the number of the claw arms 23 can also be 2 pairs, 3 pairs, etc.

In this embodiment, as another preferred solution, the claw 22 is made of elastic material, and its shape is triangular. 22 has a guiding role.

When the shaft sleeve 11 is pushed inward, when it comes into contact with the claw 22, the pushing claw arm 23 deforms, and when the claw 22 corresponds to the annular groove 12, under the action of the elastic force, the claw The claw arm 23 rebounds so that the claw 22 is engaged in the annular groove 12. At this time, because the claw 22 is triangular in shape, its cross-sectional area increases along the insertion direction of the shaft sleeve 11, and the claw 22 will no longer be able to Pulling out from the inside and outside of the ring-shaped slot 12 causes the knob to no longer be pulled out from the fixed base 2 and is in a self-locking state. When it needs to be disassembled, the claw arm 23 can be slightly deformed to both sides internally, and the knob can be pushed out.

In this embodiment, as a preferred solution, the fixed base 2 is provided with a boss 24 , and the back of the boss 24 is provided with a positioning sleeve 21 , and the positioning sleeve 21 is located at the center of the boss 24 .

In this embodiment, as a preferred solution, the knob 1 is provided with a housing 13, and a groove 25 is arranged around the outer circumference of the boss 24, and the lower edge of the housing 13 is in contact with the groove 25. In cooperation, the lower edge of the housing 13 forms a height difference from the top of the boss 24 . Preferably, there is a gap between the boss 24 and the housing 13 .

After the knob 1 is installed on the fixed base 2, the housing 13 of the knob 1 will be sleeved on the boss 24 of the fixed base 2, so that the lower edge of the housing 13 of the knob 1 and the top of the boss 24 A height difference is formed, and even if a small amount of water enters the gap between the boss 24 and the housing 13 during the actual use of the product, the water will only flow away around the boss 24 And can not enter in the hole that knob 1 cooperates with boss 24, can not flow on the controller inside washing machine.

In this embodiment, the boss 24 is hollow with an open bottom.

In this embodiment, in order to strengthen the strength of the positioning sleeve 21 , the outer surface of the positioning sleeve 21 is provided with reinforcing ribs 26 . The reinforcing rib 26 is located in the hollow chamber of the boss 24 . And the reinforcing ribs 26 are preferably evenly distributed.

This solution solves the problem of the eccentricity of the knob by the structure and assembly method of the knob 1 and the fixed base 2 being simple and low in production cost.

The application of this solution on the product will greatly reduce the production cost of the product, improve the use grade of the product and the user experience, and at the same time greatly improve the waterproof safety performance of the product, improve the service life of the product, improve the brand image, and enhance the product in the market. Competitiveness in the same industry.

The above describes the technical principles of the present invention in conjunction with specific embodiments. These descriptions are only for explaining the principles of the present invention, and cannot be construed as limiting the protection scope of the present invention in any way. Based on the explanations herein, those skilled in the art can think of other specific implementation modes of the present invention without creative efforts, and these modes will all fall within the protection scope of the present invention.

Claims (10)

1. A knob assembly with self-locking and positioning functions, including a knob (1) and a fixed base (2), the knob (1) is provided with a shaft sleeve (11), and the fixed base (2) is provided with There is a positioning sleeve (21) that can be matched with the shaft sleeve (11), and the shaft sleeve (11) is rotatably inserted into the positioning sleeve (21). It is characterized in that the shaft sleeve (11) is provided with There is an annular slot (12), the positioning sleeve (21) is provided with a claw (22) corresponding to the annular slot (12), the shaft sleeve (11) and the positioning sleeve (21 ) are matched with each other, and the claw (22) is engaged in the annular groove (12). 2. The knob assembly with self-locking and positioning functions according to claim 1, characterized in that, the claw (22) is located on the inner wall of the positioning sleeve (21). 3. The knob assembly with self-locking and positioning functions according to claim 1, characterized in that, the end of the positioning sleeve (21) is provided with at least one pair of claw arms (23) symmetrically distributed, each One claw (22) is arranged on the claw arm (23). 4. The knob assembly with self-locking and positioning functions according to any one of claims 1 to 3, characterized in that the claw (22) is elastic and triangular in shape, and its cross-sectional area is along the shaft sleeve ( The insertion direction of 11) is increasing. When the bushing (11) pushes inward and contacts the claw (22), the push claw arm (23) deforms. When the claw (22) and the annular groove (12) ) are matched together, under the action of elastic force, the claw arm (23) rebounds so that the claw (22) engages in the annular groove (12). 5. The knob assembly with self-locking and positioning functions according to claim 3, characterized in that, the end of the positioning sleeve (21) is provided with two pairs of symmetrically distributed claw arms (23). 6. The knob assembly with self-locking and positioning functions according to claim 1, characterized in that, the fixed base (2) is provided with a boss (24), and the positioning sleeve (21) is located on the boss The center position of the platform (24). 7. The knob assembly with self-locking and positioning functions according to claim 6, characterized in that, the knob (1) is provided with a housing (13), which is arranged around the outer circumference of the boss (24) There is a groove (25), the lower edge of the housing (13) fits with the groove (25), the lower edge of the housing (13) forms a height with the top of the boss (24) Difference. 8. The knob assembly with self-locking and positioning functions according to claim 6, characterized in that, the boss (24) is hollow with an open lower end. 9. The knob assembly with self-locking and positioning functions according to claim 7, characterized in that there is a gap between the boss (24) and the housing (13). 10. The knob assembly with self-locking and positioning functions according to claim 8, characterized in that, the outer surface of the positioning sleeve (21) is provided with uniformly distributed reinforcing ribs (26).