Spring door shaft

Abstract

A spring door shaft comprises a base, an installation hole is formed in the end face of the base, a spring pin shaft is installed in the installation hole in an axial sliding mode, a spring is installed between the base and the spring pin shaft, the spring pushes the spring pin shaft outwards all the time, so that the head of the spring pin shaft protrudes out of the installation hole, and a fixing plate is further installed on the end face of the base. A guide hole is formed in the fixing plate, and the spring pin shaft penetrates through the guide hole and extends outwards; a limiting device is further arranged on the spring pin shaft and located on the inner side of the fixing plate to limit the axial displacement stroke of the spring pin shaft. The spring door shaft has the advantages that the spring door shaft is simple in design structure, and most assembling procedures can be completed in advance when the spring door shaft leaves a factory through reasonable combination of the base, the spring pin shaft, the spring and the fixing plate.

Description

Technical Field

[0001] The utility model relates to a hardware accessory, in particular to a spring door shaft. Background Art

[0002] With the advancement of science and technology and the improvement of people's living standards, ovens, as a common household appliance, are increasingly used in households, catering and industrial fields. The main function of an oven is to bake or heat food through heating elements. Therefore, its sealing and the opening and closing design of the door are crucial to the baking effect and safety. The door of an oven is usually connected to the main body of the oven through a hinge or door shaft assembly. Such a design must ensure the stability of the door and facilitate users to easily open and close the oven door. With the popularity of ovens in various scenarios, its door shaft design has gradually exposed some problems, affecting the user experience and safety performance of the oven.

[0003] Most existing oven door shaft designs use a method of upper and lower shafts to enable the oven door to rotate around a certain axis to open and close. However, this type of traditional design has the following shortcomings in actual use, affecting the convenience, durability and safety of the oven.

[0004] At present, the door axis structure of some ovens is to install the movable rotating shaft from the inside of the oven door panel to the top plate. Although this structural design can ensure the opening and closing of the door to a certain extent, its installation process is relatively cumbersome. Usually, the oven door panel and door axis assembly need to be installed on site, and the factory cannot assemble them as a whole before shipping. When installing, the user must first install the door axis in place, and then connect the oven door to the oven body, which not only increases the difficulty of installation, but also increases the factory's manufacturing and logistics costs.

[0005] Another common design is to insert the door hinge assembly from the oven top plate downwards. Although this structure simplifies some installation steps, when the oven door or door hinge is damaged, since the oven is usually embedded in the kitchen or commercial equipment, disassembly and repair becomes very difficult. It is often necessary to dismantle the entire oven to replace the door hinge assembly, which increases maintenance costs and operational difficulty.

[0006] In the existing oven door shaft design, the door shaft is usually inserted into the shaft hole of the oven base through the lower shaft to support the opening and closing of the oven door. However, due to a certain matching gap between the shaft hole and the lower shaft, this will cause the oven door to shake when opening or closing. Especially after repeated use, as the friction between the door shaft and the shaft hole increases, the shaking phenomenon will become more obvious, affecting the sealing performance of the oven door, and thus having a negative impact on the baking effect and user experience.

[0007] To reduce wobbling, some oven designs fasten the lower shaft tightly within the shaft hole. However, while this structure can reduce the wobbling of the oven door, it also generates significant frictional force, making it more laborious to open and close the oven door, increasing the operation difficulty. Additionally, excessive friction may exacerbate the wear of the door shaft, shortening the service life of the oven door shaft.

[0008] During the long-term use of the oven door shaft, the contact surface between the door shaft and the shaft hole will experience wear due to frequent opening and closing operations. This wear not only affects the smooth opening and closing of the oven door but also increases the frictional force between the oven door and the oven body, making it strenuous for users to operate the oven door. Meanwhile, the high-temperature environment inside the oven accelerates the material aging and deformation of the door shaft and the shaft hole, thereby reducing the durability of the door shaft assembly. As the frictional force increases, the fit between the door shaft and the shaft hole becomes less tight, further decreasing the sealing performance of the oven door, which not only affects the use performance of the oven but also poses certain safety hazards. Therefore, it is necessary to make further improvements. Summary of the Utility Model

[0009] The purpose of the present utility model is to overcome the shortcomings of the existing technology and provide a spring door shaft with a simple structure, convenient use, small frictional force, easy maintenance, and improved use performance and user experience of the oven.

[0010] The purpose of the present utility model is achieved in the following way: A spring door shaft includes a base. An installation hole is provided on the end face of the base. A spring pin shaft is axially slidably installed within the installation hole. A spring is installed between the base and the spring pin shaft. The spring always pushes the spring pin shaft outward, causing the head of the spring pin shaft to protrude outside the installation hole. A fixing plate is also installed on the end face of the base. A guiding hole is installed on the fixing plate. The spring pin shaft extends outward through this guiding hole. A limiting device is further provided on the spring pin shaft. The limiting device is located inside the fixing plate to limit the axial displacement stroke of the spring pin shaft.

[0011] Further: The limiting device is a convex ring provided on the cylindrical surface of the spring pin shaft.

[0012] Further: The limiting device is a convex platform provided on the cylindrical surface of the spring pin shaft.

[0013] Further: The limiting device is a convex point provided on the cylindrical surface of the spring pin shaft.

[0014] Further: The spring is sleeved on the cylindrical surface of the spring pin shaft. One end of the spring is pressed against the limiting device, and the other end is pressed against the installation hole.

[0015] Further: The installation hole is a blind hole provided on the base.

[0016] Further: The installation hole is a through hole provided on the base, and the tail of the spring pin extends backward out of the through hole.

[0017] Further: An installation seat is provided on the end face of the base. Correspondingly, the fixing plate is covered and installed on the installation seat.

[0018] Further: A number of fixing holes are provided on the installation seat, and positioning holes are provided on the fixing plate. The fixing screws pass through the positioning holes and are screwed and fixed with the fixing holes.

[0019] Further: A number of elastic buckles extend backward from the back of the fixing plate. Correspondingly, a number of positioning grooves are provided on the installation seat. The fixing plate is positioned and installed by buckling the elastic buckles in the positioning grooves.

[0020] The beneficial effects of the present utility model are as follows: 1. The structure is simple, the production cost is low, and the market competitiveness is improved.

[0021] 2. The spring door shaft provided by the present utility model has a simple design structure. Through the reasonable combination of the base, the spring pin, the spring and the fixing plate, most of the assembly processes can be pre-completed at the factory. Compared with the complex installation steps in the prior art, the spring pin in the present utility model realizes precise positioning through the guide hole, reduces the difficulty of on-site installation, and the user can complete the installation of the door shaft with simple operations, saving time and labor.

[0022] 3. The present utility model designs a reasonable limiting device, which can effectively limit the axial displacement stroke of the spring pin. The limiting device is provided on the cylindrical surface of the spring pin in the form of a convex ring, a convex platform or a convex point, preventing the pin from excessive displacement during operation. This design significantly improves the stability of the door shaft, avoids the shaking of the door panel when opening or closing, and ensures the smooth operation of the door.

[0023] 4. The spring pin is always in an outward stressed state by the thrust of the spring. The elastic force of the spring can automatically push the pin, so that the door can be tightly connected with the box body to avoid shaking.

[0024] 5. The present utility model avoids excessive friction between the spring pin and other components through reasonable design. Especially through the appropriate clearance design and the application of the guide hole, it ensures that the pin can move smoothly during the movement process, reducing the wear of the components. Compared with the problem of increased friction due to fastening in the prior art, the present utility model significantly reduces the friction and extends the service life of the door shaft and its related components. Description of the Drawings

[0025] Figure 1 It is the overall assembly usage effect diagram of the first embodiment of the present utility model.

[0026] Figure 2This is a structural sectional view of the first embodiment of the present utility model.

[0027] Figure 3 This is an exploded view of the structure of the first embodiment of the present utility model.

[0028] Figure 4 This is the overall assembly usage effect diagram of the second embodiment of the present utility model.

[0029] Figure 5 This is a structural sectional view of the second embodiment of the present utility model.

[0030] Figure 6 This is an exploded view of the structure of the second embodiment of the present utility model. Detailed implementation manners

[0031] The following further specifically describes the present utility model in conjunction with the accompanying drawings. A spring door shaft includes a base 1. An installation hole 11 is provided on the end face of the base 1. A spring pin shaft 2 is axially slidably installed in the installation hole 11. A spring 3 is installed between the base 1 and the spring pin shaft 2. The spring 3 always pushes the spring pin shaft 2 outwards, so that the head of the spring pin shaft 2 protrudes outside the installation hole 11. A fixing plate 4 is further installed on the end face of the base 1. A guiding hole 41 is installed on the fixing plate 4. The spring pin shaft 2 passes through the guiding hole 41 and extends outwards; A limiting device 21 is further provided on the spring pin shaft 2. The limiting device 21 is located inside the fixing plate 4 to limit the axial displacement stroke of the spring pin shaft 2.

[0032] In one embodiment, the limiting device 21 is a convex ring provided on the cylindrical surface of the spring pin shaft 2.

[0033] In one embodiment, the limiting device 21 is a convex platform provided on the cylindrical surface of the spring pin shaft 2.

[0034] In one embodiment, the limiting device 21 is a convex point provided on the cylindrical surface of the spring pin shaft 2.

[0035] In one embodiment, the spring 3 is sleeved on the cylindrical surface of the spring pin shaft 2. One end of the spring 3 abuts against the limiting device 21, and the other end abuts against the inside of the installation hole 11.

[0036] In one embodiment, the installation hole 11 is a blind hole provided on the base 1. The tail of the spring directly bears on the bottom of the blind hole.

[0037] In one embodiment, the installation hole 11 is a through hole provided on the base 1. The tail of the spring pin shaft 2 extends backwards out of the through hole. When it is set as a through hole, a positioning step is provided on the inner wall of the through hole, and the tail of the spring bears on the positioning step.

[0038] In one embodiment, an installation seat 12 is provided on the end face of the base 1. Correspondingly, the fixing plate 4 is covered and installed on the installation seat 12. The installation seat and the base are integrally injection-molded from a plastic material. The installation seat protrudes from the contour of the base, aiming to increase the connection area and thus enhance the bearing capacity.

[0039] In one embodiment, a plurality of fixing holes 13 are provided on the installation seat 12, and positioning holes 42 are provided on the fixing plate 4. Fixing screws pass through the positioning holes 42 and are screwed and fixed with the fixing holes 13.

[0040] In one embodiment, a plurality of elastic buckles 43 extend backward from the back of the fixing plate 4. Correspondingly, a plurality of positioning grooves 14 are provided on the installation seat 12. The fixing plate 4 is positioned and installed in the positioning grooves 14 by buckling the elastic buckles 43. During installation, since the spring always pushes the spring pin shaft and the fixing plate outward, it is difficult to install the screws. Therefore, the elastic buckle design in this case enables quick positioning through the elastic buckle and the positioning pin during installation, and then the fixing screws are installed. This can achieve the quick and convenient installation of the fixing screws and avoid being affected by the spring.

[0041] Working principle: In the structure of the present utility model, the spring pin shaft 2 is installed on the base 1 in an axially sliding manner. An installation hole 11 is provided on the end face of the base. The spring 3 is installed between the spring pin shaft 2 and the base 1 and is sleeved on the column surface of the pin shaft. The spring 3 is always in a compressed state, and one end of it abuts against the installation hole 11, and the other end abuts against the spring pin shaft 2, continuously pushing the spring pin shaft outward, so that the head of the pin shaft protrudes outside the installation hole.

[0042] When the user uses it, the door shaft is installed on the cabinet door. When the cabinet door is installed on the cabinet body, an external force is applied to push the door body, and the spring pin shaft bears on the cabinet body, and the spring is further compressed, and the spring pin shaft retracts axially inward. When the spring pin shaft is displaced to the door hole on the cabinet body, the elastic force of the spring pushes the spring pin shaft back to its original position, so that the spring pin shaft is inserted into the door hole, realizing the docking between the door body and the cabinet body.

[0043] Among them, in order to prevent the spring pin shaft from undergoing excessive displacement during the opening and closing of the door, the present utility model designs a limiting device 21. The limiting device can be a convex ring, a convex platform or a convex point provided on the column surface of the spring pin shaft and is installed inside the fixing plate 4. When the spring pin shaft slides, the design of the limiting device can accurately limit its axial movement range, ensuring that the spring pin shaft does not come out or move excessively after reaching the maximum stroke. At the same time, the other side of the limiting device contacts the spring to transmit power.

[0044] Among them, the fixing plate 4 is installed on the end face of the base 1, and a guiding hole 41 is provided on the fixing plate. The spring pin shaft 2 passes through the guiding hole and extends outwards. The function of the guiding hole is to provide an accurate sliding path for the spring pin shaft, so that the movement of the pin shaft is always within a stable track, thereby preventing friction or jamming caused by inaccurate sliding paths. In order to further improve the connection strength between the spring pin shaft and the base, a guiding ring 5 is embedded in the base, and the spring pin shaft is sleeved in the guiding ring, so that the power of the spring pin shaft can be transmitted to the base more evenly and stably.

[0045] Furthermore, in order to provide sufficient supporting force for the spring pin shaft, as Figures 4 - 6 shown, the installation hole 11 is a through hole provided on the base 1, and the tail of the spring pin shaft 2 extends backward out of the through hole. Therefore, both the head and tail ends of the spring pin shaft are restricted within the base. Among them, corresponding docking holes can also be provided on the door body. After the tail of the spring pin shaft passes through the through hole on the base, it is connected to the docking hole on the door body, so that the power of the spring pin shaft can be directly transmitted to the door body through the docking hole, thereby enabling the door shaft to have stronger supporting force, and part of the power is directly transmitted to the door body through the spring pin shaft, which can effectively reduce the load-bearing requirement on the base, thereby extending its service life.

[0046] In summary, through reasonable structural design, the spring door shaft of the present utility model realizes the automatic reset, stability control and durability improvement of the spring pin shaft. It has the advantages of light operation, stable structure, reduced friction, strong adaptability and convenient maintenance, and can effectively overcome the deficiencies in the prior art, thereby improving the opening and closing experience and service life of the door body.

[0047] The above shows and describes the basic principles, main features and advantages of the present utility model. Those skilled in the art of this industry should understand that the present utility model is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed.

Claims

1. A spring door hinge, characterized in that: It includes a base (1). An installation hole (11) is provided on the end face of the base (1). A spring pin shaft (2) is axially slidably installed in the installation hole (11). A spring (3) is installed between the base (1) and the spring pin shaft (2). The spring (3) always pushes the spring pin shaft (2) outwards, so that the head of the spring pin shaft (2) protrudes out of the installation hole (11). An fixing plate (4) is also installed on the end face of the base (1). A guiding hole (41) is installed on the fixing plate (4). The spring pin shaft (2) extends outwards through the guiding hole (41). A limiting device (21) is also provided on the spring pin shaft (2). The limiting device (21) is located inside the fixing plate (4) to limit the axial displacement stroke of the spring pin shaft (2).

2. A spring door hinge according to claim 1, characterized in that: The limiting device (21) is a convex ring provided on the cylindrical surface of the spring pin shaft (2).

3. A spring door hinge according to claim 1, characterized in that: The limiting device (21) is a convex platform provided on the cylindrical surface of the spring pin shaft (2).

4. A spring door hinge according to claim 1, characterized in that: The limiting device (21) is a convex point provided on the cylindrical surface of the spring pin shaft (2).

5. A spring door hinge according to any one of claims 1-4, characterized in that: The spring (3) is sleeved on the cylindrical surface of the spring pin shaft (2). One end of the spring (3) is pressed against the limiting device (21), and the other end is pressed inside the installation hole (11).

6. A spring door hinge according to claim 1, characterized in that: The installation hole (11) is a blind hole provided on the base (1).

7. A spring door hinge according to claim 1, characterized in that: The installation hole (11) is a through hole provided on the base (1). The tail of the spring pin shaft (2) extends backwards out of the through hole.

8. A spring door hinge according to claim 1, characterized in that: An installation seat (12) is provided on the end face of the base (1). Correspondingly, the fixing plate (4) covers and is installed on the installation seat (12).

9. A spring door hinge according to claim 8, characterized in that: A number of fixing holes (13) are provided on the installation seat (12). A positioning hole (42) is provided on the fixing plate (4). A fixing screw passes through the positioning hole (42) and is screwed and fixed with the fixing hole (13).

10. A spring door hinge according to claim 9, characterized in that: A number of elastic buckles (43) extend backwards from the back of the fixing plate (4). Correspondingly, a number of positioning grooves (14) are provided on the installation seat (12). The fixing plate (4) is positioned and installed by buckling the elastic buckles (43) in the positioning grooves (14).

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