Miniature generator capable of stably rebounding

Abstract

The utility model discloses a miniature generator capable of stably rebounding, and belongs to the field of miniature generators. The miniature generator comprises a base, a self-generating module, a pressing block and an elastic reset piece, an elastic piece of the self-generating module is arranged in an elastic piece hole of the pressing block, a receding opening is formed in the side, close to the self-generating module, of the pressing block, and the end portion of the free end of the elastic piece penetrates through the receding opening to be arranged in the elastic piece hole. The pressing block acts on the end portion of the free end of the elastic piece through the design of the single-side receding opening, the performance of the elastic piece can be brought into full play, the elastic piece can rebound rapidly when bent to reach the switching critical position, and the power generation efficiency is improved. When the pressing block is located at the pressing stroke upper dead center position, the self-generating module is in a first magnetic circuit state in which the elastic piece warps upwards, and the free end of the elastic piece abuts against the lower side face of the elastic piece hole, that is, the initial position of the elastic piece moves downwards properly, so that the rebound stability of the generator after pressing can be improved, and an elastic reset piece with smaller elastic force can be adopted conveniently; the pressing resistance is reduced and the pressing operation hand feeling is improved.

Description

Technical Field

[0001] This utility model relates to a self-generating device, and more specifically, to a stable and resilient micro generator. Background Technology

[0002] Miniature generators are one of the core components of existing self-generating doorbells, self-generating switches, and other products, and have broad application prospects in smart homes, industrial automation, and energy conservation and environmental protection. A miniature generator mainly consists of a coil, magnet, magnetic plate, and spring. Its working principle is to use mechanical actions such as pressing to cause the spring to bounce and switch the magnetic circuit, generating an induced current in the coil, thus converting mechanical kinetic energy into electrical energy.

[0003] As self-generating doorbells, self-generating switches, and other products increasingly demand slimmer and lighter designs, they further encroach on the installation space of micro generators. Currently, due to limitations in power generation and other performance characteristics, the size of micro generators is difficult to further reduce. Reducing product thickness primarily leads to a reduction in the pressing stroke of the spring contacts. Practical applications have revealed that because the pressing stroke of the spring contacts is reduced, and to lower pressing resistance, the reset elastic element often needs to act on the button of the spring contact, with the spring contact extending into a small hole on the button. The elastic force of the reset elastic element is also designed to be as small as possible. This results in the spring contacts of the micro generator often failing to spring back after being pressed, leading to micro generator failure.

[0004] Patent publication number CN212785123U, a self-generating switch module device, and patent publication number CN221299384U, a swing bracket and self-generating device, disclose a swing-type pressing structure. The swing-type button rests against the upper side of the spring and is used to press the spring downward. In order to facilitate the rebound of the button and the spring, a torsion spring needs to be set on the lower side of the spring. Although this design can ensure the stable rebound of the spring, when pressing the button, it is necessary to overcome the elastic force of the torsion spring and the deformation of the spring at the same time. The actual pressing operation has large resistance and poor operation feel.

[0005] Given the aforementioned shortcomings of the existing press-driven structure of micro generators, it is necessary to improve it in order to enhance the pressing and rebound stability of micro generators while ensuring easy and convenient pressing. Summary of the Invention

[0006] 1. Technical problem to be solved by the utility model

[0007] The purpose of this invention is to overcome the shortcomings of existing micro generators in terms of poor rebound stability and to provide a micro generator with stable rebound. The technical solution of this invention uses a single-sided clearance design so that the pressing block acts on the free end of the spring, which can fully utilize the performance of the spring and enable it to rebound quickly when it bends to the switching critical position, thereby improving power generation efficiency. At the same time, the initial position of the spring is appropriately lowered, which can improve the rebound stability of the micro generator after pressing and facilitate the use of a less elastic reset component, reducing pressing resistance and improving the pressing operation feel.

[0008] 2. Technical Solution

[0009] To achieve the above objectives, the technical solution provided by this utility model is as follows:

[0010] This utility model discloses a stable rebound micro generator, comprising a base, a self-generating module, a pressing block, and an elastic reset component. The self-generating module is fixedly installed within the base. The pressing block is slidably disposed within the base along the pressing direction. The spring plate of the self-generating module is disposed within the spring plate hole of the pressing block. The elastic reset component is disposed between the base and the pressing block, wherein:

[0011] The pressing block has a clearance opening on the side near the self-generating module, and the free end of the spring sheet passes through the clearance opening and is set in the spring sheet hole; when the pressing block is at the upper stop position of the pressing stroke, the self-generating module is in the first magnetic circuit state with the spring sheet tilted upward, and the free end of the spring sheet abuts against the lower side of the spring sheet hole.

[0012] Furthermore, the end of the self-generating module furthest from the spring is tilted upward relative to the base, so that the height of the free end of the spring relative to the bottom surface of the base is reduced.

[0013] Furthermore, the included angle α formed by the self-generating module tilting up relative to the bottom surface of the base is 0.5° to 2°.

[0014] Furthermore, the self-generating module is fixed in the module mounting cavity of the base by a snap-fit ​​structure. The bottom of the module mounting cavity is provided with a front support block and a rear support block for supporting the self-generating module. The height at which the self-generating module tilts upward relative to the base is determined by the height of the front support block and the rear support block.

[0015] Furthermore, the clearance opening is in the shape of a trumpet, gradually increasing in size from the spring hole towards the root of the spring.

[0016] Furthermore, the top surface of the pressing block is provided with a recessed pressing surface located above the clearance opening, and the bottom surface of the pressing block is provided with a boss located below the clearance opening. The pressing block is installed in the pressing cavity of the base, and the bottom of the pressing cavity has a notch corresponding to the aforementioned boss.

[0017] Furthermore, when the pressing block is at the top stop of the pressing stroke, the distance H between the sinking pressing surface of the pressing block and the bottom surface of the base is 7±1mm.

[0018] Furthermore, the pressing block has guide grooves at both ends, and the pressing cavity has limiting buckles on its side walls that cooperate with the guide grooves.

[0019] Furthermore, the bottom of both ends of the pressing block are respectively provided with chamfers.

[0020] Furthermore, the elastic reset element is a spring, with one spring on each side of the bottom of the pressing block, a positioning post for positioning the lower end of the spring on the base, and a spring positioning hole for positioning the upper end of the spring on the bottom of the pressing block.

[0021] 3. Beneficial effects

[0022] Compared with existing known technologies, the technical solution provided by this utility model has the following beneficial effects:

[0023] (1) A stable rebound micro generator of the present invention includes a base, a self-generating module, a pressing block and an elastic reset component. The spring of the self-generating module is disposed in the spring hole of the pressing block. The pressing block is provided with a clearance opening on the side near the self-generating module. The free end of the spring passes through the clearance opening and is disposed in the spring hole. The single-sided clearance opening design allows the pressing block to act on the free end of the spring, which can give full play to the performance of the spring and enable the spring to rebound quickly when it bends to the switching critical position, thereby improving the power generation efficiency. Furthermore, when the pressing block is at the upper stop position of the pressing stroke, the self-generating module is in the first magnetic circuit state with the spring tilted upward, and the free end of the spring is against the lower side of the spring hole, that is, the initial position of the spring is appropriately lowered. This can improve the rebound stability of the micro generator after pressing and facilitate the use of an elastic reset component with less elastic force, reduce pressing resistance and improve the pressing operation feel.

[0024] (2) The present invention provides a stable rebound micro generator, wherein the end of the self-generating module away from the spring is tilted upward relative to the base, so that the height of the free end of the spring relative to the bottom surface of the base is reduced. The included angle α formed by the self-generating module tilting relative to the bottom surface of the base is 0.5° to 2°. The rear end tilting design is simple in structure and does not occupy the height space of the micro generator pressing position, which can meet the needs of products with smaller thickness.

[0025] (3) A stable rebound micro generator of this utility model has a self-generating module fixed in the module mounting cavity of the base by a snap-fit ​​structure. The bottom of the module mounting cavity is provided with a front support block and a rear support block for supporting the self-generating module. The height of the self-generating module tilting upward relative to the base is determined by the height of the front support block and the rear support block. The tilt angle of the self-generating module can be adjusted by using the height of the front and rear support blocks according to the size and pressing stroke of different products, thereby ensuring the reliability of the pressing rebound of the micro generator after installation in the product.

[0026] (4) The micro generator with stable rebound of this utility model has a relief opening that is funnel-shaped and gradually increases from the spring hole to the root of the spring. While ensuring the structural strength of the pressing block, it can effectively avoid the rebound switching action of the spring and ensure the rebound speed of the spring.

[0027] (5) The present invention provides a stable rebound micro generator, wherein the top surface of the pressing block is provided with a recessed pressing surface located above the clearance opening, and the bottom surface of the pressing block is provided with a boss located below the clearance opening. The pressing block is installed in the pressing cavity of the base, and the bottom of the pressing cavity has a notch corresponding to the aforementioned boss. By reducing the pressing position of the pressing block through the recessed pressing surface, the thickness of the manufactured switch and other products can be reduced. At the same time, the steps on both sides of the recessed pressing surface and the boss on the bottom surface can further ensure the structural strength of the pressing block and prevent the pressing block from deforming and being damaged. The notch at the bottom of the pressing cavity can accommodate the boss, ensuring the effective pressing stroke of the pressing block. While ensuring the working stability of the micro generator, it is beneficial to reduce the thickness of the product. Attached Figure Description

[0028] Figure 1 This is a three-dimensional structural diagram of a stable and resilient micro generator according to the present invention.

[0029] Figure 2 This is an exploded view of a stable and resilient micro generator according to the present invention.

[0030] Figure 3 This is a cross-sectional view of a stable and resilient micro generator according to the present invention.

[0031] Figure 4 for Figure 3 A magnified schematic diagram of the local structure at point K;

[0032] Figure 5 This is a schematic diagram of the base structure in this utility model;

[0033] Figure 6 This is a schematic diagram of the pressing block in this utility model;

[0034] Figure 7This is a three-dimensional structural diagram of the self-generating module in this utility model;

[0035] Figure 8 This is a cross-sectional view of the self-generating module in this utility model.

[0036] Explanation of the labels in the diagram:

[0037] 1. Base; 1-1. Module mounting cavity; 1-2. Pressing cavity; 1-2a. Notch; 1-3. Limiting buckle; 1-4. Positioning post; 1-5. Front buckle; 1-6. Rear buckle; 1-7. Front support block; 1-8. Rear support block; 2. Self-generating module; 2-1. Spring; 2-2. Coil bracket; 2-2a. Rotation fulcrum; 2-3. Coil; 2-4. Magnetic guide frame; 2-5. Magnetic guide swing rod; 2-6. Permanent magnet; 3. Pressing block; 3-1. Clearance opening; 3-2. Recessed pressing surface; 3-3. Boss; 3-4. Guide slot; 3-5. Chamfer; 3-6. Spring hole; 3-6a. Lower side; 3-6b. Upper side; 3-7. Spring positioning hole; 4. Elastic reset component. Detailed Implementation

[0038] To further understand the content of this utility model, a detailed description of this utility model will be provided in conjunction with the accompanying drawings and embodiments.

[0039] [Example]

[0040] Combination Figures 1 to 4As shown, a stable rebound micro generator according to this embodiment includes a base 1, a self-generating module 2, a pressing block 3, and an elastic reset member 4. The self-generating module 2 is fixedly installed in the base 1. The pressing block 3 is slidably disposed in the base 1 along the pressing direction. The spring piece 2-1 of the self-generating module 2 is disposed in the spring piece hole 3-6 of the pressing block 3. The height of the spring piece hole 3-6 is slightly greater than the thickness of the spring piece 2-1. An upper side surface 3-6b for pressing down on the spring piece 2-1 and a lower side surface 3-6a for pushing up on the spring piece 2-1 are formed in the spring piece hole 3-6. The elastic reset member 4 is disposed between the base 1 and the pressing block 3. By pressing down on the pressing block 3, the spring piece 2-1 can bend and rebound, thereby changing the magnetic circuit in the self-generating module 2 to generate electrical energy. After releasing the pressing block 3, the elastic reset member 4 is used to reset the pressing block 3 and the spring piece 2-1, thereby changing the magnetic circuit in the self-generating module 2 to generate electrical energy again. In the self-generating module 2, there are two magnetic circuit states: a first magnetic circuit state where the spring piece 2-1 is tilted upwards and a second magnetic circuit state where the spring piece 2-1 is depressed downwards. The direction of the magnetic circuit within the self-generating module 2 can be changed by moving the spring piece 2-1 using the pressing block 3, thereby generating electrical energy. The pressing block 3 has a clearance opening 3-1 on the side near the self-generating module 2. The free end of the spring piece 2-1 passes through the clearance opening 3-1 and is positioned within the spring piece hole 3-6. This means that the pressing block 3 acts on the free end of the spring piece 2-1, fully utilizing its performance and allowing it to quickly rebound when it bends to the switching critical position, thus improving power generation efficiency. When the pressing block 3 is at the top dead center of its pressing stroke (i.e., the initial state), the self-generating module 2 is in the first magnetic circuit state where the spring piece 2-1 is tilted upwards, and the free end of the spring piece 2-1 rests against the lower side surface 3-6a of the spring piece hole 3-6 (refer to...). Figure 3 and Figure 4 As shown, relative to the pressing block 3, the initial position of the spring piece 2-1 is appropriately lowered, which can better drive the spring piece 2-1 during the reset process of the pressing block 3. This can improve the rebound stability of the micro generator after pressing and facilitate the use of a less elastic reset piece 4, reduce pressing resistance, and improve the pressing operation feel.

[0041] like Figure 3 As shown, in a preferred embodiment, the end of the self-generating module 2 furthest from the spring 2-1 is tilted upward relative to the base 1, so that the height of the free end of the spring 2-1 relative to the bottom surface of the base 1 is reduced. That is, the self-generating module 2 is tilted with its end near the spring 2-1 as the fulcrum, so that the spring 2-1 moves downward appropriately, achieving the effect described above where the free end of the spring 2-1 abuts against the lower side 3-6a of the spring hole 3-6 in the initial state. Furthermore, the rear-end tilting design is simple in structure and does not occupy the height space of the micro generator pressing position, which can meet the needs of products with smaller thickness. Specifically, the included angle α formed by the self-generating module 2 tilting relative to the bottom surface of the base 1 is 0.5° to 2°.

[0042] Reference Figure 2 and Figure 5 As shown, in this embodiment, the self-generating module 2 is fixed in the module mounting cavity 1-1 of the base 1 by a snap-fit ​​structure. The bottom of the module mounting cavity 1-1 is respectively provided with a front support block 1-7 and a rear support block 1-8 for supporting the self-generating module 2. The height at which the self-generating module 2 tilts upward relative to the base 1 is determined by the heights of the front support block 1-7 and the rear support block 1-8. That is, by adjusting the heights of the front support block 1-7 and the rear support block 1-8, the tilt degree of the self-generating module 2 can be controlled, thus controlling the height position of the free end of the spring piece 2-1. In this way, the tilt angle of the self-generating module 2 can be adjusted using the heights of the front and rear support blocks according to the size and pressing stroke of different products, thereby ensuring the reliability of the pressing and rebound mechanism after the micro-generator is installed in the product. The buckle structure on the base 1 includes a front buckle 1-5 and a rear buckle 1-6. The front buckle 1-5 and the rear buckle 1-6 respectively lock the front and rear sides of the self-generating module 2, thereby fixing the self-generating module 2 and facilitating the installation of the self-generating module 2 in the base 1.

[0043] like Figure 3 As shown, in this embodiment, the clearance opening 3-1 is funnel-shaped, gradually increasing in size from the spring hole 3-6 towards the root of the spring piece 2-1. While ensuring the structural strength of the pressing block 3, it effectively avoids the rebound switching action of the spring piece 2-1, ensuring the rebound speed of the spring piece 2-1. This single-sided clearance opening design makes the overall structure of the micro-generator more compact and small. Furthermore, as... Figure 2 and Figure 6 As shown, the top surface of the pressing block 3 has a recessed pressing surface 3-2 located above the clearance opening 3-1, and the bottom surface of the pressing block 3 has a boss 3-3 located below the clearance opening 3-1. The pressing block 3 is installed in the pressing cavity 1-2 of the base 1. The bottom of the pressing cavity 1-2 has a notch 1-2a corresponding to the aforementioned boss 3-3. By lowering the pressing surface 3-2, the pressing position of the pressing block 3 is reduced, which allows for a smaller thickness in products such as switches. At the same time, the steps on both sides of the recessed pressing surface 3-2 and the boss 3-3 on the bottom surface further ensure the structural strength of the pressing block 3 and prevent deformation and damage. The notch 1-2a at the bottom of the pressing cavity 1-2 can accommodate the aforementioned boss 3-3, ensuring the effective pressing stroke of the pressing block 3. This helps to reduce the thickness of the product while ensuring the working stability of the micro generator. Specifically, when the pressing block 3 is at the top stop of the pressing stroke, the distance H between the sinking pressing surface 3-2 of the pressing block 3 and the bottom surface of the base 1 is 7±1mm.

[0044] catch Figure 2 and Figure 6As shown, guide grooves 3-4 are provided at both ends of the pressing block 3, and limiting buckles 1-3 are provided on the side walls of the pressing cavity 1-2 to guide and cooperate with the guide grooves 3-4. The limiting buckles 1-3 cooperate with the guide grooves 3-4 to guide the pressing stroke, and at the same time, the limiting buckles 1-3 can restrict the pressing block 3 within the pressing cavity 1-2 and limit the upper stop position of the pressing block 3's stroke. To facilitate the installation of the pressing block 3, chamfers 3-5 are provided at the bottom of both ends of the pressing block 3. When the pressing block 3 is installed, the chamfers 3-5 cooperate with the limiting buckles 1-3 to allow it to smoothly pass over the limiting buckles 1-3 and enter the pressing cavity 1-2. The elastic reset member 4 is preferably a spring. There is one spring on each side of the bottom of the pressing block 3. The base 1 is provided with a positioning post 1-4 for positioning the lower end of the spring, and the bottom of the pressing block 3 is provided with a spring positioning hole 3-7 for positioning the upper end of the spring. The lower end of the spring is fitted onto the outside of the positioning post 1-4, and the upper end is inserted into the spring positioning hole 3-7, making the support of the pressing block 3 by the two springs more stable.

[0045] In this embodiment, the self-generating module 2 can be an existing product. Figure 7 and Figure 8 A specific structure of a self-generating module 2 is given. The self-generating module 2 includes a coil support 2-2, a coil 2-3, a magnetic guide frame 2-4, a magnetic guide swing rod 2-5, and a permanent magnet 2-6. The coil 2-3 is located outside the coil support 2-2. The magnetic guide frame 2-4 is combined with the coil support 2-2. The permanent magnet 2-6 is fixed on the upper and lower inner side walls of the tail of the magnetic guide frame 2-4. The magnetic guide swing rod 2-5 is installed inside the coil support 2-2 and can swing around the rotation fulcrum 2-2a in the middle of the coil support 2-2. When the tail of the magnetic guide swing rod 2-5 contacts the lower permanent magnet 2-6, a first magnetic circuit is formed. When the tail of the magnetic guide swing rod 2-5 contacts the upper permanent magnet 2-6, a second magnetic circuit is formed. The spring piece 2-1 is fixed to the extended end of the magnetic pendulum rod 2-5. When it is pressed by the pressing block 3, it first bends and deforms, generating a rebound force. When the pressing pressure reaches the critical point of the attraction of the permanent magnet 2-6 to the magnetic pendulum rod 2-5, the rebound action of the spring piece 2-1 enables the magnetic pendulum rod 2-5 to quickly switch the magnetic circuit direction, thereby generating current in the coil 2-3.

[0046] It should be noted that this utility model is not limited to Figure 7 and Figure 8 The self-generating module 2 shown can also be other existing self-generating modules.

[0047] This invention relates to a stable rebound micro generator. Through a single-sided clearance design, the pressing block acts on the free end of the spring, which can fully utilize the performance of the spring and enable it to rebound quickly when the spring bends to the switching critical position, thereby improving power generation efficiency. At the same time, the initial position of the spring is appropriately lowered, which can improve the rebound stability of the micro generator after pressing and facilitate the use of a less elastic reset component, reducing pressing resistance and improving the pressing operation feel.

[0048] The present invention and its embodiments have been described above illustratively. This description is not restrictive, and the figures shown are only one embodiment of the present invention; the actual structure is not limited thereto. Therefore, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A stable rebound micro generator, comprising a base (1), a self-generating module (2), a pressing block (3), and an elastic reset member (4), wherein the self-generating module (2) is fixedly installed in the base (1), the pressing block (3) is slidably disposed in the base (1) along the pressing direction, the spring plate (2-1) of the self-generating module (2) is disposed in the spring plate hole (3-6) of the pressing block (3), and the elastic reset member (4) is disposed between the base (1) and the pressing block (3), characterized in that: The pressing block (3) has a clearance opening (3-1) on the side near the self-generating module (2). The free end of the spring piece (2-1) passes through the clearance opening (3-1) and is set in the spring piece hole (3-6). When the pressing block (3) is at the upper stop position of the pressing stroke, the self-generating module (2) is in the first magnetic circuit state with the spring piece (2-1) tilted upward, and the free end of the spring piece (2-1) abuts against the lower side surface (3-6a) of the spring piece hole (3-6).

2. The stable rebound micro generator according to claim 1, characterized in that: The end of the self-generating module (2) away from the spring (2-1) is tilted upward relative to the base (1) so that the free end of the spring (2-1) is lowered relative to the bottom surface of the base (1).

3. The stable rebound micro generator according to claim 2, characterized in that: The included angle α formed by the self-generating module (2) tilting up relative to the bottom surface of the base (1) is 0.5° to 2°.

4. The stable rebound micro generator according to claim 2, characterized in that: The self-generating module (2) is fixed in the module mounting cavity (1-1) of the base (1) by a snap-fit ​​structure. The bottom of the module mounting cavity (1-1) is provided with a front support block (1-7) and a rear support block (1-8) for supporting the self-generating module (2). The height at which the self-generating module (2) tilts upward relative to the base (1) is determined by the height of the front support block (1-7) and the rear support block (1-8).

5. The stable rebound micro generator according to any one of claims 1 to 4, characterized in that: The clearance opening (3-1) is in the shape of a trumpet, gradually increasing in size from the spring hole (3-6) towards the root of the spring (2-1).

6. The stable rebound micro generator according to claim 5, characterized in that: The top surface of the pressing block (3) is provided with a recessed pressing surface (3-2) above the clearance opening (3-1), and the bottom surface of the pressing block (3) is provided with a boss (3-3) below the clearance opening (3-1). The pressing block (3) is installed in the pressing cavity (1-2) of the base (1), and the bottom of the pressing cavity (1-2) has a notch (1-2a) corresponding to the boss (3-3).

7. The stable rebound micro generator according to claim 6, characterized in that: When the pressing block (3) is at the top stop of the pressing stroke, the distance H between the sinking pressing surface (3-2) of the pressing block (3) and the bottom surface of the base (1) is 7±1mm.

8. The stable rebound micro generator according to claim 6, characterized in that: The pressing block (3) has guide grooves (3-4) at both ends, and the pressing cavity (1-2) has limit buckles (1-3) on its side wall that guide and cooperate with the guide grooves (3-4).

9. The stable rebound micro generator according to claim 8, characterized in that: The bottom of both ends of the pressing block (3) are respectively provided with chamfers (3-5).

10. The stable rebound micro generator according to claim 5, characterized in that: The elastic reset member (4) is a spring. There is one spring on each side of the bottom of the pressing block (3). The base (1) is provided with a positioning post (1-4) for positioning the lower end of the spring. The bottom of the pressing block (3) is provided with a spring positioning hole (3-7) for positioning the upper end of the spring.

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