Wireless contact type power supply interface structure

Abstract

The utility model discloses a wireless contact type power supply interface structure, which comprises a surface contact arranged on the upper surface of a power supply seat and a conducting ring arranged on the lower surface of a power receiving seat, and the upper surface of the power supply seat is provided with a contact limiting hole corresponding to the surface contact. The surface contact contacts protrude out of the upper surface of the power supply base from the interiors of the contact limiting holes under the action of the supporting springs, and the conducting ring is correspondingly provided with a surface contact ring, and when the upper surface of the power supply base and the lower surface of the power receiving base make contact with each other to form a power supply interface, the surface contact rings are in contact with each other. And surface contact conduction is formed between the upper end of the surface contact point and the surface contact ring. And the direct conductivity of the contact point and the contact surface is prevented from being damaged due to point discharge caused by spherical contact of the vibrating needle and spring conduction under the condition of low voltage and large current.

Description

Technical Field

[0001] This utility model relates to the field of wireless power supply technology, and in particular to a wireless contact power supply interface structure. Background Technology

[0002] Wireless power technology eliminates the need for wired connections, making device charging and use more flexible and convenient. The absence of exposed wires also reduces the risk of electric shock and fire caused by aging or damaged wiring.

[0003] Currently, there are two methods for wireless power supply: one is to achieve wireless power supply through high-frequency radio frequency signals between two coils, such as the Qi wireless charging communication protocol of the Wireless Power Consortium. The disadvantages are that it cannot achieve high-power supply and its power supply efficiency is not high. The other method is to achieve wireless power supply through contact points, such as in smartwatches, mobile phones, and heated power sockets.

[0004] With the widespread adoption of USB-PD fast charging / QC fast charging interfaces, covering power levels below 200W, and featuring low voltage and high current characteristics, wireless power supply via contact points has seen numerous applications. However, contact power supply currently suffers from at least the following drawbacks:

[0005] First, a snap-fit ​​device is required, making it impossible to achieve mobile power supply; second, especially when using spring pins for contact power supply, the current will increase when the power supply is increased, causing the current to flow through the spring. Due to the large internal resistance of the spring, the heat generated will also increase with the increase of the current, which will cause the spring elasticity to disappear and make normal contact. The internal resistance will be even greater, which will cause the fixing plastic parts of the spring pin to melt, and even cause a fire. Utility Model Content

[0006] The technical problem to be solved by this utility model is to provide a wireless contact power supply interface structure, which aims to solve the technical problem that the existing TOF sensor water level measurement structure has a large error due to the presence of water droplets in the optical path.

[0007] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows:

[0008] A wireless contact-type power supply interface structure includes a surface contact point disposed on the upper surface of a power supply base and a conductive ring disposed on the lower surface of a power receiving base. The upper surface of the power supply base is provided with a contact limiting hole corresponding to the surface contact point. The surface contact point protrudes from the contact limiting hole of the power supply base under the action of a support spring. A surface contact ring is correspondingly disposed on the conductive ring. When the upper surface of the power supply base and the lower surface of the power receiving base come into contact with each other to form a power supply interface, a surface contact conduction is formed between the upper end of the surface contact point and the surface contact ring.

[0009] Specifically, each of the surface contact points is mounted on a wiring PCB board, and the wiring PCB board is connected to the power supply in the power supply socket.

[0010] Furthermore, the wireless contact power supply interface structure also includes a spring mounting base. The lower surface of the power supply base is provided with a PCB board limiting groove corresponding to the wiring PCB board. The spring mounting base is provided with a support spring through a spring bracket. The support spring drives the spring bracket to press against the bottom of the wiring PCB board.

[0011] Specifically, the wiring PCB board is provided with wiring holes corresponding to the surface contact points, and floating holes are provided at the upper end of the spring bracket; so that the wiring PCB board is vertically limited in the PCB board limiting groove, and the floating holes allow the surface contact points to have a horizontal tilting stroke within the contact limiting holes.

[0012] Specifically, the spring mounting base is provided with a bracket mounting hole for accommodating the support spring and the spring bracket, and the spring mounting base is also provided with a fixing hole, and a fixing post is provided in the power supply base corresponding to the fixing hole.

[0013] Optionally, each of the wiring PCBs is provided with at least two surface contact points, and the two surface contact points correspond to the same surface contact ring on the conductive ring.

[0014] Optionally, the conductive ring is provided with two or more surface contact rings, and a wiring PCB board is provided for each surface contact ring, and the wiring PCB board is provided with at least two surface contact points.

[0015] Optionally, the surface contact point protrudes from the contact limiting hole at a height greater than or equal to 2mm, and the surface contact ring extends downward from the conductive ring at a height greater than or equal to 2mm. The power supply end protrudes, and the power receiving end is recessed, with the protrusion and recess dimensions both exceeding 2mm. Because the surface contact point has a floating stroke, the size of the power receiving end is unrestricted, offering strong expandability; and positioning alignment can be achieved even with arbitrary placement.

[0016] Preferably, the wireless contact power supply interface structure includes three wiring PCBs. Each wiring PCB has at least two surface contact points. On one wiring PCB, the height of the protrusion of at least two surface contact points from the contact limiting hole is lower than the height of the protrusion of at least two surface contact points from the contact limiting hole on the other two wiring PCBs. Three sets of contacts are provided, one of which is slightly lower than the other two, to detect contact status. Through circuit control, the following can be achieved: when the receiving end is lowered, this contact is the last to be connected, and power is supplied only after the circuit detects stable contact for several seconds; and when the receiving end is picked up, this contact is the first to be disconnected, and the circuit immediately disconnects the power supply.

[0017] The beneficial effects of this utility model are:

[0018] The wireless contact power supply interface structure of this utility model embodiment features surface contact points and surface contact rings. Each group of contacts at the power supply end has two contact surfaces, a travel limiting structure around the perimeter, and a spring positioning point in the middle. The spring does not participate in current transmission. The current is directly connected to the two contact surfaces through a flexible circuit. This structure is suitable for low-voltage, high-current applications and avoids the spherical contact of the spring needle and the tip discharge caused by spring conductivity, which could damage the conductivity between the contact points and the contact surfaces. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 The three-dimensional exploded structure of the wireless contact power supply interface structure of this utility model. Figure 1 ;

[0021] Figure 2 The three-dimensional exploded structure of the wireless contact power supply interface structure of this utility model. Figure 2 ;

[0022] Figure 3 The structural diagram of the wireless contact power supply interface of this utility model is omitted.

[0023] Figure 4 This is a cross-sectional view of the wireless contact power supply interface structure of this utility model.

[0024] In the diagram, 10 is the wire contact power supply interface structure, 11 is the surface contact contact, 12 is the wiring PCB board, 121 is the wiring hole, 122 is the floating hole, 13 is the spring bracket, 14 is the spring mounting base, 141 is the bracket mounting hole, 142 is the fixing hole, 15 is the conductive ring, and 151 is the surface contact ring.

[0025] 20-Power supply socket, 21-Contact limiting hole, 22-PCB board limiting groove, 23-Fixing post;

[0026] 30 - Power receiving base. Detailed Implementation

[0027] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings. It should be noted that these descriptions are for the purpose of aiding understanding of this utility model, but do not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0028] Example 1

[0029] like Figure 1-4 As shown, this utility model embodiment provides a wireless contact power supply interface structure 10, including a surface contact contact 11 disposed on the upper surface of a power supply base 20 and a conductive ring 15 disposed on the lower surface of a power receiving base 30. The upper surface of the power supply base 20 is provided with a contact limiting hole 21 corresponding to the surface contact contact 11. The surface contact contact 11 protrudes from the contact limiting hole 21 from the upper surface of the power supply base 20 under the action of a support spring. The conductive ring 15 is provided with a surface contact ring 151. When the upper surface of the power supply base 20 and the lower surface of the power receiving base 30 come into contact with each other to form a power supply interface, a surface contact conduction is formed between the upper end of the surface contact contact 11 and the surface contact ring 151.

[0030] Specifically, each of the surface contact points 11 is mounted on a wiring PCB board 12, and the wiring PCB board 12 is connected to the power supply in the power supply socket 20.

[0031] like Figure 2-4 As shown, the wireless contact power supply interface structure 10 also includes a spring mounting base 14. The lower surface of the power supply base 20 is provided with a PCB board limiting groove 22 corresponding to the wiring PCB board 12. The spring mounting base 14 is provided with a support spring through a spring bracket 13. The support spring drives the spring bracket 13 to press against the bottom of the wiring PCB board 12.

[0032] Specifically, the wiring PCB board 12 is provided with a wiring hole 121 corresponding to the surface contact point 11, and a floating hole 122 is provided at the upper end of the spring bracket 13; so that the wiring PCB board 12 is vertically limited in the PCB board limiting groove 22, and the floating hole 122 allows the surface contact point 11 to have a horizontal tilting stroke in the contact limiting hole 141.

[0033] Specifically, the spring mounting base 14 is provided with a bracket mounting hole 141 for accommodating the support spring and the spring bracket 13, and the spring mounting base 14 is also provided with a fixing hole 142, and a fixing post 23 is provided in the power supply base 20 corresponding to the fixing hole 142.

[0034] Optionally, each of the wiring PCB boards 12 is provided with at least two surface contact points 11, and the two surface contact points 11 correspond to the same surface contact ring 151 on the conductive ring 15.

[0035] Optionally, the conductive ring 15 is provided with two or more surface contact rings 151, and a wiring PCB board 12 is provided for each surface contact ring 151. The wiring PCB board 12 is provided with at least two surface contact points 11.

[0036] Optionally, the surface contact 11 protrudes from the contact limiting hole 21 with a height greater than or equal to 2mm, and the surface contact ring 151 extends downward from the conductive ring 15 with a height greater than or equal to 2mm. The power supply end protrudes, and the power receiving end is recessed, with the protrusion and recess dimensions both greater than 2mm. Because the surface contact has a floating stroke, the size of the power receiving end is not limited, and it has strong expandability; and it can achieve limiting alignment even when placed arbitrarily.

[0037] Preferably, the wireless contact power supply interface structure 10 includes three wiring PCBs 12. Each wiring PCB 12 has at least two surface contact points 11. The height of the protrusion of at least two surface contact points 11 from the contact limiting hole 21 on one wiring PCB 12 is lower than the height of the protrusion of at least two surface contact points 11 from the contact limiting hole 21 on the other two wiring PCBs 12. Three sets of contacts are provided, one of which is slightly lower than the other two, to detect the contact status. Through circuit control, the following can be achieved: when the receiving end is lowered, this contact is the last to be connected, and power is supplied after several seconds of stable contact detection; and when the receiving end is picked up, this contact is the first to be disconnected, and the circuit immediately disconnects the power supply.

[0038] The wireless contact power supply interface structure of this utility model embodiment features surface contact points and surface contact rings. Each group of contacts at the power supply end has two contact surfaces, a travel limiting structure around the perimeter, and a spring positioning point in the middle. The spring does not participate in current transmission. The current is directly connected to the two contact surfaces through a flexible circuit. This structure is suitable for low-voltage, high-current applications and avoids the spherical contact of the spring needle and the tip discharge caused by spring conductivity, which could damage the conductivity between the contact points and the contact surfaces.

[0039] The embodiments of this utility model have been described in detail above with reference to the accompanying drawings, but this utility model is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of this utility model, and these variations still fall within the protection scope of this utility model.

Claims

1. A wireless contact-type power supply interface structure, characterized in that, The device includes a surface contact point disposed on the upper surface of the power supply base and a conductive ring disposed on the lower surface of the power receiving base. The upper surface of the power supply base has a contact limiting hole corresponding to the surface contact point. The surface contact point protrudes from the contact limiting hole of the power supply base under the action of a support spring. The conductive ring has a corresponding surface contact ring. When the upper surface of the power supply base and the lower surface of the power receiving base come into contact with each other to form a power supply interface, a surface contact conduction is formed between the upper end of the surface contact point and the surface contact ring.

2. The wireless contact power supply interface structure according to claim 1, characterized in that, Each of the surface contact points is mounted on a wiring PCB board, and the wiring PCB board is connected to the power supply in the power supply socket.

3. The wireless contact power supply interface structure according to claim 2, characterized in that, The wireless contact power supply interface structure also includes a spring mounting base. The lower surface of the power supply base is provided with a PCB board limiting groove corresponding to the wiring PCB board. The spring mounting base is provided with a support spring through a spring bracket. The support spring drives the spring bracket to press against the bottom of the wiring PCB board.

4. The wireless contact power supply interface structure according to claim 3, characterized in that, The wiring PCB board is provided with wiring holes corresponding to the surface contact points, and floating holes are provided at the upper end of the spring bracket; so that the wiring PCB board is vertically limited in the PCB board limiting groove, and the floating holes allow the surface contact points to have a horizontal tilting stroke within the contact limiting holes.

5. The wireless contact power supply interface structure according to claim 3, characterized in that, The spring mounting base is provided with a bracket mounting hole for accommodating the support spring and the spring bracket. The spring mounting base is also provided with a fixing hole, and a fixing post is provided in the power supply base corresponding to the fixing hole.

6. The wireless contact power supply interface structure according to claim 2, characterized in that, Each of the wiring PCBs is provided with at least two surface contact points, and the two surface contact points correspond to the same surface contact ring on the conductive ring.

7. The wireless contact power supply interface structure according to claim 6, characterized in that, The conductive ring is provided with two or more surface contact rings, and a wiring PCB board is provided for each surface contact ring. The wiring PCB board is provided with at least two surface contact points.

8. The wireless contact power supply interface structure according to claim 1, characterized in that, The surface contact point protrudes from the contact point limiting hole at a height greater than or equal to 2 mm, and the surface contact ring extends downward from the conductive ring at a height greater than or equal to 2 mm.

9. The wireless contact power supply interface structure according to claim 2, characterized in that, The wireless contact power supply interface structure includes three wiring PCBs. Each wiring PCB is provided with at least two surface contact points. The height of the protrusion of the at least two surface contact points from the contact limiting hole on one wiring PCB is lower than the height of the protrusion of the at least two surface contact points from the contact limiting hole on the other two wiring PCBs.

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