Printed circuit board (PCB) with explosion-proof damping structure after packaging

Abstract

The utility model discloses a PCB circuit board possessing an explosion-proof damping structure after packaging, the PCB circuit board comprises a circuit board body and a housing packaging the circuit board body, the first edge of the bottom surface of the housing is provided with at least two damping elastic members, the second edge of the bottom surface of the housing is parallel to the first edge, and the second edge of the bottom surface of the housing is provided with at least two damping elastic members. And at least two hinges are arranged. According to the PCB circuit board, the U-shaped damping elastic piece is ingeniously used for damping, the damping effect of the PCB circuit board is good in cooperation with the hinge, and the PCB circuit board is convenient to disassemble and assemble and easy and convenient to maintain and operate. According to the damping elastic piece of the PCB, the strength of the corner part is enhanced, and the elastic capability of the damping elastic piece is improved. The circuit board body is provided with the voltage detection circuit, so that the stability of power supply output is effectively ensured.

Description

Technical Field

[0001] The utility model relates to a PCB circuit board, in particular to a PCB circuit board with an explosion-proof and shock-absorbing structure after being packaged. Background Art

[0002] Almost every electronic device, from electronic watches and calculators to computers, communication electronic equipment, and military weapon systems, as long as there are electronic components such as integrated circuits, must use printed circuit boards to make electrical interconnections between the various components. The printed circuit board consists of an insulating base plate, connecting wires, and pads for assembling and welding electronic components. It has the dual functions of a conductive line and an insulating base plate.

[0003] For some existing movable devices, cracks are easy to appear on the circuit board, and the electronic components of the circuit board are fixed on the circuit board. If the movement range of the circuit board is too large, the connection position between the electronic components and the circuit board is easy to break, causing the circuit layer on the circuit board to be broken, affecting the normal operation of the circuit board.

[0004] In the prior art, circuit board shock absorption mostly uses springs and silicone rubber for shock absorption. Although these shock absorbing parts also have shock absorption effects, the installation holes of the circuit board need to be processed during installation to enable the springs and silicone rubber to be better installed, but the operation is relatively cumbersome.

[0005] In addition, after the circuit board shock absorbers are installed, when the circuit board needs to be repaired, all shock absorbers need to be removed.

[0006] In view of this, it is necessary to design a new simple seismic structure to solve the above technical problems. Utility Model Content

[0007] In view of the deficiencies in the prior art, the technical problem to be solved by the utility model is to provide a PCB circuit board with an explosion-proof and shock-absorbing structure after being packaged. The purpose of designing the PCB circuit board is to facilitate disassembly and assembly and maintenance.

[0008] In order to solve the above technical problems, the utility model is implemented through the following scheme: the utility model is a PCB circuit board with an explosion-proof and shock-absorbing structure after being packaged, the PCB circuit board includes a circuit board body and a shell that packages the circuit board body, at least two shock-absorbing elastic parts are installed at the first edge of the bottom surface of the shell, and the bottom surface of the shell and the second side parallel to the first side are provided with at least two hinges.

[0009] Furthermore, the shell is an explosion-proof shell.

[0010] Furthermore, a radiator mounting hole is provided on the upper end surface of the shell, and a radiator with fins is installed at the radiator mounting hole.

[0011] Furthermore, the shock-absorbing elastic member is integrally formed and is a U-shaped structural member. Concave-convex strips for increasing elasticity are arranged on the outer side of the corners of the shock-absorbing elastic member.

[0012] Furthermore, a step is formed between the first side plate of the shock-absorbing elastic member and the corner of the shock-absorbing elastic member, and the tread of the step is in contact with the shell.

[0013] Furthermore, a coaxial hole is provided between the first side plate of the shock-absorbing elastic member and the second side plate of the shock-absorbing elastic member.

[0014] Furthermore, a voltage detection circuit is provided on the circuit board body.

[0015] Furthermore, the voltage detection circuit comprises:

[0016] A first amplifier circuit, the amplifier circuit includes an amplifier U23, a resistor RT1, a resistor RT2, a resistor R192, and a resistor R254. The resistor RT1 includes a first parallel circuit consisting of two resistors in parallel and a first series circuit consisting of two resistors in series. The first parallel circuit and the first series circuit are connected in series. The in-phase input terminal of the amplifier U23 is connected to a circuit node between the first parallel circuit and the first series circuit. The external end of the first series circuit is connected to a PR+_VIN circuit. The first end of the resistor R192 is connected to the external end of the first parallel circuit, and the second end thereof is grounded. The resistor R254 is connected in parallel with the resistor R192. The resistor RT2 includes a second parallel circuit consisting of two resistors in parallel and a second series circuit consisting of two resistors in series. The second parallel circuit and the second series circuit are connected in series. The second series circuit is connected to a PR-_VIN circuit. The inverting input terminal of the amplifier U23 is connected to a circuit node between the second parallel circuit and the second series circuit. The external end of the second parallel circuit is connected to the output terminal of the amplifier U23.

[0017] The voltage divider circuit includes a resistor exclusion RT3, wherein the resistor exclusion RT3 includes a third series circuit formed by two resistors connected in series, and two independent resistors close to and not connected to the third series circuit, wherein the first ends of the two independent resistors are connected to each other, and the second ends thereof are respectively connected to the IR-N circuit and the IR-P circuit, and the first ends of the two independent resistors are also connected to the IR-COOM circuit, and the outer end of the third series circuit is connected to the output end of the amplifier U23;

[0018] The second amplifying circuit includes an amplifier U24, a resistor RT4, and a MOS transistor Q23. The resistor RT4 includes four resistors connected in series, a first end of which is connected to the output end of the amplifier U24, a second end of which is connected to the drain D of the MOS transistor Q23, a source S of the MOS transistor Q23 is grounded, and a gate G of the MOS transistor Q23 is connected to the VOL_COM circuit. The inverting input end of the amplifier U24 is connected to a node of the resistor RT4, the non-inverting input end of the amplifier U24 is connected to the circuit node between the third series circuits, and the output end of the amplifier U24 is also connected to the VOL-DF-FB circuit;

[0019] A resistor R123, wherein a first end of the resistor R123 is connected to the output end of the amplifier U24, and a second end of the resistor R123 is connected to the VOL_ADC circuit;

[0020] An amplifier U8A, whose non-inverting input terminal is connected to the second end of the resistor R123, and whose inverting input terminal is connected to the VREFO circuit;

[0021] The diode D4 has its anode connected to the non-inverting input terminal of the amplifier U8A, and its cathode connected to the output terminal of the amplifier U8A.

[0022] Compared with the prior art, the beneficial effects of the utility model are:

[0023] 1. The utility model PCB circuit board cleverly uses a U-shaped shock-absorbing elastic member to reduce shock, and cooperates with the hinge to make the PCB circuit board have a good shock-absorbing effect, convenient disassembly and assembly, and simple maintenance operation.

[0024] 2. The shock-absorbing elastic member of the PCB circuit board of the utility model strengthens the strength of the corner portion and increases the elastic capacity of the shock-absorbing elastic member.

[0025] 3. The circuit board body of the utility model is provided with a voltage detection circuit, which effectively ensures the stability of power supply output. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a structural diagram of the pre-installation of a heat sink on a PCB circuit board of the utility model.

[0027] Figure 2 This is a structural diagram of the shock-absorbing elastic member of the utility model.

[0028] Figure 3 This is a side structural diagram of the circuit board body of the utility model.

[0029] Figure 4-5 After connection, the overall diagram of the voltage detection circuit of the utility model is formed.

[0030] Markings in the drawings: housing 1 , shock-absorbing elastic member 2 , hinge 3 , heat sink 4 , circuit board body 5 , first side plate 21 , second side plate 22 , coaxial hole 23 , concave-convex strip 24 , step 25 . DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model, so that the advantages and features of the utility model can be more easily understood by those skilled in the art, thereby making a clearer and more explicit definition of the protection scope of the utility model. Obviously, the embodiments described in the utility model are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0032] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0033] Embodiment 1, the specific structure of the utility model is as follows:

[0034] Please refer to the attached Figure 1-3 The utility model discloses a PCB circuit board with an explosion-proof and shock-absorbing structure after being packaged. The PCB circuit board comprises a circuit board body 5 and a shell 1 that packages the circuit board body 5. At least two shock-absorbing elastic members 2 are installed at the first edge of the bottom surface of the shell 1. At least two hinges 3 are provided on the bottom surface of the shell 1 and on the second edge that is parallel to the first edge. One metal leaf of the hinge 3 is installed on the bottom surface of the shell 1, and the other metal leaf is installed on the device. The shell 1 can rotate through the hinge.

[0035] A preferred technical solution of this embodiment: the housing 1 is an explosion-proof housing. The explosion-proof housing is an explosion-proof plastic housing or an explosion-proof metal housing. When the explosion-proof housing is an explosion-proof plastic housing, PC explosion-proof plastic is used. When the explosion-proof housing is an aluminum alloy explosion-proof housing, the aluminum alloy has heat dissipation capability.

[0036] A preferred technical solution of this embodiment: a radiator mounting hole 11 is provided on the upper end surface of the shell 1, and a radiator 4 with fins is installed at the radiator mounting hole 11, and the radiator 4 has a heat dissipation function.

[0037] A preferred technical solution of this embodiment: the shock-absorbing elastic member 2 is integrally formed and is a U-shaped structural member. The outer side of the corner of the shock-absorbing elastic member 2 is provided with a concave-convex strip 24 for increasing elasticity. The purpose of setting the shock-absorbing elastic member 2 as a U-shaped structure is to reduce shock. The U-shaped structure of the shock-absorbing elastic member 2 also has the function of a bayonet.

[0038] A preferred technical solution of this embodiment is that a step 25 is formed between the first side plate 21 of the shock-absorbing elastic member 2 and the corner of the shock-absorbing elastic member 2 , and the tread of the step 25 is in contact with the shell 1 .

[0039] A preferred technical solution of this embodiment: a coaxial hole 23 is provided between the first side plate 21 of the shock-absorbing elastic member 2 and the second side plate 22 of the shock-absorbing elastic member 2, one of the holes is screwed to fix the shock-absorbing elastic member 2 to the bottom surface of the shell 1, and the other hole is provided with a screw hole, which can be used to lock the screw on the other panel body of the device.

[0040] like Figure 4-5 As shown, a preferred technical solution of this embodiment is: a voltage detection circuit is provided on the circuit board body 5, and the purpose of the voltage detection circuit is to detect whether the voltage output by the power supply is stable.

[0041] A preferred technical solution of this embodiment: the voltage detection circuit includes:

[0042] A first amplifier circuit, the amplifier circuit includes an amplifier U23, a resistor RT1, a resistor RT2, a resistor R192, and a resistor R254. The resistor RT1 includes a first parallel circuit consisting of two resistors in parallel and a first series circuit consisting of two resistors in series. The first parallel circuit and the first series circuit are connected in series. The in-phase input terminal of the amplifier U23 is connected to a circuit node between the first parallel circuit and the first series circuit. The external end of the first series circuit is connected to a PR+_VIN circuit. The first end of the resistor R192 is connected to the external end of the first parallel circuit, and the second end thereof is grounded. The resistor R254 is connected in parallel with the resistor R192. The resistor RT2 includes a second parallel circuit consisting of two resistors in parallel and a second series circuit consisting of two resistors in series. The second parallel circuit and the second series circuit are connected in series. The second series circuit is connected to a PR-_VIN circuit. The inverting input terminal of the amplifier U23 is connected to a circuit node between the second parallel circuit and the second series circuit. The external end of the second parallel circuit is connected to the output terminal of the amplifier U23.

[0043] The voltage divider circuit includes a resistor exclusion RT3, wherein the resistor exclusion RT3 includes a third series circuit formed by two resistors connected in series, and two independent resistors close to and not connected to the third series circuit, wherein the first ends of the two independent resistors are connected to each other, and the second ends thereof are respectively connected to the IR-N circuit and the IR-P circuit, and the first ends of the two independent resistors are also connected to the IR-COOM circuit, and the outer end of the third series circuit is connected to the output end of the amplifier U23;

[0044] The second amplifying circuit includes an amplifier U24, a resistor RT4, and a MOS transistor Q23. The resistor RT4 includes four resistors connected in series, a first end of which is connected to the output end of the amplifier U24, a second end of which is connected to the drain D of the MOS transistor Q23, a source S of the MOS transistor Q23 is grounded, and a gate G of the MOS transistor Q23 is connected to the VOL_COM circuit. The inverting input end of the amplifier U24 is connected to a node of the resistor RT4, the non-inverting input end of the amplifier U24 is connected to the circuit node between the third series circuits, and the output end of the amplifier U24 is also connected to the VOL-DF-FB circuit;

[0045] A resistor R123, wherein a first end of the resistor R123 is connected to the output end of the amplifier U24, and a second end of the resistor R123 is connected to the VOL_ADC circuit;

[0046] An amplifier U8A, whose non-inverting input terminal is connected to the second end of the resistor R123, and whose inverting input terminal is connected to the VREFO circuit;

[0047] The diode D4 has its anode connected to the non-inverting input terminal of the amplifier U8A, and its cathode connected to the output terminal of the amplifier U8A.

[0048] Embodiment 2:

[0049] like Figure 4-5 As shown, the measured voltage passes through the first amplifier circuit composed of amplifier U23, resistors RT1, RT2, resistor R192, and resistor R254. This circuit amplifies A=50 / 200=1 / 4. The stability of the amplification factor can be effectively controlled by the consistency of the temperature drift effect of resistors RT1 and RT2. The output voltage Vout of amplifier U23 is 1 / 4{(PR+VIN)-(PR-VIN)}, and the lower-level input voltage 1 / 8{(PR+VIN)-(PR-VIN)} is obtained through the voltage divider of resistor RT3. The latter circuit is a common-phase input negative feedback amplifier circuit composed of amplifier U24, resistor RT4, and MOS transistor Q23. When MOS transistor Q23 is turned off, the circuit is a phase follower, and the input and output voltages are equal to the input voltage, corresponding to the 20V range. When MOS transistor Q23 is turned on, the circuit is a common-phase input negative feedback amplifier circuit, and the amplification factor A=4, corresponding to the 5V range. Similarly, the stability of the amplification factor can be effectively controlled by the consistency of the temperature drift effect of the resistor RT4 itself. Amplifier U8A, diode D4, and VREF0 form a clamping circuit. When the VOL-ADC value is greater than VREF0, the 1st pin of amplifier U8A outputs a low level. At this time, diode D4 is turned on to ensure that the input AD chip point does not exceed 2.5V.

[0050] In summary, the PCB circuit board of the utility model cleverly uses a U-shaped shock-absorbing elastic member to reduce shock, and cooperates with the hinge to make the PCB circuit board have a good shock-absorbing effect, convenient disassembly and assembly, and simple maintenance operation. The shock-absorbing elastic member of the PCB circuit board of the utility model strengthens the strength of the corner part and increases the elastic capacity of the shock-absorbing elastic member. The circuit board body of the utility model is provided with a voltage detection circuit, which effectively ensures the stability of the power supply output.

[0051] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A PCB circuit board having an explosion-proof and shock-absorbing structure after packaging, the PCB circuit board comprising a circuit board body (5) and a shell (1) packaging the circuit board body (5), characterized in that: At least two shock-absorbing elastic members (2) are installed at the first edge of the bottom surface of the shell (1), and at least two hinges (3) are provided on the bottom surface of the shell (1) and on a second edge parallel to the first edge.

2. The PCB circuit board having an explosion-proof and shock-absorbing structure after packaging according to claim 1, characterized in that: The housing (1) is an explosion-proof housing.

3. The PCB circuit board having an explosion-proof and shock-absorbing structure after packaging according to claim 1, characterized in that: The upper end surface of the housing (1) is provided with a radiator mounting hole (11), and a radiator (4) with fins is mounted at the radiator mounting hole (11).

4. The PCB circuit board having an explosion-proof and shock-absorbing structure after packaging according to claim 1, characterized in that: The shock-absorbing elastic member (2) is integrally formed and is a U-shaped structural member. Concave-convex strips (24) for increasing elasticity are provided on the outer side of the corners of the shock-absorbing elastic member (2).

5. The PCB circuit board having an explosion-proof and shock-absorbing structure after packaging according to claim 4, characterized in that: A step (25) is formed between the first side plate (21) of the shock-absorbing elastic member (2) and the corner of the shock-absorbing elastic member (2), and the tread of the step (25) is in contact with the shell (1).

6. The PCB circuit board having an explosion-proof and shock-absorbing structure after packaging according to claim 4, characterized in that: A coaxial hole (23) is provided between the first side plate (21) of the shock-absorbing elastic member (2) and the second side plate (22) of the shock-absorbing elastic member (2).

7. The PCB circuit board with explosion-proof and shock-absorbing structure after packaging according to claim 1, characterized in that: The circuit board body (5) is provided with a voltage detection circuit.

8. The PCB circuit board with explosion-proof and shock-absorbing structure after packaging according to claim 7, characterized in that: The voltage detection circuit comprises: A first amplifier circuit, the amplifier circuit includes an amplifier U23, a resistor RT1, a resistor RT2, a resistor R192, and a resistor R254. The resistor RT1 includes a first parallel circuit consisting of two resistors in parallel and a first series circuit consisting of two resistors in series. The first parallel circuit and the first series circuit are connected in series. The in-phase input terminal of the amplifier U23 is connected to a circuit node between the first parallel circuit and the first series circuit. The external end of the first series circuit is connected to a PR+_VIN circuit. The first end of the resistor R192 is connected to the external end of the first parallel circuit, and the second end thereof is grounded. The resistor R254 is connected in parallel with the resistor R192. The resistor RT2 includes a second parallel circuit consisting of two resistors in parallel and a second series circuit consisting of two resistors in series. The second parallel circuit and the second series circuit are connected in series. The second series circuit is connected to a PR-_VIN circuit. The inverting input terminal of the amplifier U23 is connected to a circuit node between the second parallel circuit and the second series circuit. The external end of the second parallel circuit is connected to the output terminal of the amplifier U23. The voltage divider circuit includes a resistor exclusion RT3, wherein the resistor exclusion RT3 includes a third series circuit formed by two resistors connected in series, and two independent resistors close to and not connected to the third series circuit, wherein the first ends of the two independent resistors are connected to each other, and the second ends thereof are respectively connected to the IR-N circuit and the IR-P circuit, and the first ends of the two independent resistors are also connected to the IR-COOM circuit, and the outer end of the third series circuit is connected to the output end of the amplifier U23; The second amplifying circuit includes an amplifier U24, a resistor RT4, and a MOS transistor Q23. The resistor RT4 includes four resistors connected in series, a first end of which is connected to the output end of the amplifier U24, a second end of which is connected to the drain D of the MOS transistor Q23, a source S of the MOS transistor Q23 is grounded, and a gate G of the MOS transistor Q23 is connected to the VOL_COM circuit. The inverting input end of the amplifier U24 is connected to a node of the resistor RT4, the non-inverting input end of the amplifier U24 is connected to the circuit node between the third series circuits, and the output end of the amplifier U24 is also connected to the VOL-DF-FB circuit; A resistor R123, wherein a first end of the resistor R123 is connected to the output end of the amplifier U24, and a second end of the resistor R123 is connected to the VOL_ADC circuit; An amplifier U8A, whose non-inverting input terminal is connected to the second end of the resistor R123, and whose inverting input terminal is connected to the VREFO circuit; The diode D4 has its anode connected to the non-inverting input terminal of the amplifier U8A, and its cathode connected to the output terminal of the amplifier U8A.

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