Junction Box

Abstract

The present invention discloses a junction box, including a shell and a circuit board arranged in the shell, the circuit board is provided with a main power input terminal, a main power output terminal, a first power terminal and a second power terminal, the first power terminal and the second power terminal are electrically connected through a wiring, and the circuit board is also provided with a male interface terminal and a female interface terminal respectively connected to the wiring, and the male interface terminal and the female interface terminal match each other. When in use, the main power input terminal and the main power output terminal are respectively connected to the power supply end and the bus, the first power terminal and the second power terminal are respectively connected to the indoor unit and the door unit, which is conducive to making the wiring of the power supply end neat, and in addition, the male terminal and the female terminal can be used in series, without additional wiring, which is convenient for the expansion of the power supply and the junction box.

Description

Technical Field

[0001] The invention relates to the technical field of access control intercom equipment, and in particular to a junction box. Background Art

[0002] Existing access control intercom equipment generally includes an indoor unit and a door unit. During installation, the indoor unit and the door unit need to be connected to the power supply through wires respectively. The wiring at the power supply end is complicated and does not have a short-circuit protection function. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a junction box that can simplify the wiring of the power supply end.

[0004] According to the first aspect of the present invention, the junction box includes a shell and a circuit board arranged in the shell, the circuit board is provided with a main power input terminal, a main power output terminal, a first power terminal and a second power terminal, the first power terminal and the second power terminal are electrically connected through wiring, and the circuit board is also provided with a male interface terminal and a female interface terminal respectively connected to the wiring, and the male interface terminal and the female interface terminal match each other.

[0005] The junction box according to the embodiment of the present invention has at least the following beneficial effects:

[0006] When in use, the main power input terminal and the main power output terminal are respectively connected to the power end and the bus, and the first power terminal and the second power terminal are respectively connected to the indoor unit and the door unit, which is conducive to making the wiring of the power end neat. In addition, the male terminal and the female terminal can be used in series without additional wiring, which is convenient for the expansion of the power supply and junction box.

[0007] According to some embodiments of the present invention, the male interface terminal adopts a USB interface male connector, and the female interface terminal adopts a USB interface female connector that matches the USB interface male connector.

[0008] According to some embodiments of the present invention, a first fuse RS4 is connected between the first power terminal and the wiring, and a second fuse RS3 is connected between the second power terminal and the wiring.

[0009] According to some embodiments of the present invention, at least two indicator lights are provided on the circuit board, wherein one of the indicator lights is connected to the positive pole of the first power terminal, and the other indicator light is connected to the positive pole of the second power terminal.

[0010] According to some embodiments of the present invention, four indicator lights are provided on the circuit board, and the four indicator lights are respectively a first indicator light, a second indicator light, a third indicator light and a fourth indicator light, the cathode of the first indicator light is grounded, the anode of the first indicator light is connected to a resistor R1, and is connected to the anode of the first power terminal through the resistor R1, the anode of the second indicator light is grounded, the cathode of the second indicator light is connected to a resistor R2, and is connected to the anode of the first power terminal through the resistor R2;

[0011] The cathode of the third indicator light is grounded, the anode of the third indicator light is connected to a resistor R6, and is connected to the anode of the second power supply terminal through the resistor R6, the anode of the fourth indicator light is grounded, the cathode of the fourth indicator light is connected to a resistor R5, and is connected to the anode of the second power supply terminal through the resistor R5.

[0012] According to some embodiments of the present invention, the first indicator light and the second indicator light are respectively arranged on the positive side and the negative side of the first power terminal, and the third indicator light and the fourth indicator light are respectively arranged on the positive side and the negative side of the second power terminal.

[0013] According to some embodiments of the present invention, the housing includes an upper cover and a lower cover that are detachably connected, and the lower cover is provided with heat dissipation holes.

[0014] According to some embodiments of the present invention, the upper cover is provided with an avoidance groove.

[0015] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0017] Figure 1 Schematic diagram of the structure of an embodiment of the present invention Figure 1 ;

[0018] Figure 2 Schematic diagram of explosion of an embodiment of the present invention Figure 1 ;

[0019] Figure 3 A schematic diagram of a serial connection structure of an embodiment of the present invention;

[0020] Figure 4 Schematic diagram of the structure of an embodiment of the present invention Figure 2 ;

[0021] Figure 5Schematic diagram of explosion of an embodiment of the present invention Figure 2 ;

[0022] Figure 6 4 is a circuit diagram of an embodiment of the present invention. DETAILED DESCRIPTION

[0023] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0024] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0025] Please refer to Figure 1 and Figure 2 The present embodiment discloses a junction box, including a shell 100 and a circuit board 200 arranged in the shell 100, wherein the circuit board 200 is provided with a main power input terminal 201, a main power output terminal 202, a first power terminal 203 and a second power terminal 204, wherein the first power terminal 203 and the second power terminal 204 are electrically connected via a wiring 205, and the circuit board 200 is also provided with a male interface terminal 206 and a female interface terminal 207 respectively connected to the wiring 205, wherein the male interface terminal 206 and the female interface terminal 207 match each other.

[0026] When in use, the main power input terminal 201 is connected to the power end, the main power output terminal 202 can be connected to the bus or idle, the first power terminal 203 and the second power terminal 204 are connected to the indoor unit and the door unit respectively, which can reduce the number of wiring at the power end and help to make the wiring at the power end neat; in addition, please refer to Figure 3 The male interface terminal 206 and the female interface terminal 207 can be used in series without additional wiring, which is convenient for the expansion of the power supply and the junction box. It should be conceived that the number of the male interface terminal 206 or the female interface terminal 207 can be one or more than two according to the actual product requirements. Specifically, the male interface terminal 206 and the female interface terminal 207 are respectively arranged on opposite sides of the housing 100, and the male interface terminal 206 extends from the inside of the housing 100 to the outside of the housing 100. When in use, the male interface terminal 206 of one junction box is inserted into the female interface terminal 207 of another junction box to achieve a series connection. The operation is simple and convenient, which is conducive to improving the product installation efficiency.

[0027] Please refer to Figure 2 and Figure 6 In order to provide the applicability of the product, the male interface terminal 206 adopts a USB interface male connector, and the female interface terminal 207 adopts the USB interface female connector that matches the USB interface male connector. The ground pin of the USB interface male connector is connected to the ground terminal of the circuit board 200, and the other pins of the USB interface male connector are short-circuited together and connected to the wiring 205. The ground pin of the USB interface male connector and the other short-circuited pins are respectively used as power supply poles; similarly, the ground pin of the USB interface female connector is grounded, and the other pins of the USB interface female connector are short-circuited together and connected to the wiring 205.

[0028] Please refer to Figure 6 A first fuse RS4 is connected between the first power terminal 203 and the wiring 205, and a second fuse RS3 is connected between the second power terminal 204 and the wiring 205. By setting the first fuse RS4 and the second fuse RS3, the indoor unit and the door unit can be protected from short circuit and overvoltage respectively, which is beneficial to improving the safety of the product.

[0029] Please refer to Figures 4 to 6 At least two indicator lights are provided on the circuit board 200, one of which is connected to the positive pole of the first power terminal 203, and the other is connected to the positive pole of the second power terminal 204, and the two indicator lights are used to display the working status of the first power terminal 203 and the second power terminal 204 respectively.

[0030] Please refer to Figure 6 In this embodiment, no matter whether the main power input terminal 201 is connected to the power source in the forward or reverse direction, the junction box can be powered on. For the first power terminal 203 and the second power terminal 204, only the positive and negative polarities of the pins are different. In order to distinguish the positive and negative polarities of the first power terminal 203 and the second power terminal 204, four indicator lights are arranged on the circuit board 200, and the four indicator lights are respectively a first indicator light 601, a second indicator light 602, a third indicator light 603 and a fourth indicator light 604. The negative pole of the first indicator light 601 is grounded, the positive pole of the first indicator light 601 is connected to a resistor R1, and is connected to the positive pole of the first power terminal 203 through the resistor R1, the positive pole of the second indicator light 602 is grounded, the negative pole of the second indicator light 602 is connected to a resistor R2, and is connected to the positive pole of the first power terminal 203 through the resistor R2; when the main power input terminal 201 is positively connected to the power supply, the first indicator light 601 is on and the second indicator light 602 is off; when the main power input terminal 201 is reversely connected to the power supply, the second indicator light 602 is on and the first indicator light 601 is off.

[0031] Similarly, the negative pole of the third indicator light 603 is grounded, the positive pole of the third indicator light 603 is connected to the resistor R6, and is connected to the positive pole of the second power supply terminal 204 through the resistor R6, the positive pole of the fourth indicator light 604 is grounded, the negative pole of the fourth indicator light 604 is connected to the resistor R5, and is connected to the positive pole of the second power supply terminal 204 through the resistor R5.

[0032] The first indicator light 601 and the second indicator light 602 are respectively arranged on the positive side and the negative side of the first power terminal 203. When the first indicator light 601 is on, it means that the main power input terminal 201 is positively connected to the power supply, and the second pin of the first power terminal 203 is the positive pole; when the second indicator light 602 is on, it means that the main power input terminal 201 is reversely connected to the power supply, and the first pin of the first power terminal 203 is the positive pole, which can vividly and intuitively indicate the positive pin of the first power terminal 203 and the working status of whether it is powered on; similarly, the third indicator light 603 and the fourth indicator light 604 are respectively arranged on the positive side and the negative side of the second power terminal 204.

[0033] Please refer to Figure 5 The housing 100 includes an upper cover 101 and a lower cover 102 that are detachably connected. Specifically, the upper cover 101 and the lower cover 102 are snap-fitted or screwed together, and the lower cover 102 is provided with heat dissipation holes 103, which is beneficial to improving the heat dissipation performance of the junction box.

[0034] The upper cover 101 is provided with an avoidance groove 104, and the positions of the avoidance groove 104 correspond to the first power terminal 203, the second power terminal 204, the male interface terminal 206 and the female interface terminal 207, respectively, so as to facilitate the installation and wiring of the upper cover 101. It should be borne in mind that when the main power input terminal 201 and the main power output terminal 202 are provided on the wiring box of this embodiment, the upper cover 101 should be provided with an avoidance groove 104 at the position of the main power input terminal 201 and the main power output terminal 202.

[0035] It should be noted that the positive and negative poles of the main power input terminal 201, the main power output terminal 202, the first power terminal 203 and the second power terminal 204 are only used to distinguish different pins for the convenience of explaining the technical solution, and do not distinguish the polarity of the pins.

[0036] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A junction box, characterized in that: The invention comprises a housing (100) and a circuit board (200) arranged in the housing (100), wherein the housing (100) comprises an upper cover (101) and a lower cover (102) which are detachably connected, wherein the lower cover (102) is provided with a heat dissipation hole (103), wherein the circuit board (200) is provided with a main power input terminal (201), a main power output terminal (202), a first power terminal (203) and a second power terminal (204), wherein the first power terminal (203) and the second power terminal (204) are electrically connected via a wiring (205), and wherein the circuit board (200) is further provided with a male interface terminal (206) and a female interface terminal (207) which are respectively connected to the wiring (205). The male interface terminal (206) and the female interface terminal (207) match each other; four indicator lights are arranged on the circuit board (200), and the four indicator lights are respectively a first indicator light (601), a second indicator light (602), a third indicator light (603) and a fourth indicator light (604); the cathode of the first indicator light (601) is grounded, the anode of the first indicator light (601) is connected to a resistor R1, and is connected to the anode of the first power terminal (203) through the resistor R1; the anode of the second indicator light (602) is grounded, the cathode of the second indicator light (602) is connected to a resistor R2, and is connected to the anode of the first power terminal (203) through the resistor R2; The negative pole of the third indicator light (603) is grounded, the positive pole of the third indicator light (603) is connected to a resistor R6, and is connected to the positive pole of the second power supply terminal (204) through the resistor R6, the positive pole of the fourth indicator light (604) is grounded, the negative pole of the fourth indicator light (604) is connected to a resistor R5, and is connected to the positive pole of the second power supply terminal (204) through the resistor R5.

2. The junction box according to claim 1, characterized in that: The male interface terminal (206) adopts a USB interface male head, and the female interface terminal (207) adopts a USB interface female head that matches the USB interface male head.

3. The junction box according to claim 1, characterized in that: A first fuse RS4 is connected between the first power terminal (203) and the wiring (205), and a second fuse RS3 is connected between the second power terminal (204) and the wiring (205).

4. The junction box according to claim 1, characterized in that: The first indicator light (601) and the second indicator light (602) are respectively arranged on the positive side and the negative side of the first power terminal (203), and the third indicator light (603) and the fourth indicator light (604) are respectively arranged on the positive side and the negative side of the second power terminal (204).

5. The junction box according to claim 1, characterized in that: The upper cover (101) is provided with an avoidance groove (104).

Images