Multi-functional PLC test box

Abstract

This utility model discloses a multifunctional PLC test chamber, belonging to the field of PLC testing technology. The device includes a chamber body, with a display screen fixedly installed in the center of one side of the chamber body. A circuit control assembly is installed inside the chamber body. Several testing connectors are snapped onto the chamber body below the display screen. A limiting assembly for limiting the PLC is slidably connected to the bottom of the chamber body. To meet various testing needs, this utility model includes a limiting assembly to stably limit the movement of PLC boards of different sizes and shapes. Specifically, lateral push plates on both sides are pushed towards the center of a support plate under the action of push springs. A push block slidably installed in the center of the support plate further pushes and limits the PLC board when it is placed on the support plate, thus meeting the testing needs of various PLC boards.

Description

Technical Field

[0001] This utility model relates to the field of PLC testing technology, and in particular to a multifunctional PLC test chamber. Background Technology

[0002] A PLC test chamber is a device used to test the core boards of various signalers and sensors. Existing common PLC test chambers are designed for a specific type of PLC board, offering limited testing capabilities. Therefore, the applicant considered integrating multiple structures, as well as the necessary circuit control and software modules for testing, to obtain a multifunctional PLC test chamber.

[0003] However, the applicant noted that, due to the need to achieve multi-functional testing, the PLC boards required are of various sizes and shapes. The existing hardware structure of the test chamber lacks the ability to stably connect and limit PLC boards of different sizes, making it easy for the PLC boards to shift during the testing process. Therefore, the test chamber has been structurally improved, and this application is hereby submitted. Utility Model Content

[0004] This invention provides a multifunctional PLC test chamber that can solve the problem of PLC board displacement during testing in existing PLC test chambers.

[0005] This utility model provides a multifunctional PLC test chamber, including a chamber body, a display screen fixedly installed in the middle of one side of the chamber body, a circuit control component set inside the chamber body, several detection connectors snapped onto the chamber body below the display screen, and a limiting component for limiting the PLC slidably connected to the bottom of the chamber body.

[0006] As a further embodiment of this utility model: the limiting component includes a support plate, both ends of which are bent upwards to form bent portions.

[0007] As a further embodiment of this utility model: a transverse sliding groove is provided on both sides of the top of the support plate, and a push spring is fixedly connected to one end of the inner wall of the transverse sliding groove, and a side push plate is fixedly connected to one end of the push spring.

[0008] As a further embodiment of this utility model: a longitudinal groove is provided at the center of the top of the support plate, and a pushing block is slidably connected inside the longitudinal groove, and a locking element is provided on the top of the pushing block.

[0009] As a further embodiment of this utility model: the locking component includes a locking cap, a locking rod is fixedly connected to the bottom of the locking cap, a pressure plate is fixedly connected to the bottom of the locking rod, an installation groove is provided in the middle of the push block, a traction spring is fixedly connected to the inner wall of the installation groove, one end of the traction spring is fixedly connected to the locking cap, a pressing groove is provided at the bottom of the pressure plate, a limit groove is provided at the bottom of the inner wall of the longitudinal slide groove, and the pressing groove and the limit groove are correspondingly arranged.

[0010] As a further embodiment of this utility model: edge grooves are provided on both sides of the support plate, and sliding frames are slidably connected to the inner walls of the two edge grooves, with a snap-fit ​​frame rotatably connected to one side of the sliding frame.

[0011] As a further embodiment of this utility model, the support plate has several openings in the middle.

[0012] As a further embodiment of this utility model, a lifting handle is fixedly connected to the top of the box.

[0013] As a further embodiment of this utility model: a through groove is provided on the bottom side of the box body, and the width of the through groove is consistent with the height of the bent part.

[0014] As a further embodiment of this utility model, a pull-out protrusion is fixedly connected to the middle of the bent portion.

[0015] As a further embodiment of this utility model: each of the four corners of the bottom of the box is rotatably connected with an adjusting bolt, and each of the four adjusting bolts is fixedly connected with a foot pad.

[0016] As a further embodiment of this utility model: the back of the enclosure has a power inlet and a network interface. The network interface is used to connect to a computer for debugging, and the power inlet is used to connect to a power source.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows: In order to meet various testing needs, this utility model is equipped with a limiting component to stably limit PLC boards of different sizes and shapes. Specifically, the side push plates on both sides are pushed towards the center of the support plate under the action of the push spring; in conjunction with the push block slidably set in the center of the support plate, the PLC board is pushed and limited when placed on the support plate, thereby meeting the testing needs of various PLC boards.

[0018] This utility model is designed to fix the push block and thus prevent the PLC board from moving. A locking component is installed on the top of the push block. The traction spring pulls the locking rod and the pressure plate downward, so that the pressing groove and the limiting groove are engaged, thereby fixing the push block.

[0019] This invention reduces the torsional force exerted by the test connector on the PLC board's signal interface by sliding the sliding bracket to a position corresponding to the PLC board's signal interface and flipping and raising the snap-fit ​​bracket. Attached Figure Description

[0020] Figure 1 This is a perspective view of the present utility model;

[0021] Figure 2 This is a schematic diagram of the unfolded state of the limiting component of this utility model;

[0022] Figure 3 This is a schematic diagram of the locking component of this utility model;

[0023] Figure 4 This is a schematic diagram of the structure of the clip bracket of this utility model.

[0024] Explanation of reference numerals in the attached figures:

[0025] 101. Cabinet; 102. Display screen; 103. Lifting handle; 104. Power switch; 105. Detection connector; 106. Foot pad; 2. Limiting assembly; 201. Support plate; 202. Pull-out protrusion; 203. Bending part; 204. Transverse slide groove; 205. Side push plate; 206. Edge slide groove; 207. Sliding frame; 208. Snap-fit ​​frame; 209. Locking component; 2091. Locking cap; 2092. Locking rod; 2093. Pressure plate; 2094. Mounting groove; 2095. Traction spring; 210. Longitudinal slide groove; 211. Push block; 212. Through port. Detailed Implementation

[0026] The specific embodiments of this utility model are described in detail below, but it should be understood that the scope of protection of this utility model is not limited to the specific embodiments.

[0027] like Figures 1 to 4As shown in the figure, this utility model provides a multifunctional PLC test chamber, including a chamber 101. A display screen 102 is fixedly installed in the middle of one side of the chamber 101. A circuit control component is set inside the chamber 101. Several test connectors 105 are snapped onto the chamber 101 below the display screen 102. A power switch 104 is fixedly installed at one corner of one side of the chamber 101. The circuit control component uses a Siemens series PLC and expansion module as the control core, and is equipped with a power module and a relay control module. It is electrically connected to the display screen 102 and the several test connectors 105 to realize the access test of DC12-24V, GND, 485 signals, frequency signals, analog signals, pulse signals, analog output signals, etc. The specific structure and installation method of the circuit control component are implemented using existing technical means. The back of the chamber 101 has a power input line and a network interface. The network interface is used to connect to a computer for debugging, and the power input line is used to connect to the power supply.

[0028] A limiting component 2 for limiting the PLC is slidably connected to the bottom of the housing 101. The limiting component 2 includes a support plate 201, both ends of which are bent upwards to form bending portions 203. The support plate 201 stores the PLC board, and the bending portions 203 obstruct the PLC board. A pull-out protrusion 202 is fixedly connected to the middle of the bending portion 203 to facilitate the pull-out operation of the limiting component 2 as a whole. A bottom side of the housing 101... A through groove is provided, the width of which is consistent with the height of the bending part 203, so that the limiting component 2 can be retracted into the box 101 when not in use. By aligning the bending part 203 with the through groove of the box 101, the inner cavity of the box 101 is sealed to prevent dust and improve the overall aesthetics of the device. Several openings 212 are provided in the middle of the support plate 201, which reduces the weight of the support plate 201 and optimizes heat dissipation without affecting the structural strength of the support plate 201.

[0029] To improve the ability to stably limit the movement of PLC boards of different sizes and shapes, the support plate 201 has transverse sliding grooves 204 on both sides of its top. A push spring is fixedly connected to one end of the inner wall of the transverse sliding groove 204, and a lateral push plate 205 is fixedly connected to the other end of the push spring. The lateral push plates 205 on both sides are pushed towards the center of the support plate 201 under the action of the push spring, that is, when the PLC board is placed on the support plate 201, it is pushed and limited on both sides. A longitudinal sliding groove 210 is opened at the center of the top of the support plate 201. A push block 211 is slidably connected inside the longitudinal sliding groove 210. The push block 211 is manually pushed and moved by the operator to move the PLC board to a suitable test position.

[0030] To fix the push block 211 and prevent the PLC board from moving, a locking element 209 is provided on the top of the push block 211. The locking element 209 includes a locking cap 2091, a locking rod 2092 fixedly connected to the bottom of the locking cap 2091, and a pressure plate 2093 fixedly connected to the bottom of the locking rod 2092. An installation groove 2094 is provided in the middle of the push block 211. A traction spring 2095 is fixedly connected to the inner wall of the installation groove 2094. One end of the traction spring 2095 is fixedly connected to the locking cap 2091. A pressing groove is provided at the bottom of the pressure plate 2093. A limit groove is provided at the bottom of the inner wall of the longitudinal slide groove 210. The pressing groove and the limit groove are correspondingly set. Under the traction of the traction spring 2095, the locking rod 2092 and the pressure plate 2093 are driven to move down, so that the pressing groove and the limit groove are engaged, thereby fixing the push block 211.

[0031] Because different types of PLC boards have different signal interface locations, when the signal interface of the PLC board under test is located on the side away from the housing 101, the connection using external wiring may cause instability and displacement due to the elasticity or torsional force of the wiring itself. Therefore, this application provides a snap-fit ​​connector 105, allowing it to be detached from the housing 101 and connected to the PLC board in the direction corresponding to the signal interface. Furthermore, both sides of the support plate 201 are... An edge slide groove 206 is provided, and a slide frame 207 is slidably connected to the inner wall of each edge slide groove 206. A snap-fit ​​frame 208 is rotatably connected to one side of the slide frame 207. By sliding the slide frame 207 to the position corresponding to the signal interface of the PLC board and flipping and raising the snap-fit ​​frame 208, the detection connector 105 is snapped and limited after it is connected to the signal interface of the PLC board. This reduces the torsional force of the detection connector 105 on the signal interface of the PLC board and improves the connection stability.

[0032] To facilitate the relocation of the entire device, a lifting handle 103 is fixedly connected to the top of the housing 101; adjusting bolts are rotatably connected to the four corners of the bottom of the housing 101, and foot pads 106 are fixedly connected to the bottom of the four adjusting bolts. By rotating the foot pads 106, the adjusting bolts are rotated, thereby adjusting the extension distance of the adjusting bolts and thus helping to correct the horizontal state of the device.

[0033] In use, the limiting component 2 is removed as a whole by pulling the pull block. The PLC board to be tested is placed on the support plate 201. First, the side push plates 205 on both sides are slid to lock the two ends of the PLC board. Then, the locking cap 2091 is pulled up to drive the locking rod 2092 and the pressure plate to rise, so that the pressing groove is separated from the limiting groove. Then, the push block 211 is slid and pushed to make it contact the side of the PLC board. Then, the PLC board is pushed to move so that the other side of it contacts the bending part 203, thereby limiting the PLC board.

[0034] Then, remove the test connector 105 and connect it to the signal interface of the PLC board. Turn on the device through the power switch 104 and control the operation through the display screen 102 to realize the test of the PLC board.

[0035] The above-disclosed embodiments are only a few specific examples of the present utility model. However, the embodiments of the present utility model are not limited thereto. Any changes that can be conceived by those skilled in the art should fall within the protection scope of the present utility model.

Claims

1. A multifunctional PLC test chamber, characterized in that, The device includes a housing (101), a display screen (102) is fixedly installed on the middle of one side of the housing (101), a circuit control component is provided inside the housing (101), several detection connectors (105) are snapped onto the housing (101) below the display screen (102), and a limit component (2) for limiting the PLC is slidably connected to the bottom of the housing (101).

2. The multifunctional PLC test chamber as described in claim 1, characterized in that, The limiting component (2) includes a support plate (201), both ends of which are bent upward to form a bent portion (203).

3. The multifunctional PLC test chamber as described in claim 2, characterized in that, The support plate (201) has transverse grooves (204) on both sides of its top. A push spring is fixedly connected to one end of the inner wall of the transverse groove (204), and a side push plate (205) is fixedly connected to one end of the push spring.

4. A multifunctional PLC test chamber as described in claim 2, characterized in that, The support plate (201) has a longitudinal groove (210) at the top center, and a push block (211) is slidably connected inside the longitudinal groove (210). A locking element (209) is provided on the top of the push block (211).

5. A multifunctional PLC test chamber as described in claim 4, characterized in that, The locking component (209) includes a locking cap (2091), a locking rod (2092) is fixedly connected to the bottom of the locking cap (2091), a pressure plate (2093) is fixedly connected to the bottom of the locking rod (2092), an installation groove (2094) is provided in the middle of the push block (211), a traction spring (2095) is fixedly connected to the inner wall of the installation groove (2094), one end of the traction spring (2095) is fixedly connected to the locking cap (2091), a pressing groove is provided at the bottom of the pressure plate (2093), and a limiting groove is provided at the bottom of the inner wall of the longitudinal slide groove (210), with the pressing groove and the limiting groove corresponding to each other.

6. A multifunctional PLC test chamber as described in claim 2, characterized in that, The support plate (201) has edge grooves (206) on both sides, and the inner walls of the two edge grooves (206) are slidably connected to sliding frames (207). A snap-fit ​​frame (208) is rotatably connected to one side of the sliding frame (207).

7. A multifunctional PLC test chamber as described in claim 2, characterized in that, The support plate (201) has several openings (212) in the middle.

8. A multifunctional PLC test chamber as described in claim 2, characterized in that, A through groove is provided on one side bottom of the box (101), the width of the through groove is the same as the height of the bent part (203), and a pull-out protrusion (202) is fixedly connected to the middle of the bent part (203).

9. A multifunctional PLC test chamber as described in claim 1, characterized in that, A lifting handle (103) is fixedly connected to the top of the box (101).

10. A multifunctional PLC test chamber as described in claim 1, characterized in that, Adjusting bolts are rotatably connected to the four corners of the bottom of the box (101), and foot pads (106) are fixedly connected to the bottom of the four adjusting bolts.

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