Conductivity testing device for flexible circuit board for computer keyboard

Abstract

The invention discloses a conductivity testing device for a flexible circuit board for a computer keyboard. The conductivity testing device comprises a conveying track, the pretreatment mechanism is used for dehumidifying the flexible circuit board; the testing mechanism is arranged on one side of the preprocessing mechanism and is used for testing the conductivity of the flexible circuit board; the plurality of conveying mechanisms are movably connected to the conveying track and are used for conveying the flexible circuit boards; the testing mechanism comprises X-axis electric guide rails which are positioned on two sides of the conveying track; the Y-axis electric guide rail is movably connected to the X-axis electric guide rail; the second supporting frame is movably connected to the Y-axis electric guide rail, and a third supporting frame is fixedly connected to the outer wall of the bottom end of the second supporting frame; and the transverse plate is movably connected to the third supporting frame, and a plurality of pull wires are fixedly connected to the outer wall of the bottom end of the transverse plate at equal intervals. The device for testing the conductivity of the flexible circuit board for the computer keyboard has the advantages that automatic conductivity testing can be achieved, and meanwhile it is guaranteed that the flexible circuit board is not damaged.

Description

Technical Field

[0001] The present invention relates to the technical field of flexible circuit boards, and in particular to a conductivity testing device for a flexible circuit board used in a computer keyboard. Background Art

[0002] Desktop or laptop keyboards typically consist of flexible circuit boards (FPCBs) and corresponding keys. Therefore, the conductivity of each key on the FPCB must be tested before shipment. Based on the above description, the key to effective continuity testing of FPCBs used in computer keyboards is crucial.

[0003] Currently, continuity testing for flexible circuit boards used in keyboards relies primarily on manual point testing with a multimeter or general-purpose flying probe testing equipment. This results in low efficiency (single-point testing takes 2-3 seconds) and missed key detections. Furthermore, excessive force applied during point testing can damage the test points on the flexible circuit board, potentially damaging the board. Summary of the Invention

[0004] The present invention discloses a conductivity test device for a flexible circuit board for a computer keyboard, aiming to solve the problems of low efficiency and missed key detection in manual detection, and the technical problem that the detection points of the flexible circuit board may be damaged, resulting in damage to the flexible circuit board.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: A device for testing the conductivity of a flexible circuit board for a computer keyboard comprises a conveying track; a pretreatment mechanism for dehumidifying the flexible circuit board; a testing mechanism disposed on one side of the pretreatment mechanism for testing the conductivity of the flexible circuit board; and a plurality of conveying mechanisms movably connected to the conveying track for conveying the flexible circuit board. The testing mechanism includes: an X-axis electric guide rail, located on both sides of the conveying track; a Y-axis electric guide rail, movably connected to the X-axis electric guide rail; a support frame two, movably connected to the Y-axis electric guide rail, and the bottom outer wall of the support frame two is fixedly connected to the support frame three; a cross plate, movably connected to the support frame three, the bottom outer wall of the cross plate is equidistantly fixed with multiple traction lines, the top outer wall of the support frame three is fixedly connected with a gas rod, and the gas rod is used to drive the cross plate to move horizontally; multiple sleeve frames one, equidistantly fixed to the bottom outer wall of the support frame three, the bottom inner wall of each sleeve frame one is respectively fixedly connected with a probe, the bottom outer wall of each probe is respectively fixedly connected with an elastic metal sheet, one side outer wall of each elastic metal sheet is respectively fixedly connected with an insulating sleeve, and the ends of the multiple traction lines are respectively fixedly sleeved on the multiple insulating sleeves; a conductivity tester, fixedly connected to one side outer wall of the support frame two, and the multiple detection ends of the conductivity tester are respectively connected to the multiple probes through wires; The testing mechanism further includes: a slider fixedly connected to the top outer wall of the horizontal plate, and the output end of the gas rod fixedly connected to one side outer wall of the slider; a waist-shaped groove penetrating the top inner wall of the support frame three, and the slider movably connected to the waist-shaped groove; a plurality of limit sleeves, respectively fixedly connected to one side outer wall of each sleeve, and the traction line correspondingly passes through the plurality of limit sleeves; The conveying mechanism includes: multiple support seats for placing flexible circuit boards; a slide seat fixedly connected to the bottom outer wall of each support seat and equidistantly movably connected to the conveying track; a groove provided on the top inner wall of each support seat, and the flexible circuit board is placed in the groove.

[0006] A testing mechanism is provided, in which the surface of the flexible circuit board is mainly contacted by an elastic metal sheet, and the conductivity test is realized through analysis by a conductivity tester. The translation drive of the Y-axis electric guide rail and the X-axis electric guide rail can match the positions of multiple elastic metal sheets with multiple detection points, and the conductivity detection results and the analysis of the conductivity point positions are used to determine whether they match the key positions to realize automatic conductivity detection. Compared with the simultaneous detection of a large number of detection points, this detection method has a higher success rate and a lower failure rate. In addition, compared with the detection method of direct up and down repeated displacement, the contact detection structure based on the elastic metal sheet can avoid excessive extrusion pressure and ensure the stability of the contact. Therefore, while realizing automatic conductivity detection, it also avoids damage to the flexible circuit board.

[0007] In a preferred embodiment, the top of the flexible circuit board is higher than the top outer wall of the support base; the conveying mechanism further comprises: a rubber strip, which is adhered to both the flexible circuit board and the top outer wall of the support base and is located on both sides of the flexible circuit board; and two racks, which are symmetrically fixedly connected to the two side outer walls of the support base; The pretreatment mechanism includes: a plurality of hollow rollers arranged in parallel; a plurality of moisture-absorbing sleeves fixedly sleeved on the outer walls of the hollow rollers; two gear rings symmetrically fixedly connected to the circumferential outer wall of each hollow roller and symmetrically distributed on both sides of the moisture-absorbing sleeve, the gear rings meshing with racks at corresponding positions; a bearing frame, with both ends of each hollow roller movably connected to the bearing frame; The pretreatment mechanism further includes: a spiral blade fixedly connected to the inner wall of the hollow drum; a support pipe fixedly connected to both ends of the hollow drum; a loop pipe simultaneously sleeved on the outer ends of the plurality of support pipes, and a movable sealing sleeve is provided at the connection between the loop pipe and the support pipe; a coolant circulator fixedly connected to both ends of the loop pipe, and the coolant circulates between the loop pipe and the hollow drum; The pretreatment mechanism also includes: a hot air blower for continuously delivering hot air; a hot air pipe fixedly connected to the output end of the hot air blower, and one end of the hot air pipe is fixedly connected to a U-shaped support pipe, and the U-shaped support pipe is located between the two hollow drums.

[0008] By setting up a pretreatment mechanism, the surface of the flexible circuit board is easily affected by the storage environment and becomes damp before the conductivity test, and moisture will directly affect the conductivity test result of the flexible circuit board. Based on the setting of the pretreatment mechanism, before entering the formal conductivity test, the moisture will be removed under the rapid moisture absorption and hot air dehumidification structure. This method has higher dehumidification efficiency and better dehumidification effect. Based on the setting of the coolant circulation machine, the coolant circulates inside the hollow drum, and the coolant conducts heat through the moisture-absorbing sleeve to ensure that the moisture-absorbing sleeve maintains a relatively low temperature. The flexible circuit board can be quickly cooled after drying to reduce the possibility of deformation.

[0009] In a preferred embodiment, the pretreatment mechanism further comprises: a plurality of nozzles, the input ends of which are respectively fixedly connected to flexible branch pipes, and the plurality of flexible branch pipes are simultaneously fixedly connected to the U-shaped support pipe; a first support frame, fixedly connected to the bearing frame; The pretreatment mechanism further includes: a vertical plate, movably inserted into the top of the support frame 1, and the outer walls on both sides of the vertical plate facing each other are respectively fixedly connected to a plurality of latch teeth 1, and the top outer wall of the vertical plate is fixedly connected to the top plate; a hydraulic rod, fixedly connected to the top outer wall of the support frame 1, and its output end is fixedly connected to the bottom outer wall of the top plate; The pretreatment mechanism also includes: a plurality of limiting rods, which are fixedly connected to the top outer wall of the support frame one and movably inserted into the top plate; two support rods, which are respectively rotatably connected to the support frame one, and the outer wall of one side of each support rod is respectively fixedly connected to the mounting frame, and a plurality of nozzles are respectively fixedly connected to the mounting frame.

[0010] When the test is stopped, the retraction of the hydraulic rod drives the vertical plate to move down along the support frame, and at the same time drives multiple nozzles to move from the bottom to the two sides, so that the air outlet faces the desiccant sleeve, and then the hollow drum continues to rotate through the translation of the conveying mechanism. At this time, the hot air continues to act on the surface of the desiccant sleeve, so that the desiccant sleeve can be dried based on the original hot air structure to ensure the sustainable use of the desiccant sleeve. At the same time, this drying method does not require the removal of the desiccant sleeve, reducing the difficulty of operation.

[0011] As can be seen from the above, a conductivity test device for a flexible circuit board for a computer keyboard includes a conveying track, including: a pretreatment mechanism for dehumidifying the flexible circuit board; a testing mechanism, which is arranged on one side of the pretreatment mechanism and is used to test the conductivity of the flexible circuit board; a plurality of conveying mechanisms, which are movably connected to the conveying track and are used to convey the flexible circuit board; the testing mechanism includes: an X-axis electric guide rail, which is located on both sides of the conveying track; a Y-axis electric guide rail, which is movably connected to the X-axis electric guide rail; a support frame 2, which is movably connected to the Y-axis electric guide rail, and the outer wall of the bottom end of the support frame 2 is fixedly connected to the support frame 3; a cross plate, which is movably connected to the support On the third support frame, a plurality of traction lines are fixedly connected to the outer wall of the bottom end of the horizontal plate at equal intervals, and a gas rod is fixedly connected to the outer wall of the top end of the third support frame, and the gas rod is used to drive the horizontal plate to move in translation; a plurality of sleeve frames are fixedly connected to the outer wall of the bottom end of the third support frame at equal intervals, and a probe is fixedly connected to the inner wall of the bottom end of each sleeve frame, and the outer wall of the bottom end of each probe is fixedly connected to an elastic metal sheet, and an insulating sleeve is fixedly connected to the outer wall of one side of each elastic metal sheet, and the ends of the plurality of traction lines are fixedly sleeved on the plurality of insulating sleeves; a conductivity tester is fixedly connected to the outer wall of one side of the second support frame, and the plurality of detection ends of the conductivity tester are respectively connected to the plurality of probes via wires. The conductivity test device for a flexible circuit board for a computer keyboard provided by the present invention has the technical effect of realizing automatic conductivity testing while ensuring that the flexible circuit board is not damaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the overall structure of a conductivity test device for a flexible circuit board used in a computer keyboard proposed by the present invention.

[0013] Figure 2 This is a schematic diagram of the overall structure of a test mechanism for a flexible circuit board conductivity test device for a computer keyboard proposed by the present invention.

[0014] Figure 3 This is a schematic diagram of the disassembly of the test mechanism of a flexible circuit board conductivity test device for a computer keyboard proposed by the present invention.

[0015] Figure 4 This is a schematic diagram of the contact area of the test mechanism of the flexible circuit board conductivity test device for a computer keyboard proposed by the present invention.

[0016] Figure 5 This is a schematic diagram of the disassembly of the conveying mechanism of the flexible circuit board conductivity testing device for a computer keyboard proposed by the present invention.

[0017] Figure 6 This is a schematic diagram of the overall structure of a preprocessing mechanism of a flexible circuit board conductivity test device for a computer keyboard proposed by the present invention.

[0018] Figure 7 This is an overall schematic diagram of the moisture absorption structure of the pretreatment mechanism of the flexible circuit board conductivity test device for a computer keyboard proposed by the present invention.

[0019] Figure 8 This is a schematic diagram of the internal structure of a hollow drum in a conductivity test device for a flexible circuit board used in a computer keyboard proposed by the present invention.

[0020] Figure 9 This is an overall schematic diagram of the drying structure of the pretreatment mechanism of the conductivity testing device for a flexible circuit board used in a computer keyboard proposed by the present invention.

[0021] In the figure: 1. Pretreatment mechanism; 2. Testing mechanism; 3. Conveying mechanism; 4. Conveying track; 101. Hot air blower; 102. Hot air pipe; 103. Loop pipe; 104. Support frame 1; 105. Cooling liquid circulation machine; 106. Bearing frame; 107. Gear ring; 108. Moisture absorbing sleeve; 109. Movable sealing sleeve; 110. Support pipe; 111. Hollow drum; 112. Spiral blade; 113. Limiting rod; 114. Hydraulic rod; 115. Top plate; 116. Vertical plate; 117. Gear 1; 118. Nozzle; 119. Flexible branch pipe; 120. U-shaped support Tube; 121, mounting frame; 122, support rod; 123, gear 2; 201, X-axis electric guide rail; 202, Y-axis electric guide rail; 203, support frame 2; 204, continuity tester; 205, wire; 206, slider; 207, cross plate; 208, traction line; 209, support frame 3; 210, sleeve frame 1; 211, waist-shaped groove; 212, gas rod; 213, probe; 214; elastic metal sheet; 215, insulating sleeve; 216, limit sleeve; 301, rubber strip; 302, groove; 303, support seat; 304, rack; 305, slide seat. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0023] The present invention discloses a conductivity testing device for a flexible circuit board for a computer keyboard, which is mainly used in the scenario of conductivity testing of a flexible circuit board.

[0024] Reference Figures 1-4 , a conductivity test device for a flexible circuit board for a computer keyboard, comprising: Conveyor track 4; Pretreatment mechanism 1, used for dehumidifying the flexible circuit board; The testing mechanism 2 is provided on one side of the pre-processing mechanism 1 and is used to test the conductivity of the flexible circuit board; Multiple conveying mechanisms 3, movably connected to the conveying track 4, for conveying the flexible circuit board; Test facility 2 includes: X-axis electric guide rails 201 are located on both sides of the conveying track 4; The Y-axis electric guide rail 202 is movably connected to the X-axis electric guide rail 201; The second support frame 203 is movably connected to the Y-axis electric guide rail 202, and the outer wall of the bottom end of the second support frame 203 is fixedly connected to the third support frame 209; The horizontal plate 207 is movably connected to the support frame 3 209. The bottom outer wall of the horizontal plate 207 is fixedly connected to multiple traction lines 208 at equal intervals. The top outer wall of the support frame 3 209 is fixedly connected to a gas rod 212, and the gas rod 212 is used to drive the horizontal plate 207 to move horizontally; Multiple sleeves 210 are fixedly connected to the bottom outer wall of the support frame 3 209 at equal intervals. The bottom inner wall of each sleeve 210 is fixedly connected to a probe 213, and the bottom outer wall of each probe 213 is fixedly connected to an elastic metal sheet 214. The outer wall of one side of each elastic metal sheet 214 is fixedly connected to an insulating sleeve 215, and the ends of the multiple pull lines 208 are fixedly sleeved on the multiple insulating sleeves 215. The conductivity tester 204 is fixedly connected to the outer wall of one side of the support frame 203, and the multiple detection ends of the conductivity tester 204 are respectively connected to the multiple probes 213 through the wires 205. The test mechanism 2 mainly contacts the surface of the flexible circuit board through the elastic metal sheet 214, and realizes the conductivity test through the analysis of the conductivity tester 204. Based on the consistent spacing of the key positions in the keyboard, the translation drive of the Y-axis electric guide rail 202 can change the position of the first key detection position in each row, and the translation drive of the X-axis electric guide rail 201 can move the positions of the multiple elastic metal sheets 214 to the next row for detection, and determine whether the conductivity matches the key position through the analysis of the conductivity test results and the conduction point position to realize automatic detection of conductivity. Compared with the simultaneous detection of a large number of detection points, this detection method has a higher success rate and fault detection. The rate is lower. In addition, the cross plate 207 is driven to translate by the extension and contraction of the gas rod 212, which can involve the traction line 208 and electrically bend multiple elastic metal sheets 214. With the translation and re-contact test, the cross plate 207 returns to its position, and the restriction of the traction line 208 on the elastic metal sheet 214 disappears. Under the rebound function of the elastic metal sheet 214, it contacts the detection point of the second row again. Compared with the detection method of direct up and down repeated displacement, the up and down repeated displacement point contact method of this detection structure may cause high extrusion pressure, causing damage to the flexible circuit board, and low extrusion pressure may cause poor contact. This method changes from longitudinal to oblique force contact to avoid excessive extrusion pressure, and based on the elastic effect, it can also ensure the stability of contact. Therefore, while realizing automatic conductivity detection, it also avoids damage to the flexible circuit board.

[0025] Reference Figure 4 In a preferred embodiment, the testing mechanism 2 further includes: The slider 206 is fixedly connected to the top outer wall of the horizontal plate 207, and the output end of the gas rod 212 is fixedly connected to one side outer wall of the slider 206; A waist-shaped groove 211 is provided through the inner wall of the top of the support frame 3 209, and the slider 206 is movably connected to the waist-shaped groove 211; Multiple limiting sleeves 216 are respectively fixedly connected to the outer wall of one side of each sleeve 210, and the traction line 208 passes through multiple limiting sleeves 216 accordingly. The setting of the limiting sleeves 216 can limit the position of each traction line 208 and play a knotting role, ensuring that the bottom range of the traction line 208 continues to act longitudinally on the multiple elastic metal sheets 214 to ensure the bending angle of the elastic metal sheet 214.

[0026] Reference Figure 5 In a preferred embodiment, the conveying mechanism 3 includes: Multiple support seats 303 for placing flexible circuit boards; The slide 305 is fixedly connected to the outer wall of the bottom end of each support base 303 and is equidistantly and movably connected to the conveying track 4; A groove 302 is provided on the inner wall of the top end of each support seat 303. The flexible circuit board is placed in the groove 302. The inner wall of the groove 302 provides a limit for the four sides of the flexible circuit board, and the adhesive strip 301 is used to adhere to ensure that the flexible circuit board does not fall out of the groove 302, thereby achieving stability of the flexible circuit board for the subsequent process.

[0027] Reference Figure 5 In a preferred embodiment, the top of the flexible circuit board is higher than the top outer wall of the support base 303; The conveying mechanism 3 also includes: The adhesive strip 301 is adhered to the outer wall of the top of the flexible circuit board and the support base 303 at the same time, and is located on both sides of the flexible circuit board; The two racks 304 are symmetrically fixedly connected to the outer walls of the support base 303 on both sides.

[0028] Reference Figure 6-Figure 8 In a preferred embodiment, the pre-processing mechanism 1 includes: A plurality of hollow rollers 111 are arranged in parallel; A plurality of moisture absorbing sleeves 108 are respectively fixedly sleeved on the outer wall of the hollow drum 111; Two gear rings 107 are symmetrically fixedly connected to the circumferential outer wall of each hollow drum 111 and symmetrically distributed on both sides of the moisture-absorbing sleeve 108. The gear rings 107 are engaged with the racks 304 at the corresponding positions. Before the conductivity test, the flexible circuit board is easily affected by the storage environment and the surface of the flexible circuit board is damp, and the moisture will directly affect the conductivity test result of the flexible circuit board. Based on the setting of the pretreatment mechanism 1, before entering the formal conductivity test, it will pass through multiple moisture-absorbing sleeves 108 in sequence. The surface of the flexible circuit board contacts the outer surface of the moisture-absorbing sleeve 108 to achieve rapid moisture absorption. During the process, as the conveying mechanism 3 moves, the rack 304 engages with the gear ring 107, directly pushing the hollow drum 111 to rotate. Under this structure, the rotation frequency of the hollow drum 111 is consistent with the translation frequency of the flexible circuit board, thereby ensuring the moisture absorption effect while avoiding the displacement of the flexible circuit board caused by large resistance during the moisture absorption process; The bearing frame 106 , both ends of each hollow roller 111 are movably connected to the bearing frame 106 .

[0029] Reference Figure 6-Figure 8 In a preferred embodiment, the pre-processing mechanism 1 further comprises: The spiral blade 112 is fixedly connected to the inner wall of the hollow drum 111; The support tube 110 is fixedly connected to both ends of the hollow drum 111; The loop pipe 103 is simultaneously sleeved on the outer ends of the plurality of support pipes 110 , and a movable sealing sleeve 109 is provided at the connection between the loop pipe 103 and the support pipe 110 ; The cooling liquid circulator 105 is fixedly connected to both ends of the loop pipe 103 , and the cooling liquid flows between the loop pipe 103 and the hollow drum 111 .

[0030] Reference Figure 9 In a preferred embodiment, the pre-processing mechanism 1 further comprises: Hot air blower 101, for continuously delivering hot air; The hot air pipe 102 is fixedly connected to the output end of the hot air blower 101, and one end of the hot air pipe 102 is fixedly connected to a U-shaped support pipe 120. The U-shaped support pipe 120 is located between the two hollow rollers 111. Based on the setting of the hot air blower 101, the hot air is transported through the hot air pipe 102 and the U-shaped support pipe 120 and interspersed between the two adjacent hollow rollers 111. Compared with direct drying with the hot air blower 101, the moisture absorption in the front can quickly absorb external moisture, and the drying in the middle can quickly process the residual moisture and reduce the amount of water absorbed during subsequent moisture absorption. This method prevents moisture in the air from adhering to the flexible circuit board again. The dehumidification efficiency is higher and the dehumidification effect is better. Based on the setting of the coolant circulation machine 105, the coolant circulates inside the hollow drum 111. Based on the setting of the spiral blades 112, the coolant is better in contact with the inner wall of the hollow drum 111 and the residence time of the coolant is extended to optimize the cooling effect. The coolant conducts heat through the moisture-absorbing sleeve 108 to ensure that the moisture-absorbing sleeve 108 maintains a relatively low temperature. The flexible circuit board can be quickly cooled after drying to reduce the possibility of deformation.

[0031] Reference Figure 9 In a preferred embodiment, the pre-processing mechanism 1 further comprises: Multiple nozzles 118, each of which has a flexible branch pipe 119 fixedly connected to its input end, and multiple flexible branch pipes 119 are also fixedly connected to the U-shaped support pipe 120; The support frame 104 is fixedly connected to the bearing frame 106.

[0032] Reference Figure 9 In a preferred embodiment, the pre-processing mechanism 1 further comprises: The vertical plate 116 is movably inserted into the top of the support frame 104, and the outer walls on both sides of the vertical plate 116 are fixedly connected to a plurality of latch teeth 117, and the outer wall of the top of the vertical plate 116 is fixedly connected to the top plate 115; The hydraulic rod 114 is fixedly connected to the top outer wall of the support frame 104 , and its output end is fixedly connected to the bottom outer wall of the top plate 115 .

[0033] Reference Figure 1 and Figure 3 In a preferred embodiment, the pre-processing mechanism 1 further comprises: A plurality of limiting rods 113 are fixedly connected to the top outer wall of the support frame 104 and movably inserted into the top plate 115; Two support rods 122 are respectively rotatably connected to the support frame 104, and the outer wall of one side of each support rod 122 is respectively fixedly connected to the mounting frame 121, and multiple nozzles 118 are respectively fixedly connected to the mounting frame 121. Hot air is ejected by the multiple nozzles 118 and acts on the surface of the flexible circuit board that moves horizontally at the bottom. The multiple nozzles 118 are fixed by the two mounting frames 121 to maintain the same spacing between adjacent nozzles 118 to achieve uniform heating. When the test is stopped, the vertical plate 116 is moved downward in contact with the support frame 104 by the retraction of the hydraulic rod 114, and the two support rods 1 are driven by the engagement of the tooth 117 and the tooth 2 123. 22 rotates outward at the same time, so that the two mounting frames 121 move to both sides respectively, and at the same time drives the multiple nozzles 118 to move from the bottom to the positions on both sides, so that the air outlet faces the desiccant sleeve 108, and then the flexible circuit board on each conveying mechanism 3 is removed, and the hollow drum 111 is continued to be driven to rotate by the translation of the conveying mechanism 3. At this time, the hot air continues to act on the surface of the desiccant sleeve 108, and the desiccant sleeve 108 is evenly heated through rotation, so that the desiccant sleeve 108 can be dried based on the original hot air structure to ensure the sustainable use of the desiccant sleeve 108. At the same time, this drying method does not require the desiccant sleeve 108 to be removed for operation, thereby reducing the difficulty of operation.

[0034] Working principle: The test mechanism 2 mainly contacts the surface of the flexible circuit board through the elastic metal sheet 214, and realizes the conductivity test through the analysis of the conductivity tester 204. Based on the consistent spacing of the keys in the keyboard, the translation drive of the Y-axis electric guide rail 202 can change the position of the first key detection position in each row, and the translation drive of the X-axis electric guide rail 201 can move the positions of multiple elastic metal sheets 214 to the next row for detection, and determine whether they match the key position through the analysis of the conductivity test results and the conduction point to realize automatic conductivity detection. Compared with the simultaneous detection of a large number of detection points, this detection method has a higher success rate and a lower failure rate. In addition, the horizontal plate 207 is driven to translate by the extension and contraction of the gas rod 212, which can involve The traction line 208 is used to electrically bend multiple elastic metal sheets 214. With the translation and re-contact test, the horizontal plate 207 returns to its position, and the restriction of the traction line 208 on the elastic metal sheet 214 disappears. Under the rebound function of the elastic metal sheet 214, it contacts the detection point of the second row again. Compared with the detection method of direct up and down repeated displacement, the up and down repeated displacement point contact method of this detection structure may cause high extrusion pressure, causing damage to the flexible circuit board, and low extrusion pressure may cause poor contact. This method changes from longitudinal to oblique force contact to avoid excessive extrusion pressure, and based on the elastic effect, it can also ensure the stability of the contact. Therefore, while realizing automatic conductivity detection, it also avoids damage to the flexible circuit board.

[0035] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A device for testing the conductivity of a flexible circuit board for a computer keyboard, comprising a conveying track (4); characterized in that: Also includes: A pre-treatment mechanism (1) for performing dehumidification treatment on the flexible circuit board; A testing mechanism (2), arranged on one side of the pre-processing mechanism (1), is used to test the conductivity of the flexible circuit board; A plurality of conveying mechanisms (3) are movably connected to the conveying track (4) and are used to convey the flexible circuit boards; The testing mechanism (2) comprises: X-axis electric guide rails (201) are located on both sides of the conveying track (4); A Y-axis electric guide rail (202) is movably connected to the X-axis electric guide rail (201); The second support frame (203) is movably connected to the Y-axis electric guide rail (202), and the outer wall of the bottom end of the second support frame (203) is fixedly connected to the third support frame (209); The horizontal plate (207) is movably connected to the support frame three (209), the bottom outer wall of the horizontal plate (207) is fixedly connected to a plurality of traction lines (208) at equal intervals, and the top outer wall of the support frame three (209) is fixedly connected to a gas rod (212), and the gas rod (212) is used to drive the horizontal plate (207) to move horizontally; A plurality of sleeves (210) are fixedly connected to the outer wall of the bottom end of the support frame (209) at equal intervals, the inner wall of the bottom end of each sleeve (210) is fixedly connected to a probe (213), the outer wall of the bottom end of each probe (213) is fixedly connected to an elastic metal sheet (214), the outer wall of one side of each elastic metal sheet (214) is fixedly connected to an insulating sleeve (215), and the ends of the plurality of traction lines (208) are fixedly sleeved on the plurality of insulating sleeves (215); The conductivity tester (204) is fixedly connected to an outer wall of one side of the second support frame (203), and multiple detection ends of the conductivity tester (204) are respectively connected to multiple probes (213) through wires (205).

2. A continuity test device for a flexible circuit board for a computer keyboard according to claim 1, characterized in that: The testing mechanism (2) further comprises: The slider (206) is fixedly connected to the top outer wall of the horizontal plate (207), and the output end of the gas rod (212) is fixedly connected to the outer wall of one side of the slider (206); A waist-shaped groove (211) is provided through the inner wall of the top end of the support frame 3 (209), and the slider (206) is movably connected to the waist-shaped groove (211); A plurality of limiting sleeves (216) are respectively fixedly connected to the outer wall of one side of each sleeve (210), and the traction line (208) passes through the plurality of limiting sleeves (216) accordingly.

3. A continuity test device for a flexible circuit board for a computer keyboard according to claim 1, characterized in that: The conveying mechanism (3) comprises: A plurality of support seats (303) for placing flexible circuit boards; A slide (305) is fixedly connected to the outer wall of the bottom end of each support seat (303) and is equidistantly and movably connected to the conveying track (4); A groove (302) is provided on the inner wall of the top end of each support seat (303), and the flexible circuit board is placed in the groove (302).

4. A continuity test device for a flexible circuit board for a computer keyboard according to claim 1, characterized in that: The top end of the flexible circuit board is higher than the top outer wall of the support seat (303); The conveying mechanism (3) further comprises: The adhesive strip (301) is adhered to the outer wall of the top of the flexible circuit board and the support seat (303) at the same time, and is located on both sides of the flexible circuit board; The two racks (304) are symmetrically fixedly connected to the outer walls on both sides of the support base (303).

5. A continuity test device for a flexible circuit board for a computer keyboard according to claim 4, characterized in that: The pre-processing mechanism (1) comprises: A plurality of hollow rollers (111) are arranged in parallel; A plurality of moisture-absorbing sleeves (108) are respectively fixedly sleeved on the outer wall of the hollow drum (111); Two toothed rings (107) are symmetrically fixedly connected to the circumferential outer wall of each hollow roller (111) and symmetrically distributed on both sides of the moisture-absorbing sleeve (108), and the toothed rings (107) are meshed with the racks (304) at corresponding positions; The bearing frame (106) has two ends of each hollow roller (111) movably connected to the bearing frame (106).

6. A continuity test device for a flexible circuit board for a computer keyboard according to claim 5, characterized in that: The pre-processing mechanism (1) further comprises: A spiral blade (112) is fixedly connected to the inner wall of the hollow drum (111); A support tube (110) is fixedly connected to both ends of the hollow drum (111); The loop pipe (103) is simultaneously sleeved on the outer ends of the plurality of support pipes (110), and a movable sealing sleeve (109) is provided at the connection between the loop pipe (103) and the support pipe (110); The cooling liquid circulator (105) is fixedly connected to both ends of the loop pipe (103), and the cooling liquid circulates between the loop pipe (103) and the hollow drum (111).

7. A continuity test device for a flexible circuit board for a computer keyboard according to claim 6, characterized in that: The pre-processing mechanism (1) further comprises: A hot air blower (101) for continuously delivering hot air; The hot air pipe (102) is fixedly connected to the output end of the hot air blower (101), and one end of the hot air pipe (102) is fixedly connected to a U-shaped support pipe (120), and the U-shaped support pipe (120) is located between the two hollow rollers (111).

8. The device for testing the conductivity of a flexible circuit board for a computer keyboard according to claim 5, wherein: The pre-processing mechanism (1) further comprises: Multiple nozzles (118), each having an input end fixedly connected to a flexible branch pipe (119), and the multiple flexible branch pipes (119) are simultaneously fixedly connected to a U-shaped support pipe (120); The support frame 1 (104) is fixedly connected to the bearing frame (106).

9. A continuity test device for a flexible circuit board for a computer keyboard according to claim 8, characterized in that: The pre-processing mechanism (1) further comprises: A vertical plate (116) is movably inserted into the top of the support frame (104), and the outer walls on both sides of the vertical plate (116) facing each other are respectively fixedly connected with a plurality of latch teeth (117), and the outer wall of the top of the vertical plate (116) is fixedly connected with the top plate (115); The hydraulic rod (114) is fixedly connected to the top outer wall of the support frame (104), and its output end is fixedly connected to the bottom outer wall of the top plate (115).

10. A continuity test device for a flexible circuit board for a computer keyboard according to claim 9, characterized in that: The pre-processing mechanism (1) further comprises: A plurality of limiting rods (113) are fixedly connected to the top outer wall of the support frame (104) and movably inserted into the top plate (115); Two support rods (122) are rotatably connected to the support frame (104), and one side outer wall of each support rod (122) is fixedly connected to the mounting frame (121), and multiple nozzles (118) are fixedly connected to the mounting frame (121).

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