An interface conversion device for automatic testing

Abstract

The utility model relates to automatic test technical field, aims at solving the problem of big pretreatment workload before testing, long preparation time when switching and low efficiency of testing different equipment in prior art, provides an interface conversion equipment of automatic test, including box, the inside of box has ICA receiver, the side of box is hinged with front panel, the other side bolted connection of box has ITA adaptation mechanism, and the inside installation of ITA adaptation mechanism has a plurality of insulation module and a plurality of contactor, and a plurality of contactor is placed into a plurality of insulation module, and ICA receiver is electrically connected to a plurality of contactor, the side away from the box of insulation module is electrically connected with test machine cabinet, and the side away from the insulation module of ICA receiver is electrically connected with the equipment of being measured. The utility model has the beneficial effect of reducing the pretreatment workload before testing, shortening the preparation time between switching the equipment of being measured, improving the efficiency of testing different equipment, effectively preventing dust and iron filings from entering the box and facilitating troubleshooting inside the box.

Description

Technical Field

[0001] This utility model relates to the field of automatic testing technology, and more specifically, to an interface conversion device for automatic testing. Background Technology

[0002] In modern industrial production and scientific research, automatic testing systems, with their high efficiency and accuracy, have become the core means for performance testing and functional verification of various electronic devices and communication modules. Among them, the test cabinet, as the key carrier of the automatic testing system, integrates a variety of high-precision testing instruments such as signal generators, power meters, spectrum analyzers, and matrix switches, which can meet the testing needs of different models and functions of the tested equipment.

[0003] However, in actual testing, due to the variety of models and interface types of the devices under test, when different devices need to be tested, the connection between the test instruments in the test cabinet and the devices under test must be reconfigured. This connection process not only requires manual plugging and unplugging of various cables and adjusting interface adapters, which consumes a lot of manpower and time, but more importantly, after the connection is completed, tedious calibration operations are required to ensure the stability of the test link and the accuracy of the test data. Frequent connection changes and calibration work seriously reduce the overall testing efficiency of the automated test system and make it difficult to adapt to the testing needs of large-scale batch testing or rapid product iteration.

[0004] To address the aforementioned issues, the industry commonly adopts a technical solution that centralizes testing resources on the test cabinet panel and enables rapid interface replacement of test equipment through an interface adapter unit. This solution uses the interface adapter unit to uniformly adapt and convert interfaces of different types of devices under test, reducing direct connection changes between test instruments and devices under test, and improving the convenience of testing to a certain extent. Utility Model Content

[0005] The present invention aims to provide an interface conversion device for automatic testing, so as to solve the problems of large preprocessing workload before testing, long preparation time for switching the device under test, and low efficiency of testing different devices in the prior art.

[0006] The embodiments of this utility model are implemented as follows: This utility model provides an interface conversion device for automatic testing, which includes a housing; An ICA receiver is installed inside the aforementioned enclosure, and the ICA receiver is bolted to the inside of the enclosure. The aforementioned housing has a front panel on one side, and the top edge of the front panel is hinged to the top of the aforementioned housing; On the other side of the aforementioned enclosure, an ITA adapter mechanism is provided. Inside the aforementioned ITA adapter mechanism, several insulating modules and several contactors are installed. Several of the aforementioned contactors are placed into several of the aforementioned insulating modules. The aforementioned ICA receiver is electrically connected to several of the aforementioned contactors. The aforementioned ITA adapter mechanism is bolted to the other side of the aforementioned enclosure. The test cabinet is electrically connected to the side of the aforementioned insulating module away from the aforementioned enclosure, and the device under test is electrically connected to the side of the aforementioned ICA receiver away from the aforementioned insulating module.

[0007] In use, the conversion device is placed between the test cabinet and the device under test. The ITA adapter is electrically connected to the test cabinet through several contactors in several insulating modules. The interface of the device under test passes through the front panel and is electrically connected to the ICA receiver inside the cabinet. Depending on the model and interface of the device under test, the adapter interface can be switched arbitrarily on the ICA receiver.

[0008] The interface conversion device for automatic testing disclosed in this embodiment is equipped with an ICA receiver. Using this interface conversion device for automated testing, switching between different devices under test is convenient and quick, which can reduce the workload of switching interfaces and significantly improve testing efficiency. At the same time, the rotatable front panel facilitates the maintenance of the internal parts of the enclosure by the staff. Thus, this interface conversion device for automatic testing has the beneficial effects of reducing the pre-processing workload before testing, shortening the preparation time between switching devices under test, and significantly improving the efficiency of testing different devices.

[0009] Optionally, the front panel is provided with several windows adapted to the ICA receiver interface.

[0010] With this configuration, the above window settings facilitate the connection of the interface of the device under test to the ICA receiver interface.

[0011] Optionally, the ICA receiver described above has a first receiver, a second receiver, a third receiver, and a fourth receiver, wherein the first receiver, the second receiver, the third receiver, and the fourth receiver are adapted within a plurality of the aforementioned windows on the front panel.

[0012] This configuration, using the aforementioned first receiver, second receiver, third receiver, and fourth receiver, ensures that there are sufficient interfaces for the device under test to connect to the interface.

[0013] Optionally, an insulating block is installed on the side of the first receiver, the second receiver, the third receiver, and the fourth receiver that is away from the ITA adapter mechanism.

[0014] With this configuration, the insulating block provides a mounting base for the internal contacts of the ITA adapter and the ICA receiver and also serves as an insulating protection. Different models of the insulating block can be selected according to the signal type.

[0015] Optionally: The insulating block has a plurality of first contacts on the side away from the ITA adapter mechanism, and the plurality of first contacts are electrically connected to the insulating block and electrically connected to the plurality of insulating modules. The aforementioned ITA adapter mechanism has a plurality of second contacts inside, which are electrically connected to the holes of the aforementioned insulating modules.

[0016] With this configuration, the aforementioned first contact members facilitate connection to the interface of the device under test, and the aforementioned second contact members facilitate connection of the replacement device to the interface of the test cabinet, thereby enabling testing.

[0017] Optionally: The ICA receiver has a wire-binding frame on the side away from the insulating block, and the wire-binding frame has several elongated holes.

[0018] With this configuration, the aforementioned cable tie can be used to fix the wire harness and ground the wires inside the box, making the wire harness inside the box neat and tidy, and facilitating the location of faults inside the box by the staff.

[0019] Optionally, a protective cover is provided on the side of the first receiver, the second receiver, the third receiver and the fourth receiver away from the ITA adapter, and the insulating block is located inside the protective cover.

[0020] With this configuration, the protective cover can be used to protect the aforementioned first contacts, preventing them from oxidizing due to long-term exposure to air, and also preventing dust from adhering to the aforementioned first contacts.

[0021] Optionally, a protective plate is installed in the space adjacent to the above-mentioned insulating module, and the protective plate is connected to the above-mentioned ITA adapter mechanism by screws.

[0022] This design effectively prevents dust and other debris from entering the enclosure and damaging the cables.

[0023] Optionally: The ITA adapter mechanism is provided with a protective cover on the side away from the housing. The protective cover has slidable latch sliders at both ends. The ITA adapter mechanism has rollers on both sides that are adapted to the latch sliders. The protective cover abuts against the side of the ITA adapter mechanism away from the housing. The latch sliders are slidably locked onto the rollers.

[0024] With this configuration, by moving the aforementioned bayonet slider to engage the aforementioned roller, the aforementioned protective cover can be locked and unlocked on the side of the aforementioned ITA adapter mechanism away from the aforementioned housing.

[0025] Optionally, the aforementioned enclosure further comprises a bottom panel, a top panel, a left panel, and a right panel. A first hinge and a second hinge are installed at the external corner between the top panel and the front panel. Both the first hinge and the second hinge are fixedly installed at the external corner between the top panel and the front panel by screws.

[0026] With this configuration, the front panel is connected to the top panel using the first hinge and the second hinge, allowing the front panel of the enclosure to be opened quickly to locate internal faults.

[0027] Optionally: Both ends of the protective cover have slides, and the slides have a first slide groove and a second slide groove in their longitudinal direction. The first slide groove and the second slide groove are respectively fitted with a first slider and a second slider. The first slider and the second slider have locking grooves on the side near the protective cover. Both ends of the ITA adapter mechanism have a first roller and a second roller. The first slider and the second slider are respectively engaged with the first roller and the second roller along the first slide groove and the second slide groove.

[0028] With this configuration, when the protective cover is in close contact with the ITA adapter mechanism, the first slider and the second slider are pushed, causing the first slider and the second slider to move away from each other along the first slide groove and the second slide groove on the slide block, respectively. This causes the locking grooves of the first slider and the second slider to lock the first roller and the second roller, thereby completing the fixation of the protective cover. When testing is required, the protective cover needs to be removed.

[0029] Optionally: A rotary switch is provided on the front panel near the bottom panel, with a portion of the rotary switch located on the front panel and another portion located on the bottom panel.

[0030] With this configuration, the front panel of the aforementioned enclosure can be quickly opened by turning on the rotary switch, exposing the interior of the enclosure and making it easier for staff to locate and repair internal faults.

[0031] In summary, the automatic testing interface conversion device disclosed in this utility model has the beneficial effects of reducing the pre-processing workload before testing, shortening the preparation time between devices under test, significantly improving the efficiency of testing different devices, effectively preventing dust and iron filings from entering the enclosure, and facilitating troubleshooting inside the enclosure. Attached Figure Description

[0032] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 This is a schematic diagram of the structure of an automatic testing interface conversion device according to an embodiment of the present utility model; Figure 2 This is a schematic diagram of the ICA receiver in an embodiment of the present invention; Figure 3 This is an embodiment of the present utility model. Figure 1 Enlarged diagram of point A in the middle.

[0034] Icons: 1-Box, 2-ICA receiver, 3-Front panel, 4-ITA adapter, 5-Insulation module, 6-Contactor, 7-Window, 8-First receiver, 9-Second receiver, 10-Third receiver, 11-Fourth receiver, 12-Insulation block, 13-First contact, 14-Second contact, 15-Wire binding bracket, 16-Elongated hole, 17-Guard plate, 18-Protective cover, 19-Bayonet slider, 20-Roller, 21-Bottom panel, 22-Top panel, 23-Left panel, 24-Right panel, 25-First hinge, 26-Second hinge, 27-Slide block, 28-First slide groove, 29-Second slide groove, 30-First slider, 31-Second slider, 32-Locking groove, 33-First roller, 34-Second roller. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0036] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0037] Example See Figure 1 , Figure 2 and Figure 3 This embodiment proposes an automatic testing interface conversion device, including a housing 1; The ICA receiver 2 is installed inside the housing 1 and is bolted to the inside of the housing 1; One side of the housing 1 has a front panel 3, and the top edge of the front panel 3 is hinged to the top of the housing 1. On the other side of the housing 1, there is an ITA adapter mechanism 4. Inside the ITA adapter mechanism 4, there are several insulating modules 5 and several contactors 6. Several contactors 6 are inserted into several insulating modules 5. The ICA receiver 2 is electrically connected to several contactors 6. The ITA adapter mechanism 4 is bolted to the other side of the housing 1. The side of the insulation module 5 furthest from the enclosure 1 is electrically connected to the test cabinet (not shown in the figure), and the side of the ICA receiver 2 furthest from the insulation module 5 is electrically connected to the device under test (not shown in the figure).

[0038] In use, the conversion device is placed between the test cabinet and the device under test. The ITA adapter 4 is electrically connected to the test cabinet through several contactors 6 in several insulating modules 5. The interface of the device under test passes through the front panel 3 and is electrically connected to the ICA receiver 2 inside the enclosure 1. Depending on the model and interface of the device under test, the adapter interface can be switched arbitrarily on the ICA receiver 2.

[0039] See Figure 1 , Figure 2 and Figure 3 The front panel 3 has several windows 7 that are adapted to the interface of the ICA receiver 2. The windows 7 are designed to facilitate the connection of the interface of the device under test to the interface of the ICA receiver 2.

[0040] The ICA receiver 2 has a first receiver 8, a second receiver 9, a third receiver 10, and a fourth receiver 11. The first receiver 8, the second receiver 9, the third receiver 10, and the fourth receiver 11 are adapted to several windows 7 on the front panel 3. The use of the first receiver 8, the second receiver 9, the third receiver 10, and the fourth receiver 11 facilitates having enough interfaces for the interface connection of the device under test.

[0041] Insulating blocks 12 are installed on the side of the first receiver 8, the second receiver 9, the third receiver 10 and the fourth receiver 11 away from the ITA adapter mechanism 4. The insulating blocks 12 provide a mounting base for the inner contact between the ITA adapter mechanism 4 and the ICA receiver 2 and play an insulating protection role. Different models of insulating blocks 12 can be selected according to the signal type.

[0042] See Figure 1 , Figure 2 and Figure 3The insulating block 12 has a plurality of first contacts 13 on the side away from the ITA adapter mechanism 4, and the plurality of first contacts 13 are electrically connected to the inserted insulating block 12 and electrically connected to a plurality of insulating modules 5. The ITA adapter 4 has several second contacts 14 inside, which are electrically connected to the holes of several insulating modules 5. Several first contacts 13 facilitate connection to the interface of the device under test, and several second contacts 14 facilitate connection of the device to the interface of the test cabinet, thereby realizing the test.

[0043] The ICA receiver 2 has a wire binding frame 15 on the side away from the insulating block 12. The wire binding frame 15 has several elongated holes 16. The wire binding frame 15 can be used to fix the wire harness and ground the wires inside the box, which facilitates the wiring harness inside the overall box 1, making the wiring harness inside the box 1 neat and beautiful, and helping the staff to locate the fault inside the box 1.

[0044] The first receiver 8, the second receiver 9, the third receiver 10 and the fourth receiver 11 are all fitted with protective covers (not shown in the figure) on the side away from the ITA adapter 4. The insulating block 12 is located inside the protective cover. The protective cover can be used to protect the first contacts 13, prevent the first contacts 13 from being exposed to the air for a long time and oxidize, and at the same time prevent dust from adhering to the first contacts 13.

[0045] See Figure 1 , Figure 2 and Figure 3 A protective plate 17 is installed in the empty space of the adjacent insulation module 5. The protective plate 17 is connected to the ITA adapter mechanism 4 by screws. The protective plate 17 effectively prevents dust and other foreign objects from entering the interior of the box 1 and causing damage to the cables.

[0046] A protective cover 18 is provided on the side of the ITA adapter mechanism 4 away from the housing 1. The protective cover 18 has sliding latch sliders 19 at both ends. The ITA adapter mechanism 4 has rollers 20 on both sides that are adapted to the latch sliders 19. The protective cover 18 abuts against the side of the ITA adapter mechanism 4 away from the housing 1. The latch sliders 19 are slidably locked onto the rollers 20. By moving the latch sliders 19 to lock the rollers 20, the protective cover 18 can be locked and unlocked on the side of the ITA adapter mechanism 4 away from the housing 1.

[0047] The enclosure 1 also has a bottom panel 21, a top panel 22, a left panel 23, and a right panel 24. A first hinge 25 and a second hinge 26 are installed at the external corner between the top panel 22 and the front panel 3. The first hinge 25 and the second hinge 26 are both fixedly installed at the external corner between the top panel 22 and the front panel 3 by screws. The front panel 3 is connected to the top panel 22 by the first hinge 25 and the second hinge 26, so that the enclosure 1 can be quickly opened to locate internal faults.

[0048] See Figure 1 , Figure 2 and Figure 3 The protective cover 18 has a slide base 27 at both ends. The slide base 27 has a first slide groove 28 and a second slide groove 29 on its longitudinal direction. The first slide groove 28 and the second slide groove 29 are respectively equipped with a first slider 30 and a second slider 31 that can slide in the first slide groove 28 and the second slide groove 29. The first slider 30 and the second slider 31 have a locking groove 32 on the side of the first slider 30 and the second slider 31 near the protective cover 18. The ITA adapter mechanism 4 has a first roller 33 and a second roller 34 at both ends. The first slider 30 and the second slider 31 are respectively locked onto the first roller 33 and the second roller 34 along the first slide groove 28 and the second slide groove 29. When the protective cover 18 is close to the ITA adapter mechanism 4, the first slider 30 and the second slider 31 are pushed, so that the first slider 30 and the second slider 31 are moved away from each other along the first slide groove 28 and the second slide groove 29 on the slide base 27. Then, the locking groove 32 of the first slider 30 and the second slider 31 respectively locks the first roller 33 and the second roller 34, thereby completing the fixation of the protective cover 18. When testing is required, the protective cover 18 needs to be removed.

[0049] See Figure 1 , Figure 2 and Figure 3 A rotary switch is provided on the front panel 3 near the bottom panel 21. Part of the rotary switch is located on the front panel 3, and another part of the rotary switch is located on the bottom panel 21.

[0050] With this configuration, the front panel 3 of the enclosure 1 can be quickly opened by turning on the rotary switch (not shown in the figure), exposing the interior of the enclosure 1, which makes it easier for staff to locate and repair internal faults in the enclosure 1.

[0051] See Figure 1 , Figure 2 and Figure 3 The interface conversion device for automatic testing disclosed in this embodiment is equipped with an ICA receiver 2. Using this interface conversion device for automated testing, switching between different devices under test is convenient and quick, which can reduce the workload of switching interfaces and significantly improve testing efficiency. At the same time, the rotatable front panel 3 makes it easy for staff to inspect the inside of the housing 1. Thus, the interface conversion device for automatic testing has the beneficial effects of reducing the pre-processing workload before testing, shortening the preparation time between switching devices under test, significantly improving the efficiency of testing different devices, effectively preventing dust and iron filings from entering the housing 1, and facilitating troubleshooting inside the housing 1.

[0052] See Figure 1 , Figure 2 and Figure 3In this embodiment, the housing 1 is the outer shell of the conversion device, used to protect the internal wires of the tool. The front panel 3 of the housing 1 can be opened and closed via the first hinge 25 and the second hinge 26. An interface is provided at the rear of the housing 1. The ITA adapter mechanism 4 is the interface between the conversion device and the test cabinet. It is guided to the test cabinet by the first roller 33 and the second roller 34. The interior of the ITA adapter mechanism 4 can install an 18-slot insulating module 5. Unused slots are protected by a protective plate 17 to prevent dust and iron filings from entering the interior of the housing 1. The ICA receiver 2 is the interface between the conversion device and the device under test. There are four sets, namely the first receiver 8. The second receiver 9, the third receiver 10, and the fourth receiver 11 are distributed within the window 7 of the front panel 3 of the conversion equipment. The ICA receiver 2 is equipped with a protective cover to protect several first contacts 13 inside the ICA receiver 2. The insulating block 12 provides a mounting base for the ITA adapter 4 and several first contacts 13 and several second contacts 14 inside the ICA receiver 2 and provides insulation protection. Different models of insulating modules 5 can be selected according to the signal type. The several first contacts 13 are the contacts of the interfaces at both ends of the conversion equipment. The protective cover 18 is used to protect the several first contacts 13 and several second contacts 14.

[0053] See Figure 1 , Figure 2 and Figure 3 In this embodiment, the protective cover 18 and the insulating module 5 are installed into the ITA adapter mechanism 4, and the ITA adapter mechanism 4 is screwed to the housing 1; the insulating block 12 is installed into the ICA receiver 2, and the tail of the ICA receiver 2 has a wire binding frame 15 which can be used to fix the wire harness and ground the wires inside the housing; after all the ICA receivers 2 are installed, the wires inside the housing 1 are bundled and fixed as a whole, leaving a certain amount of room for movement, so that the opening angle of the front panel 3 of the housing 1 can reach 0° to 130° after opening.

[0054] See Figure 1 , Figure 2 and Figure 3 In this embodiment, the interface conversion device is used for automated testing, which is convenient and quick to switch between different devices under test, reduces the workload of switching interfaces, and significantly improves testing efficiency. The first roller 33 and the second roller 34 can ensure that the conversion device can be smoothly connected to the test cabinet. The design of the protective cover 18 and the protective plate 17 effectively prevents dust and iron filings from entering the interior of the housing 1, and avoids short circuit faults caused by the insulation layer of the internal wires being cut. The front panel 3 of the housing 1 is equipped with a first hinge 25, a second hinge 26 and a rotary switch. The front panel 3 of the housing 1 can be opened by rotating the switch, which is convenient for organizing the internal cables and can also be used for internal fault diagnosis.

[0055] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An automatic testing interface conversion device, characterized in that: Includes the housing (1); The housing (1) is equipped with an ICA receiver (2), which is bolted to the inside of the housing (1); The box (1) has a front panel (3) on one side, and the top edge of the front panel (3) is hinged to the top of the box (1). An ITA adapter mechanism (4) is provided on the other side of the housing (1). Several insulating modules (5) and several contactors (6) are installed inside the ITA adapter mechanism (4). Several contactors (6) are inserted into several insulating modules (5). The ICA receiver (2) is electrically connected to several insulating modules (5). The ITA adapter mechanism (4) is bolted to the other side of the housing (1). The insulating module (5) is electrically connected to a test cabinet on the side away from the housing (1), and the ICA receiver (2) is electrically connected to the device under test on the side away from the insulating module (5).

2. The interface conversion device for automatic testing according to claim 1, characterized in that: The front panel (3) has several windows (7) adapted to the interface of the ICA receiver (2).

3. The interface conversion device for automatic testing according to claim 2, characterized in that: The ICA receiver (2) has a first receiver (8), a second receiver (9), a third receiver (10) and a fourth receiver (11), the first receiver (8), the second receiver (9), the third receiver (10) and the fourth receiver (11) being adapted within a plurality of windows (7) of the front panel (3).

4. The interface conversion device for automatic testing according to claim 3, characterized in that: An insulating block (12) is installed on the side of the first receiver (8), the second receiver (9), the third receiver (10) and the fourth receiver (11) away from the ITA adapter (4).

5. The automatic testing interface conversion device according to claim 4, characterized in that: The insulating block (12) has a plurality of first contacts (13) on the side away from the ITA adapter (4), and the plurality of first contacts (13) are electrically connected to the insulating block (12) and electrically connected to the plurality of insulating modules (5). The ITA adapter (4) has a plurality of second contacts (14) inside, which are electrically connected to the holes of the plurality of insulating modules (5).

6. The interface conversion device for automatic testing according to claim 4, characterized in that: The ICA receiver (2) has a wire tie (15) on the side away from the insulating block (12), and the wire tie (15) has several elongated holes (16).

7. The interface conversion device for automatic testing according to claim 4, characterized in that: The first receiver (8), the second receiver (9), the third receiver (10) and the fourth receiver (11) are all covered with protective covers on the side away from the ITA adapter (4), and the insulating block (12) is located inside the protective cover.

8. The interface conversion device for automatic testing according to claim 1, characterized in that: A protective plate (17) is installed in the empty space adjacent to the insulation module (5), and the protective plate (17) is connected to the ITA adapter mechanism (4) by screws.

9. The interface conversion device for automatic testing according to claim 1, characterized in that: The ITA adapter (4) has a protective cover (18) on the side away from the housing (1). The protective cover (18) has slidable latch sliders (19) at both ends. The ITA adapter (4) has rollers (20) on both sides that are adapted to the latch sliders (19). The protective cover (18) abuts against the side of the ITA adapter (4) away from the housing (1). The latch sliders (19) are slidably locked onto the rollers (20).

10. An automatic testing interface conversion device according to claim 1, characterized in that: The housing (1) also has a bottom panel (21), a top panel (22), a left panel (23) and a right panel (24). A first hinge (25) and a second hinge (26) are installed at the external corner between the top panel (22) and the front panel (3). The first hinge (25) and the second hinge (26) are both fixedly installed at the external corner of the top panel (22) and the front panel (3) by screws.

Images