Sucker support of dispensing device and dispensing device

Abstract

The utility model relates to a suction cup support of a dispensing device and the dispensing device. The suction cup support comprises a mounting support and a plurality of vacuum suction cups, the mounting support is mounted on a running track of the dispensing device and provided with an air suction channel, and the air suction channel is arranged in the length direction of the mounting support; the vacuum suction cup is arranged in the length direction of the installation support and communicates with the air suction channel. The suction cup support is installed on the operation track of the dispensing device through the installation support, the vacuum suction cup can be driven to move up and down and left and right through the operation track, and therefore the liquid crystal display screen can be transferred to a material disc transferring mechanism from a transmission carding mechanism of the dispensing device, and manual intervention is not needed in the whole transferring process; the labor intensity of operators can be reduced, the damage probability of the liquid crystal display screen can also be reduced, for example, the liquid crystal display screen can be prevented from falling off, and the production efficiency is improved.

Description

Technical Field

[0001] The present application relates to the field of screen processing technology, and in particular to a suction cup bracket and a dispensing device for a dispensing device. Background Art

[0002] Liquid crystal displays (LCDs) are a type of display used for televisions and computers. They are increasingly popular among consumers due to their low power consumption, compact size, and low radiation. During both production and subsequent LCD repair, adhesive dispensing is required on the back panel of the LCD to provide adhesion, potting, insulation, and securement.

[0003] However, before dispensing glue on the LCD screen, the operator is required to move the LCD screen from the transmission combing mechanism to the tray transfer mechanism, which not only increases the labor intensity of the operator, but also increases the probability of damage to the LCD screen. Summary of the Invention

[0004] Based on this, it is necessary to provide a suction cup bracket and a glue dispensing device for a glue device to address the above technical problems.

[0005] A suction cup bracket for a dispensing device, comprising:

[0006] A mounting bracket is mounted on the running track of the dispensing device and has an air suction channel, wherein the air suction channel is arranged along the length direction of the mounting bracket; and

[0007] A plurality of vacuum suction cups are arranged along the length direction of the mounting bracket and are communicated with the suction channel.

[0008] The above-mentioned suction cup bracket is installed on the running track of the dispensing device through the installation bracket. The running track can be used to drive the vacuum suction cup to move up and down and left and right, so that the LCD screen can be transferred from the transmission combing mechanism of the dispensing device to the material tray transfer mechanism. The entire transfer process does not require manual intervention, which can reduce the labor intensity of the operator and the chance of damage to the LCD screen, such as preventing the LCD screen from falling off, thereby improving production efficiency.

[0009] In one embodiment, the mounting bracket further has a plurality of air holes connected to the air suction channel, and the air holes are provided with adapters for connecting to the air suction pipe.

[0010] In one embodiment, the adapter includes a first adapter section and a second adapter section that are vertically connected, the first adapter section is connected to the air hole, and the second adapter section is connected to the air intake pipe.

[0011] In one embodiment, the mounting bracket further has a plurality of spare holes connected to the air suction channel, and the spare holes are provided with detachable plugging heads.

[0012] In one embodiment, the spare hole and the air hole have the same or different directions.

[0013] In one embodiment, the mounting bracket further has a plurality of mounting holes, and the mounting holes are separated from the air suction channel.

[0014] In one embodiment, the number of the vacuum suction cups is two, and the two vacuum suction cups are respectively arranged at both ends of the mounting bracket in the length direction.

[0015] In one embodiment, the distance between the two vacuum suction cups in the length direction of the mounting bracket is 310 mm to 330 mm.

[0016] In one embodiment, the vacuum suction cup includes a connected vacuum suction nozzle and a vacuum adsorption adapter, and the vacuum adsorption adapter is connected to the suction channel.

[0017] A dispensing device, comprising a machine platform, a running track and a suction cup bracket as described in any one of the above items;

[0018] The running track is arranged above the machine platform and can move up and down or left and right. The mounting bracket of the suction cup bracket is connected to the running track, and the vacuum suction cup of the suction cup bracket faces the table top of the machine platform.

[0019] The above-mentioned dispensing device, by installing the mounting bracket of the suction cup bracket on the running track of the dispensing device, can use the running track to drive the vacuum suction cup to move up and down and left and right, so that the LCD screen can be transferred from the transmission combing mechanism of the dispensing device to the material tray transfer mechanism. The entire transfer process does not require manual intervention, which can reduce the labor intensity of the operator and the chance of damage to the LCD screen, such as preventing the LCD screen from falling off, thereby improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A perspective view of a suction cup bracket of a dispensing device provided in one embodiment of the present application.

[0021] Figure 2 for Figure 1 Side view of the provided suction cup mount.

[0022] Figure 3 This is a simplified structural diagram of a dispensing device provided in one embodiment of the present application.

[0023] The reference numerals in the accompanying drawings are described as follows:

[0024] 10. Suction cup bracket; 100. Mounting bracket; 100a. Suction channel; 100b. Air hole; 100c. Spare hole; 100d. Mounting hole; 200. Vacuum suction cup; 210. Vacuum nozzle; 220. Vacuum adsorption adapter; 20. Machine platform; 30. Running track; 40. Transmission combing mechanism; 50. Tray transfer mechanism. DETAILED DESCRIPTION

[0025] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0026] In the description of this application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0027] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of this application, if the term "plurality" appears, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0028] In this application, unless otherwise specified or limited, the terms "mounted," "connected," "connected," "fixed," etc., should be interpreted broadly. For example, these terms may refer to fixed connections, removable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediary; and internal communication between two components or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0029] In this application, unless otherwise expressly specified or limited, if a first feature is described as being "above" or "below" a second feature, or similar descriptions, this may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is described as being "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is described as being "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0030] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only embodiment.

[0031] Liquid crystal displays (LCDs) are a type of display used for televisions and computers. They are increasingly popular among consumers due to their low power consumption, compact size, and low radiation. During both production and subsequent LCD repair, adhesive dispensing is required on the back panel of the LCD to provide adhesion, potting, insulation, and securement.

[0032] However, before dispensing glue on the LCD screen, the operator is required to move the LCD screen from the transmission combing mechanism 40 to the tray transfer mechanism 50, which not only increases the labor intensity of the operator, but also increases the probability of damage to the LCD screen.

[0033] In this regard, Figure 1 and Figure 2 As shown, an embodiment of the present application provides a suction cup bracket 10, which includes a mounting bracket 100 and a plurality of vacuum suction cups 200; the vacuum suction cup 200 has an air suction channel 100a, and the air suction channel 100a is arranged along the length direction of the mounting bracket 100; the vacuum suction cup 200 is arranged along the length direction of the mounting bracket 100 and is connected to the air suction channel 100a.

[0034] The suction cup bracket 10 can be used in the field of processing liquid crystal display screens. It can play a role in transferring liquid crystal display screens during the processing of liquid crystal display screens. It can transfer liquid crystal display screens from one station to another without manual handling, which can reduce the labor intensity of operators and the probability of damage to liquid crystal display screens. The suction cup bracket 10 can be installed on a dispensing machine, specifically, Figure 3 As shown, the mounting bracket 100 of the suction cup bracket 10 can be mounted on the running track 30 of the dispensing device, and the suction channel 100a of the mounting bracket 100 is connected to the vacuum device. Among them, the mounting bracket 100 can be made of aluminum alloy, which is not only light in weight but also has high strength.

[0035] Among them, Figure 3 As shown, the dispensing device also includes a machine 20, a transmission combing mechanism 40 and a tray transfer mechanism 50. The transmission combing mechanism 40 and the tray transfer mechanism 50 are arranged on the machine 20, and the running track 30 is arranged above the machine 20 and can move up and down or left and right. Before dispensing, the running track 30 first moves to the bottom of the transmission combing mechanism 40 and lowers the suction cup bracket 10 until the vacuum suction cup 200 of the suction cup bracket 10 contacts the display screen on the transmission combing mechanism 40. Then, the vacuum device is used to evacuate the vacuum suction cup 200, thereby sucking the display screen; then, the running track 30 moves upward, and the suction cup bracket 10 takes the display screen away from the transmission combing mechanism 40. Then, the running track 30 moves to the top of the tray transfer mechanism 50 and lowers the suction cup bracket 10 until the display screen contacts the tray transfer mechanism 50; finally, the vacuum device is used to exhaust the vacuum suction cup 200, so that the vacuum suction cup 200 is connected to the outside atmosphere, thereby releasing the display screen onto the tray transfer mechanism 50 and waiting for dispensing. As an example, the dispensing device further includes a drive motor, which is used to drive the running track 30 to move up and down or left and right. The dispensing device also includes a control module, which is connected to the drive motor signal. The control module controls the drive motor to move the running track 30 up and down or left and right, thereby achieving high-precision automated production requirements and improving production efficiency.

[0036] It should be noted that the suction cup bracket 10 can not only be used in the processing field of liquid crystal display screens to transport display screens, cover plates or finished liquid crystal display screens, etc.; it can also be applied to other processing fields to transport other target parts.

[0037] It can be seen that the suction cup bracket 10 is installed on the running track 30 of the dispensing device through the installation bracket 100. The running track 30 can be used to drive the vacuum suction cup 200 to move up and down and left and right, so that the LCD screen can be transferred from the transmission combing mechanism 40 of the dispensing device to the material tray transfer mechanism 50. The entire transfer process does not require manual intervention, which can reduce the labor intensity of the operator and the probability of damage to the LCD screen, such as preventing the LCD screen from falling off, thereby improving production efficiency.

[0038] like Figure 1 As shown, in some embodiments, the mounting bracket 100 further has a plurality of air holes 100b connected to the suction channel 100a, and the air holes 100b are provided with adapters for connecting to the suction pipe. The adapter facilitates the connection between the suction channel 100a of the mounting bracket 100 and the external vacuum device.

[0039] The number of the air holes 100b can be set as needed, as long as it does not affect the air extraction and exhaust of the vacuum suction cup 200. For example, Figure 1 As shown, one air hole 100 b is provided on the mounting bracket 100 . Of course, more air holes 100 b may also be provided.

[0040] In one embodiment, the adapter may include a first adapter section and a second adapter section connected vertically, wherein the first adapter section is connected to the air hole 100b and the second adapter section is connected to the suction pipe. The adapter of this structure is generally L-shaped, which facilitates the connection between the adapter and the vacuum device.

[0041] Continue to see Figure 1 In some embodiments, the mounting bracket 100 further has a plurality of spare holes 100c connected to the suction channel 100a, and the spare holes 100c are provided with detachable plugs. When the suction cup bracket 10 is installed on a different dispensing device or the installation position of the vacuum device is changed, it may be inconvenient to connect the air holes 100b of the mounting bracket 100 to the suction pipe. To this end, the suction pipe can be connected to the spare holes 100c on the suction cup bracket 10. It should be noted that when the suction pipe is connected to the spare holes 100c, the air holes 100b need to be blocked with plugs to prevent air leakage.

[0042] The number of the spare holes 100c can be set according to the requirements, as long as it is convenient for the installation of the suction pipe. For example, it can be set to 1, 2, 3, Figure 2 4 or more shown.

[0043] The directions of the spare hole 100c and the air hole 100b are the same or different. This arrangement can increase the installation position of the suction pipe and facilitate the installation of the suction pipe. The specific directions of the spare hole 100c and the air hole 100b can be set accordingly according to the needs, as long as it does not affect the installation of the suction pipe. As an example, Figure 1 As shown, the air hole 100b faces upward, a portion of the spare holes 100c faces upward, a portion of the spare holes 100c faces downward, and another portion of the spare holes 100c faces sideways.

[0044] like Figure 1 As shown, in some embodiments, the mounting bracket 100 further has a plurality of mounting holes 100d, which are separated from the suction channel 100a. The mounting holes 100d are used to pass threaded members (such as screws, bolts, etc.), which can be used to mount the mounting bracket 100 on the running track 30 of the dispensing device.

[0045] The number and location of the mounting holes 100d can be set as needed, as long as the mounting bracket 100 can be securely mounted on the running track 30 of the dispensing device. Figure 1 As shown, two groups of mounting holes 100d are arranged at intervals along the length direction in the middle of the mounting bracket 100, and each group of mounting holes 100d includes two mounting holes 100d arranged along the width direction of the mounting bracket 100. It should be noted that, Figure 1 The X direction in ⊂ represents the length direction of the mounting bracket 100 , and the Y direction represents the width direction of the mounting bracket 100 .

[0046] like Figure 1 As shown, in some embodiments, two vacuum suction cups 200 are provided, and the two vacuum suction cups 200 are respectively arranged at both ends of the length direction of the mounting bracket 100. This arrangement can reduce the number of vacuum suction cups 200 installed, simplify the structure of the suction cup bracket 10, and can also firmly hold the LCD screen.

[0047] The distance between the two vacuum cups 200 along the length of the mounting bracket 100 is 310 mm to 330 mm, for example, 310 mm, 315 mm, 320 mm, 325 mm, 330 mm, etc. This distance between the two vacuum cups 200 allows for effective suction of LCD screens of varying sizes (e.g., 5 inches to 24 inches).

[0048] See also Figure 2 In some embodiments, the vacuum cup 200 includes a connected vacuum nozzle 210 and a vacuum adapter 220, which is connected to the suction channel 100a. This structure of the vacuum cup 200 can ensure a tight seal, prevent air leakage, and ensure the normal transportation of the LCD screen.

[0049] The vacuum suction adapter 220 may be a large-head screw thread connector. The vacuum suction nozzle 210 may be trumpet-shaped and made of rubber material to avoid damage to the LCD screen.

[0050] On the other hand, Figure 3 As shown, an embodiment of the present application also provides a dispensing device, which includes a machine platform 20, a running track 30 and a suction cup bracket 10 as described in any one of the above items; the running track 30 is arranged above the machine platform 20 and can move up and down or left and right, the mounting bracket 100 of the suction cup bracket 10 is connected to the running track 30, and the vacuum suction cup 200 of the suction cup bracket 10 faces the table top of the machine platform 20.

[0051] As an example, Figure 3 As shown, the dispensing device also includes a machine 20, a transmission combing mechanism 40 and a tray transfer mechanism 50. The transmission combing mechanism 40 and the tray transfer mechanism 50 are arranged on the machine 20, and the running track 30 is arranged above the machine 20 and can move up and down or left and right. Before dispensing, the running track 30 first moves to the bottom of the transmission combing mechanism 40 and lowers the suction cup bracket 10 until the vacuum suction cup 200 of the suction cup bracket 10 contacts the display screen on the transmission combing mechanism 40. Then, the vacuum device is used to evacuate the vacuum suction cup 200, thereby sucking the display screen; then, the running track 30 moves upward, and the suction cup bracket 10 takes the display screen away from the transmission combing mechanism 40. Then, the running track 30 moves to the top of the tray transfer mechanism 50 and lowers the suction cup bracket 10 until the display screen contacts the tray transfer mechanism 50; finally, the vacuum device is used to exhaust the vacuum suction cup 200, so that the vacuum suction cup 200 is connected to the outside atmosphere, thereby releasing the display screen onto the tray transfer mechanism 50 and waiting for dispensing.

[0052] As an example, the dispensing device further includes a drive motor, which is used to drive the running track 30 to move up and down or left and right. The dispensing device also includes a control module, which is connected to the drive motor signal. The control module controls the drive motor to move the running track 30 up and down or left and right, thereby achieving high-precision automated production requirements and improving production efficiency.

[0053] The dispensing device installs the mounting bracket 100 of the suction cup bracket 10 on the running track 30 of the dispensing device, and can use the running track 30 to drive the vacuum suction cup 200 to move up and down and left and right, so that the LCD screen can be transferred from the transmission combing mechanism 40 of the dispensing device to the material tray transfer mechanism 50. The entire transfer process does not require manual intervention, which can reduce the labor intensity of the operator and the probability of damage to the LCD screen, such as preventing the LCD screen from falling off, thereby improving production efficiency.

[0054] like Figure 1 As shown, in some embodiments, the mounting bracket 100 further has a plurality of air holes 100b connected to the suction channel 100a, and the air holes 100b are provided with adapters for connecting to the suction pipe. The adapter facilitates the connection between the suction channel 100a of the mounting bracket 100 and the external vacuum device.

[0055] The number of the air holes 100b can be set as needed, as long as it does not affect the air extraction and exhaust of the vacuum suction cup 200. For example, Figure 1 As shown, one air hole 100 b is provided on the mounting bracket 100 . Of course, more air holes 100 b may also be provided.

[0056] In one embodiment, the adapter may include a first adapter section and a second adapter section connected vertically, wherein the first adapter section is connected to the air hole 100b and the second adapter section is connected to the suction pipe. The adapter of this structure is generally L-shaped, which facilitates the connection between the adapter and the vacuum device.

[0057] Continue to see Figure 1 In some embodiments, the mounting bracket 100 further has a plurality of spare holes 100c connected to the suction channel 100a, and the spare holes 100c are provided with detachable plugs. When the suction cup bracket 10 is installed on a different dispensing device or the installation position of the vacuum device is changed, it may be inconvenient to connect the air holes 100b of the mounting bracket 100 to the suction pipe. To this end, the suction pipe can be connected to the spare holes 100c on the suction cup bracket 10. It should be noted that when the suction pipe is connected to the spare holes 100c, the air holes 100b need to be blocked with plugs to prevent air leakage.

[0058] The number of the spare holes 100c can be set according to the requirements, as long as it is convenient for the installation of the suction pipe. For example, it can be set to 1, 2, 3, Figure 2 4 or more shown.

[0059] The directions of the spare hole 100c and the air hole 100b are the same or different. This arrangement can increase the installation position of the suction pipe and facilitate the installation of the suction pipe. The specific directions of the spare hole 100c and the air hole 100b can be set accordingly according to the needs, as long as it does not affect the installation of the suction pipe. As an example, Figure 1 As shown, the air hole 100b faces upward, a portion of the spare holes 100c faces upward, a portion of the spare holes 100c faces downward, and another portion of the spare holes 100c faces sideways.

[0060] like Figure 1As shown, in some embodiments, the mounting bracket 100 further has a plurality of mounting holes 100d, which are separated from the suction channel 100a. The mounting holes 100d are used to pass threaded members (such as screws, bolts, etc.), which can be used to mount the mounting bracket 100 on the running track 30 of the dispensing device.

[0061] The number and location of the mounting holes 100d can be set as needed, as long as the mounting bracket 100 can be securely mounted on the running track 30 of the dispensing device. Figure 1 As shown, two groups of mounting holes 100d are arranged at intervals along the length direction in the middle of the mounting bracket 100, and each group of mounting holes 100d includes two mounting holes 100d arranged along the width direction of the mounting bracket 100. It should be noted that, Figure 1 The X direction in ⊂ represents the length direction of the mounting bracket 100 , and the Y direction represents the width direction of the mounting bracket 100 .

[0062] like Figure 1 As shown, in some embodiments, two vacuum suction cups 200 are provided, and the two vacuum suction cups 200 are respectively arranged at both ends of the length direction of the mounting bracket 100. This arrangement can reduce the number of vacuum suction cups 200 installed, simplify the structure of the suction cup bracket 10, and can also firmly hold the LCD screen.

[0063] The distance between the two vacuum cups 200 along the length of the mounting bracket 100 is 310 mm to 330 mm, for example, 310 mm, 315 mm, 320 mm, 325 mm, 330 mm, etc. This distance between the two vacuum cups 200 allows for effective suction of LCD screens of varying sizes (e.g., 5 inches to 24 inches).

[0064] See also Figure 2 In some embodiments, the vacuum cup 200 includes a connected vacuum nozzle 210 and a vacuum adapter 220, which is connected to the suction channel 100a. This structure of the vacuum cup 200 can ensure a tight seal, prevent air leakage, and ensure the normal transportation of the LCD screen.

[0065] The vacuum suction adapter 220 may be a large-head screw thread connector. The vacuum suction nozzle 210 may be trumpet-shaped and made of rubber material to avoid damage to the LCD screen.

[0066] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0067] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A suction cup bracket for a dispensing device, characterized in that: include: A mounting bracket is mounted on the running track of the dispensing device and has an air suction channel, wherein the air suction channel is arranged along the length direction of the mounting bracket; as well as A plurality of vacuum suction cups are arranged along the length direction of the mounting bracket and are communicated with the suction channel.

2. The suction cup bracket according to claim 1, characterized in that: The mounting bracket further has a plurality of air holes communicated with the air suction channel, and the air holes are provided with adapters for communicating with the air suction pipe.

3. The suction cup bracket according to claim 2, characterized in that: The adapter includes a first adapter section and a second adapter section that are vertically connected. The first adapter section is communicated with the air hole, and the second adapter section is communicated with the air intake pipe.

4. The suction cup bracket according to claim 2, characterized in that: The mounting bracket further has a plurality of spare holes communicated with the air suction channel, and the spare holes are provided with detachable plugging heads.

5. The suction cup bracket according to claim 4, characterized in that: The spare hole and the air hole have the same or different directions.

6. The suction cup bracket according to any one of claims 1 to 5, characterized in that: The mounting bracket further has a plurality of mounting holes, and the mounting holes are separated from the air suction channel.

7. The suction cup bracket according to any one of claims 1 to 5, characterized in that: There are two vacuum suction cups, which are respectively arranged at two ends of the mounting bracket in the length direction.

8. The suction cup bracket according to claim 7, characterized in that: The distance between the two vacuum suction cups in the length direction of the mounting bracket is 310 mm to 330 mm.

9. The suction cup bracket according to any one of claims 1 to 5, characterized in that: The vacuum suction cup includes a connected vacuum suction nozzle and a vacuum adsorption adapter, and the vacuum adsorption adapter is communicated with the suction channel.

10. A dispensing device, characterized in that: It comprises a machine platform, a running track and a suction cup bracket according to any one of claims 1 to 9; The running track is arranged above the machine platform and can move up and down or left and right. The mounting bracket of the suction cup bracket is connected to the running track, and the vacuum suction cup of the suction cup bracket faces the table top of the machine platform.

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