Special clamp for HTRB test

Abstract

The invention relates to the technical field of clamps, in particular to a special clamp for HTRB test, which comprises a mounting seat independently and fixedly arranged, and a positioning disc mounted on the mounting seat; the two supporting mechanisms are symmetrically arranged at the two ends of the mounting base; two moving parts are arranged on each supporting mechanism, through holes are formed in the moving parts, and the diameter axes of the through holes are perpendicular to the moving tracks of the moving parts; the transmission part is rotationally arranged in the through hole of the moving part, the transmission part is installed in a sliding mode along the axis of the through hole, and a flow guide groove is formed in the transmission part; the positioning piece is arranged in the through hole of the moving piece, and the positioning piece is arranged in the flow guide groove of the transmission piece in a sliding manner; the adjusting mechanism is arranged on the moving part, a clamping part is arranged on the adjusting mechanism, and the adjusting mechanism is used for adjusting the mounting height of the clamping part and the moving part; the driving mechanism is arranged on the mounting seat, and the four groups of transmission parts are connected with the driving mechanism; test efficiency is improved, and adaptability of test parts is improved.

Description

Technical Field

[0001] The invention relates to the technical field of fixtures, and in particular to a special fixture for HTRB testing. Background Art

[0002] In the field of electronic component reliability testing, high temperature reverse bias HTRB testing is one of the key tests for evaluating the long-term stability and reliability of semiconductor devices. In order to ensure the accuracy and repeatability of the test results, a specially designed fixture is required to fix the component under test and ensure that it maintains good electrical connection and thermal stability during the test.

[0003] Existing fixtures can usually only adapt to test parts of specific sizes and shapes. Different fixtures need to be replaced for parts of different specifications, which increases the complexity and cost of operation. At the same time, during the test process, the clamping and releasing actions of the fixture are slow, affecting the overall efficiency of the test. This problem is particularly prominent when test parts need to be replaced frequently. Summary of the invention

[0004] The main purpose of the present invention is to provide a special fixture for HTRB testing, so as to effectively solve the problems pointed out in the background technology.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is:

[0006] A special fixture for HTRB testing, comprising:

[0007] The mounting seat is independently fixed and the positioning plate is installed on the mounting seat;

[0008] Two supporting mechanisms are symmetrically arranged at both ends of the mounting base;

[0009] Moving parts, each supporting mechanism is provided with two moving parts, the moving parts are provided with through holes, and the diameter axis of the through holes is arranged perpendicular to the moving track of the moving parts;

[0010] A transmission member is rotatably arranged inside the through hole of the moving member, and the transmission member is slidably installed along the axis of the through hole. A guide groove is arranged on the transmission member, and the guide groove consists of a spiral groove and two straight grooves, and the two straight grooves are located at both side ends of the spiral groove, and the straight groove is arranged parallel to the axis;

[0011] A positioning member is arranged inside the through hole of the moving member, and the positioning member is slidably arranged in the guide groove of the transmission member;

[0012] An adjusting mechanism is arranged on the moving part, a clamping part is arranged on the adjusting mechanism, and the adjusting mechanism is used to adjust the installation height of the clamping part and the moving part;

[0013] The driving mechanism is arranged on the mounting seat, and the four sets of transmission parts are all connected to the driving mechanism, and the driving mechanism is used to adjust the working height of the clamping part.

[0014] Furthermore, the supporting mechanism comprises:

[0015] Two transmission shafts are rotatably arranged in the shaft holes at both ends of the mounting seat, and both ends of the transmission shafts are provided with external threads with opposite screw directions;

[0016] Two support beams are respectively arranged at both ends of the two transmission shafts, and the threaded holes of the support beams are matched and connected with the external threads of the transmission shafts, and two groups of moving parts are slidably arranged on the support beams;

[0017] The bolt is arranged in the threaded inner hole of the moving part, the bolt passes through the long slot hole of the support beam, and the moving part and the support beam are fixedly connected by the bolt.

[0018] Furthermore, both support beams are slidably connected to the mounting seat.

[0019] Furthermore, the regulating mechanism comprises:

[0020] A positioning column is arranged on the clamping member, and the positioning column and the positioning hole of the transmission member are slidably arranged;

[0021] The threaded rod is arranged in the threaded inner cavity of the positioning column, and the threaded rod is rotatably arranged on the transmission member.

[0022] Furthermore, an adjusting cap is arranged on the threaded rod.

[0023] Furthermore, the driving mechanism comprises:

[0024] Two threaded columns are both arranged on the mounting seat, and the rotation axes of the two threaded columns are arranged perpendicular to the moving track of the moving part;

[0025] The conductive member, the two threaded columns are arranged in the threaded through grooves of the conductive member, and four groups of mounting columns are arranged at equal intervals on the conductive member;

[0026] Four connecting mechanisms are connected to the four mounting posts respectively, and the connecting mechanisms are connected to the transmission members on the corresponding sides;

[0027] The power mechanism is arranged on the mounting seat and is used for providing synchronous rotation power to the two groups of threaded columns.

[0028] Furthermore, the connecting mechanism comprises:

[0029] The swing arm is rotatably mounted on the mounting column, and the rotation axis is parallel to the axis of the transmission member;

[0030] The extension arm is slidably arranged on the swing arm, and the transmission member is rotatably arranged inside the assembly hole of the extension arm.

[0031] Furthermore, the power mechanism comprises:

[0032] A servo motor is disposed on the mounting base to provide synchronous rotation power to the two threaded columns;

[0033] A power shaft is arranged at the output end of the servo motor;

[0034] A driving gear is coaxially arranged on the power shaft;

[0035] The two driven gears are coaxially arranged on the two threaded columns respectively, and the driving gear is connected with the two driven gears.

[0036] Furthermore, a protection box is arranged on the mounting seat, and the driving gear and the two driven gears are arranged inside the protection box.

[0037] Furthermore, a protection pad is provided on the clamping member.

[0038] After adopting the above technical scheme, the beneficial effects of the present invention are as follows: the positioning part and the guide groove design (composed of a spiral groove and two straight grooves) ensure that the clamping part can reach the predetermined position accurately and correctly, thereby improving the clamping accuracy of the parts during the test process. The adjustment mechanism is used to adjust the installation height of the clamping part and the moving part, so that the fixture can adapt to test parts of different sizes and shapes, thereby enhancing the versatility and flexibility of the equipment. The integrated design of the drive mechanism allows four transmission parts to be controlled simultaneously, and the adjustment steps simplify the operation process and improve work efficiency. The special guide groove structure, that is, the design of a spiral groove combined with a straight groove, is adopted to prevent interference of the clamping part when taking and placing the test parts, thereby improving the test efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0040] Figure 1 It is a front view structural schematic diagram of the present invention;

[0041] Figure 2 It is a schematic diagram of the shaft side structure of the present invention;

[0042] Figure 3 It is a schematic diagram of the connection mechanism structure of the present invention;

[0043] Figure 4 It is a schematic diagram of the power mechanism structure of the present invention;

[0044] Figure 5It is a schematic diagram of the parts structure of the present invention;

[0045] Figure 6 It is a schematic diagram of a local explosion structure of the present invention;

[0046] Markings in the accompanying drawings: 1. mounting base; 2. supporting mechanism; 21. transmission shaft; 22. supporting beam; 23. bolt; 3. moving part; 4. transmission part; 5. positioning part; 6. adjusting mechanism; 61. positioning column; 62. threaded rod; 63. adjusting cap; 7. clamping part; 71. protective pad; 8. driving mechanism; 81. threaded column; 82. conducting part; 83. connecting mechanism; 83a. swing arm; 83b. extension arm; 84. power mechanism; 84a. servo motor; 84b. power shaft; 84c. driving gear; 84d. driven gear; 84e. protective box; 85. mounting column. DETAILED DESCRIPTION

[0047] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0048] The present invention is a special fixture for HTRB testing, and the installation method, connection method or setting method of all the above components are common mechanical methods, and the specific structures, models and coefficient indicators of all its components are its own technology. As long as it can achieve its beneficial effects, it can be implemented, so it will not be elaborated.

[0049] In the present invention, for a special fixture for HTRB testing, unless otherwise specified, the directional words contained in the terms such as “up, down, left, right, front, back, inside, outside, vertical, horizontal” only represent the directions of the terms in normal use, or are common names understood by those skilled in the art, and should not be regarded as limitations on the terms. At the same time, the number series nouns such as “first”, “second” and “third” do not represent specific quantities and orders, but are merely used to distinguish the names. Moreover, the terms “include”, “comprising” or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0050] like Figures 1 to 6 As shown, a special fixture for HTRB testing includes:

[0051] The mounting seat 1 is independently fixed and made of high-strength aluminum alloy material, and has sufficient mechanical strength to ensure stable operation of the equipment. The positioning plate is installed on the mounting seat 1 for accurately mounting and positioning the test part;

[0052] Two supporting mechanisms 2 are symmetrically arranged at two ends of the mounting base 1;

[0053] Moving parts 3, two moving parts 3 are arranged on each supporting mechanism 2, and through holes are arranged on the moving parts 3, and the diameter axis of the through holes is arranged perpendicular to the moving track of the moving parts 3;

[0054] The transmission member 4 is a cylindrical rod, which is rotatably arranged inside the through hole of the moving member 3, and the transmission member 4 is slidably installed along the axis of the through hole. The transmission member 4 is provided with a guide groove, which is composed of a spiral groove and two straight grooves, and the two straight grooves are located at both side ends of the spiral groove, and the straight groove is arranged parallel to the axis;

[0055] The positioning member 5 is arranged inside the through hole of the moving member 3, and the positioning member 5 is slidably arranged in the guide groove of the transmission member 4. As the transmission member 4 moves up and down, the positioning member 5 will roll in the guide groove to control the linear lifting, moving and rotating of the transmission member 4;

[0056] An adjusting mechanism 6 is arranged on the moving member 3, and a clamping member 7 is arranged on the adjusting mechanism 6. The adjusting mechanism 6 is used to adjust the installation height of the clamping member 7 and the moving member 3;

[0057] The driving mechanism 8 is arranged on the mounting seat 1, and the four sets of transmission members 4 are connected to the driving mechanism 8, and the driving mechanism 8 is used to adjust the working height of the clamping member 7;

[0058] The transmission member 4 has three movement modes when working, including the first linear motion, the rotational motion and the second linear motion. When the driving mechanism 8 is started, the lifting power is transmitted to the transmission member 4, and the transmission member 4 is lifted and adjusted to clamp the test part. The specific working process and principle are as follows:

[0059] First linear motion, when the driving mechanism 8 provides downward force to the transmission member 4, the positioning member 5 is located inside the first straight groove, and the transmission member 4 performs linear motion under the action of the positioning member 5;

[0060] Rotational motion: when the positioning member 5 and the first straight groove slide into the spiral groove, the transmission member 4 cooperates with the rotating groove through the positioning member 5 to drive the transmission member 4 to rotate. At this time, the transmission member 4 drives the clamping member 7 to rotate to the top of the part;

[0061] The second linear motion, when the positioning member 5 slides from the spiral groove to the second straight groove, the transmission member drives the clamping member 7 to descend linearly to clamp the part through the cooperation between the positioning member 5 and the second straight groove;

[0062] The use of a positioning member 5 and a guide groove design (composed of a spiral groove and two straight grooves) ensures that the clamping member 7 can reach the predetermined position accurately, thereby improving the clamping accuracy of parts during the test process. The adjustment mechanism 6 is used to adjust the installation height of the clamping member 7 and the movable member 3, so that the fixture can adapt to test parts of different sizes and shapes, thereby enhancing the versatility and flexibility of the equipment. The integrated design of the drive mechanism 8 allows the simultaneous control of four transmission members 4, the adjustment steps, simplifies the operation process, and improves work efficiency. A special guide groove structure, i.e., a spiral groove combined with a straight groove design, is adopted to prevent interference of the clamping member 7 when taking and placing test parts, thereby improving test efficiency.

[0063] As a preferred embodiment of the above, the supporting mechanism 2 includes:

[0064] Two transmission shafts 21 are rotatably disposed in the shaft holes at both ends of the mounting seat 1, respectively. External threads with opposite screw directions are disposed at both ends of the transmission shafts 21, and the rotation axes of the two sets of transmission shafts 21 are disposed perpendicularly to the moving track of the moving member 3;

[0065] Two support beams 22 are respectively disposed at both ends of the two transmission shafts 21, and the threaded holes of the support beams 22 are matched and connected with the external threads of the transmission shafts 21, and the two groups of moving parts 3 are slidably disposed on the support beams 22;

[0066] The bolt 23 is disposed in the threaded inner hole of the moving member 3, the bolt 23 passes through the long slot hole of the support beam 22, and the moving member 3 and the support beam 22 are fixedly connected by the bolt 23;

[0067] Both support beams 22 are slidably connected to the mounting seat 1;

[0068] The working principle of the supporting mechanism 2 of the present device is as follows:

[0069] When the support mechanism 2 needs to be adjusted to adapt to a specific test part, the transmission shaft 21 is first rotated by an external power device. Since the external threads at both ends of the transmission shaft 21 are in opposite directions, when the transmission shaft 21 rotates, the two support beams 22 will move in opposite directions, thereby driving the moving part 3 and the clamping part 7 thereon to move synchronously. This process can achieve precise positioning of the test part in the width direction;

[0070] At the same time, the bolts 23 on the moving part 3 can slide freely in the long slots of the support beam 22, allowing the moving part 3 to move laterally within a certain range to fine-tune the position of the clamping part 7 and achieve precise positioning of the test part in the length direction. After the position adjustment is completed, the moving part 3 is locked in the appropriate position by tightening the bolts 23;

[0071] Through the above design, the support mechanism 2 not only provides a stable support foundation, but also has flexible adjustment capabilities, which greatly improves the adaptability and operational convenience of the HTRB test fixture for test parts of different specifications.

[0072] As a preferred embodiment of the above, the adjustment mechanism 6 includes:

[0073] The positioning column 61 is arranged on the clamping member 7, the outer diameter of the positioning column 61 matches the positioning hole on the transmission member 4, and the positioning column 61 is slidably arranged with the positioning hole of the transmission member 4;

[0074] The threaded rod 62 is disposed in the threaded inner cavity of the positioning column 61, and the threaded rod 62 is rotatably connected to the transmission member 4 through a bearing, allowing the threaded rod 62 to rotate freely inside the transmission member 4;

[0075] An adjustment cap 63 is provided on the threaded rod 62;

[0076] The working principle of the regulating mechanism 6 of the present device is as follows:

[0077] When it is necessary to adjust the height of the clamping member 7, the operator holds the handle of the adjusting cap 63 with his hand and rotates the adjusting cap 63 clockwise or counterclockwise. The rotation of the adjusting cap 63 will drive the threaded rod 62 to rotate. Since the threaded rod 62 matches the threaded inner cavity of the positioning column 61, the rotation of the threaded rod 62 will be converted into a linear motion of the positioning column 61. The positioning column 61 moves up and down along the positioning hole of the transmission member 4, thereby driving the clamping member 7 to move up and down to achieve height adjustment.

[0078] As a preferred embodiment of the above, the driving mechanism 8 includes:

[0079] Two threaded columns 81 are both disposed on the mounting seat 1, and the rotation axes of the two threaded columns 81 are disposed perpendicularly to the moving track of the moving member 3;

[0080] The conductive member 82, two threaded columns 81 are arranged in the threaded through grooves of the conductive member 82, and four groups of mounting columns 85 are arranged at equal intervals on the conductive member 82;

[0081] Four connecting mechanisms 83 are connected to four mounting posts 85 respectively, and the connecting mechanisms 83 are connected to the transmission members 4 on the corresponding sides;

[0082] A power mechanism 84 is disposed on the mounting base 1, and is used to provide synchronous rotation power to the two sets of threaded columns 81;

[0083] The working principle of the driving mechanism 8 of this device is as follows:

[0084] When the height of the clamping member 7 needs to be adjusted, the power mechanism 84 is started and synchronously drives the two threaded columns 81 to rotate. Since the external threads of the threaded columns 81 match the threaded through grooves of the conductive member 82, the rotation of the threaded columns 81 will be converted into linear motion of the conductive member 82. The movement of the conductive member 82 is transmitted to the four transmission members 4 through the connecting mechanism 83, so that the four transmission members 4 are raised and lowered synchronously. The lifting and lowering of the transmission members 4 will drive the clamping member 7 to move up and down, thereby realizing the height adjustment of the clamping member 7.

[0085] As a preferred embodiment of the above, the connecting mechanism 83 includes:

[0086] The swing arm 83a is rotatably mounted on the mounting column 85, and the rotation axis is parallel to the axis of the transmission member 4;

[0087] The extension arm 83b is slidably disposed on the swing arm 83a, and the transmission member 4 is rotatably disposed inside the assembly hole of the extension arm 83b;

[0088] During use, the design of the swing arm 83a and the extension arm 83b ensures the synchronous lifting and lowering of the four transmission parts 4, thereby improving the height adjustment accuracy and consistency of the clamping part 7. The swing design of the swing arm 83a and the sliding design of the extension arm 83b enable the connecting mechanism 83 to adapt to the movement of the transmission part 4 at different positions, thereby ensuring the stability and accuracy of the transmission part 4. The design of the power mechanism 84 simplifies the operating process. The operator only needs to start the power mechanism 84 and input the required height value to achieve automatic adjustment.

[0089] As a preferred embodiment of the above, the power mechanism 84 includes:

[0090] The servo motor 84a is disposed on the mounting base 1 and provides synchronous rotation power to the two threaded columns 81;

[0091] The power shaft 84b is arranged at the output end of the servo motor 84a;

[0092] A driving gear 84c is coaxially disposed on the power shaft 84b;

[0093] Two driven gears 84d are coaxially disposed on the two threaded columns 81, respectively, and the driving gear 84c is connected to the two driven gears 84d;

[0094] A protection box 84e is provided on the mounting base 1, and a driving gear 84c and two driven gears 84d are all provided inside the protection box 84e;

[0095] The working principle of the power mechanism 84 of this device is as follows:

[0096] When the height of the clamping member 7 needs to be adjusted, the operator starts the servo motor 84a, and transmits the rotational power to the driving gear 84c through the power shaft 84b. The rotation of the driving gear 84c is transmitted to the two driven gears 84d through the meshing relationship, so that the two driven gears 84d rotate synchronously. The rotation of the two driven gears 84d drives the two threaded columns 81 to rotate synchronously. Since the external thread of the threaded column 81 matches the threaded through groove of the transmission member 82, the rotation of the threaded column 81 will be converted into a linear motion of the transmission member 82. The movement of the transmission member 82 is transmitted to the four transmission members 4 through the connecting mechanism 83, so that the four transmission members 4 are lifted and lowered synchronously. The lifting and lowering of the transmission member 4 will drive the clamping member 7 to move up and down, thereby realizing the height adjustment of the clamping member 7.

[0097] The design of the protection box 84e effectively prevents dust and debris from entering the gear transmission system, prolongs the service life of the gears, and improves the reliability and stability of the system.

[0098] As a preferred embodiment of the above embodiment, a protective pad 71 is provided on the clamping member 7, and the protective pad 71 can be made of soft materials, such as rubber, silicone, polyurethane, etc.;

[0099] During use, the protection pad 71 has good buffering performance and can disperse the clamping force to prevent deformation or damage of the test part caused by excessive local pressure.

[0100] The above are only preferred embodiments of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A special fixture for HTRB testing, characterized in that: include: A mounting seat (1) is independently fixedly arranged, and a positioning plate is mounted on the mounting seat (1); Two supporting mechanisms (2) are symmetrically arranged at two ends of the mounting seat (1); A moving member (3), each of the supporting mechanisms (2) being provided with two of the moving members (3), the moving member (3) being provided with a through hole, and the diameter axis of the through hole being arranged perpendicular to the moving track of the moving member (3); A transmission member (4) is rotatably arranged inside the through hole of the moving member (3), and the transmission member (4) is slidably installed along the axis of the through hole. The transmission member (4) is provided with a guide groove, which is composed of a spiral groove and two straight grooves, and the two straight grooves are located at the two side ends of the spiral groove, and the straight grooves are arranged parallel to the axis. A positioning member (5) is arranged inside the through hole of the moving member (3), and the positioning member (5) is slidably arranged in the guide groove of the transmission member (4); An adjusting mechanism (6) is arranged on the moving member (3), a clamping member (7) is arranged on the adjusting mechanism (6), and the adjusting mechanism (6) is used to adjust the installation height of the clamping member (7) and the moving member (3); A driving mechanism (8) is arranged on the mounting seat (1), and the four groups of transmission members (4) are all connected to the driving mechanism (8). The driving mechanism (8) is used to adjust the working height of the clamping member (7).

2. The HTRB test fixture as claimed in claim 1, characterized in that: The supporting mechanism (2) comprises: Two transmission shafts (21) are rotatably disposed in the shaft holes at two ends of the mounting seat (1), and the two ends of the transmission shaft (21) are provided with external threads with opposite thread directions; Two support beams (22) are respectively arranged at both ends of the two transmission shafts (21), and the threaded holes of the support beams (22) are matched and connected with the external threads of the transmission shafts (21), and the support beams (22) are slidably arranged on the two groups of moving parts (3); A bolt (23) is arranged in the threaded inner hole of the moving member (3); the bolt (23) passes through the long slot hole of the support beam (22); and the moving member (3) and the support beam (22) are fixedly connected via the bolt (23).

3. The HTRB test fixture as claimed in claim 2, characterized in that: The two support beams (22) are both slidably connected to the mounting seat (1).

4. The HTRB test fixture as claimed in claim 1, characterized in that: The regulating mechanism (6) comprises: A positioning column (61) is arranged on the clamping member (7), and the positioning column (61) is slidably arranged with the positioning hole of the transmission member (4); A threaded rod (62) is disposed in the threaded inner cavity of the positioning column (61), and the threaded rod (62) is rotatably disposed on the transmission member (4).

5. The HTRB test fixture as claimed in claim 4, characterized in that: An adjusting cap (63) is provided on the threaded rod (62).

6. The HTRB test fixture as claimed in claim 4, characterized in that: The driving mechanism (8) comprises: Two threaded columns (81) are both arranged on the mounting seat (1), and the rotation axes of the two threaded columns (81) are arranged perpendicular to the moving track of the moving member (3); A conductive member (82), wherein the two threaded columns (81) are both arranged in threaded grooves of the conductive member (82), and four groups of mounting columns (85) are equidistantly arranged on the conductive member (82); Four connecting mechanisms (83) are respectively connected to the four mounting posts (85), and the connecting mechanisms (83) are connected to the transmission members (4) on the corresponding sides; A power mechanism (84) is arranged on the mounting seat (1), and the power mechanism (84) is used to provide synchronous rotation power to the two groups of threaded columns (81).

7. The HTRB test fixture as claimed in claim 6, characterized in that: The connecting mechanism (83) comprises: A swing arm (83a) is rotatably mounted on the mounting column (85), and its rotation axis is parallel to the axis of the transmission member (4); The extension arm (83b) is slidably arranged on the swing arm (83a), and the transmission member (4) is rotatably arranged inside the assembly hole of the extension arm (83b).

8. The HTRB test fixture as claimed in claim 6, characterized in that: The power mechanism (84) comprises: A servo motor (84a) is arranged on the mounting seat (1) and provides synchronous rotation power to the two threaded columns (81); A power shaft (84b), arranged at the output end of the servo motor (84a); A driving gear (84c), coaxially arranged on the power shaft (84b); The two driven gears (84d) are coaxially arranged on the two threaded columns (81), and the driving gear (84c) is connected to the two driven gears (84d).

9. The HTRB test fixture as claimed in claim 8, characterized in that: The protective box (84e) is arranged on the mounting seat (1), and the driving gear (84c) and the two driven gears (84d) are arranged inside the protective box (84e).

10. The HTRB test fixture as claimed in claim 1, characterized in that: A protection pad (71) is provided on the clamping member (7).

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