in figure 1 Among them, the temporary suspension element 10 includes a linear guiding device 1, a horizontal pin 2 and a hook 3.
 The linear guide device 1 includes a threaded end 1a and a cavity 1c, and the cavity 1c is at a distance from the thread of the end 1a. From Figure 2b It can be seen that the shape of the cavity 1c can be a slot within the width of the guiding device 1. D1 represents the longitudinal direction of the linear guide device 1. The outer surface S of the guiding device 1 is smooth and parallel to the direction D1 so as to form a sliding surface except for the threaded end 1a and the cavity 1c. The guiding device 1 can be made of a cylindrical rod, such as a metal rod.
 Optionally, the linear guide device 1 can have a clamping end 1b, which is opposite to the end 1a in the direction D1, and the length of the end 1b from the horizontal pin 2 is greater than 50 mm (millimeters). The clamping end 1b can be round or conical to facilitate its introduction into the hole of the outer structure.
 As an example, the length of the guide device 1 in the direction D1 can be 110mm, its diameter can be 8mm, and the thread length can extend 15mm from the end 1a. When measured from the end 1a in the direction D1, the size of the cavity 1c can be from Extend from 25mm to 55mm. The depth of the cavity 1c perpendicular to the direction D1 can be 7 mm. Under such conditions, the length of the clamping end 1b from the cavity 1c along the direction D1 can be 55 mm. In addition, the cavity 1c has an opening on the side perpendicular to the direction D1 and is closed on the opposite side, so that the guiding device 1 constitutes the cavity bottom 1d.
 The cross pin 2 passes through the cavity 1c perpendicular to the direction D1 while being held on each side of the cavity 1c by the guide device 1. figure 1 with Figure 2b The hole 1e made in the guide device 1 for receiving the pin 2 is shown. The diameter of the pin 2 can be 2.0 mm. Preferably, the length of the pin 2 is adjusted so that its end passes through the opening of the hole 1e and does not exceed the outer surface S of the guide device 1.
 Hook 3 ( figure 1 with image 3 ) Can be flat, for example, with a thickness of 2.0 mm. It has a hole 3a for assembling it so as to rotate around the cross pin 2 in the cavity 1c. The diameter of the hole 3a and the width of the cavity 1c are selected so that the hook 3 swings freely around the pin 2. For example, the width of the cavity 1c can be 2.5 mm, and the diameter of the hole 3a can be 2.1 mm. D2 represents the longitudinal direction of the hook 3.
 The size of the hook 3 should be such that it can swing between the guiding position and the holding position, where it is received in the cavity 1c, and at the holding position it partially protrudes from the cavity 1c. in Figure 2a In the figure, the hook 3 is represented by a solid line in the holding position and a broken line is represented in the guiding position. In the guiding position, the directions D1 and D2 can be parallel. In the holding position, the end 3b of the hook 3 is opposite to the pin 2 and is closer to the end 1a of the guide device 1, which is referred to as the distal end, and the end 3b of the hook 3 protrudes to the outer surface S of the guide device 1. outer. Preferably, the end 3b does not protrude above the outer surface S of the guiding position, so as not to prevent the outer structure from sliding on the outer surface.
 The hook 3 can have a root 3c opposite to the distal end 3b of the pin 2 in the direction D2. The shape and size of the root 3c are selected so that the root rests on the bottom 1d of the cavity 1c in the holding position. For example, the angle between the two directions D1 and D2 in the holding position can be 15°, which is relative to the root 3c ( image 3 ) Has the same angle. The length of the hook 3 from its hole 3a to the distal end 3b can be 19mm, its total length in the direction D2 can be 26mm, and its width perpendicular to the direction D2 can be 6mm. The distal end 3b can also be inclined at an angle so that the edge of the distal end is perpendicular to the direction D1 in the holding position. In this way, the hook 3 can effectively prevent the external structure from sliding on the outer surface S of the guiding device 1 in the direction of the clamping end 1b.
 Finally, the hook 3 can have a notch E on the side facing the bottom 1d of the cavity 1c. The notch E transfers the center of gravity of the hook 3 to the other side of the pin 2, so that when the guiding device 10 is located at a position perpendicular to the direction D1 parallel to the direction of gravity, and the end 1a is the upper end, the hook 3 is It can swing to the holding position spontaneously under the action of gravity.
 Figure 4 The specific use of the two temporary suspension elements 10 as described above is explained. Reference numeral 102 denotes a support in the shape of a rotating drive hub in the structure. The support 102 can be located on the top wall of a material deposition chamber, for example, a deposition chamber using a thermally evaporated film. The structure can be a sample carrying device, which is composed of four downwardly bent arms 101b integrally connected to a common base 101c. Hereinafter, the base 101c and the four arms 101b are collectively referred to as the structure 101. The four perforated plates 200 are later placed on the arm 101b. The hole 201 in the plate 200 is used to expose the spectacle lens 300 to evaporated substances.
 During the material deposition cycle, the structure 101 is suspended from the support 102 in the chamber. In order to do this, the base 101c can be equipped with four holes 101a, aligned with the four drill holes 102a in the support 102. The structure 101 can be connected by screws inserted into the support 102 through the hole 101a.
 We will first describe the connection of the structure 101 to the support 102. The structure 101 is initially away from the support 102. The two temporary connecting elements 10 are screwed into the two bores 102a of the support 102. If the bore 102a is vertical, the hooks 3 of the two elements swing outward to the holding position. Preferably, the two drill holes 102a used are diagonally diagonal with respect to the center of the support 102. Then, the structure 101 is slid onto the element 10 through the hole 101 a corresponding to the drilled hole occupied by the element 10. As the structure 101 is lifted, it slides along the outer surface S of the element 10, pushing the hook 3 back into its respective cavity 1c. When the structure 101 approaches the support 102, the hook 3 swings from back to the outside to the holding position, and the structure 101 can lean on the hook. As long as the two temporary suspension elements 10 are placed symmetrically with respect to the center of gravity of the structure 101 when the structure 101 is connected to the support 102, the structure 101 is suspended on the hook 3 in a stable and balanced state. Then, the two screws 11 are introduced into the two unoccupied holes 101a, and screwed into the corresponding drilled holes 102a. The length of the screw 11 must be long enough so that when the structure 101 rests on the hook 3, the length of the screw 11 can span the distance between the support 102 and the structure 101. Tightening the screw 11 gradually raises the structure 101 above the hook 3 and presses it on the support 102. Then, the temporary suspension element 10 is unscrewed and replaced with two other screws 12.
 When the structure 101 is in this state, to disassemble it, first remove two of the four screws, preferably two screws 12 diagonally opposite. It is replaced by two temporary suspension elements 10. The hook 3 of each of these elements swings to the holding position spontaneously. Then, the other two screws 11 are partially unscrewed, so that the structure 10 is lowered to the position of the hook 3. Then completely remove the two screws 11 at the back. Finally, the operator holds the bottom of the structure 101 and slides the two hooks 3 into the cavity 1c, and then slides the structure along the element 10 to gradually lower it.
 It should be understood that by changing certain details in the description given, the present invention can be reproduced while at least some of the advantages listed are retained. In particular, the described dimensions are only provided as examples.