Portable eye tracker support

Abstract

The invention discloses a portable eye tracker support which is suitable for a notebook computer or a desk computer display to serve as a tested machine at the same time, and different postures are adopted under the two conditions. The support comprises a support base assembly (21) and a three-joint mechanical arm which is arranged on the support base assembly (21) and composed of a large arm assembly (22), a small arm assembly (23) and a wrist assembly (24) connected with an eye tracker, the support base assembly (21), the large arm assembly (22), the small arm assembly (23) and the wrist assembly (24) are sequentially hinged, and the rotating axis of the large arm assembly (22), the rotating axis of the small arm assembly (23) and the rotating axis of the wrist assembly (24) are parallel to one another. The large arm assembly (22), the small arm assembly (23) and the wrist assembly (24) only have the freedom degrees of rotating around the rotating axes of the large arm assembly (22), the small arm assembly (23) and the wrist assembly (24) and are each provided with a driving device so that posture adjustment can be achieved.

Description

[0001] This application is a divisional application of the invention patent application titled "Portable Eye Tracker Assistance Kit and Portable Eye Tracker with the Same" with the application number 202411755023.3, which was filed by the applicant on December 3, 2024. Technical Field

[0002] The present invention relates to related devices for determining or recording eye movements, and specifically to a portable eye tracker assistance kit and a portable eye tracker with the same. Background Art

[0003] An eye tracker is a device that can track and measure the position of the eyeball and eye movement information, and has extensive applications in the research of visual systems, psychology, and cognitive linguistics.

[0004] See Figure 15 , in the prior art, a portable eye tracker usually includes the following components: a laptop computer 4, a portable host computer (not shown), an eye tracker 3, a laptop stand 5, and response devices such as a key device.

[0005] The laptop computer serves as the test machine to present stimuli, the host computer is used to run programs and process various data, the portable eye tracker is used to record the eye movement trajectory characteristics of the subject when processing visual information, and independent or laptop-integrated external devices such as keys and mice serve as response devices, which can obtain the subject's response or confirmation to the stimuli. All the above hardware structures are data-connected.

[0006] See Figure 16 , a typical structure of the laptop stand 5 includes a left support foot 51, a right support foot 52, a stand body 53, a stand connector 54, and a clamping knob 55.

[0007] The stand body 53 is generally rectangular and long, and a cavity 534 for accommodating the main body connection part 541 of the stand connector 54 is provided in the middle; grooves 531 are opened at the bottoms of both sides of the stand body 53, and a plurality of positioning grooves 532 are provided at the same interval in the grooves 531.

[0008] The left support foot 51 includes a vertical section 511 and a left horizontal section 512 that are perpendicular to each other. The cross-section of the left horizontal section 512 is hexagonal, which is matched with the groove 531, and a notch 514 for the screw 513 to pass through and a groove 516 for accommodating the nut 515 are provided. The right support foot 52 is symmetrically arranged with the left support foot, but a protrusion 523 that can be matched with the positioning groove 532 is provided at the end of the horizontally arranged right horizontal section 522, and a through hole for the threaded rod of the clamping knob 55 to pass through is provided at the connection between the horizontal section 522 and the vertical section 521. Screw holes 542 are provided on the stand connector 54, and it is fixed to the eye tracker 3 by screws.

[0009] The left side of the main body connection part 541 of the bracket connector 54 is connected to the bracket main body 53 by screws 543, and correspondingly, holes for accommodating the screws 543 are provided on the left side of the main body connection part 541. During installation, after the main body connection part 541 is arranged in the cavity 534 of the bracket main body 53, the bracket main body 53 and the left side of the main body connection part 541 are connected by screws 543. The clamping knob 55 has a knob part 551 and a threaded rod 552. The threaded rod 552 can pass through the holes in the right support leg 52 and the bracket main body 53 and be threadedly connected to the right side of the main body connection part 541 of the bracket connector 54.

[0010] After the eye tracker 3 is installed on the notebook bracket 5, the left support leg 51 and the right support leg 52 clamp the C surface of the notebook computer 4, and the clamping width and the angle of the eye tracker can be adjusted within a certain range. The adjustment methods are as follows: For the clamping width, after the protrusion 523 of the right support leg 52 is inserted into the positioning groove 532 at an appropriate position at the bottom of the bracket main body 53, the screws 513 and nuts 515 on that side are tightened. The end of the left horizontal section 512 of the left support leg 51 has no protrusion and slides horizontally to an appropriate position and is then locked by another screw 513 and nut 515; For the angle of the portable eye tracker, after the two support legs are locked, the bracket connector 54 is adjusted to the required angle, and its locking with the bracket main body 53 is achieved by tightening the screws 543 and the clamping knob 55.

[0011] See Figure 17 , Another common situation is to use a desktop computer monitor as the test machine, and the eye tracker 3 is installed on the tripod bracket 6. A typical structural example of the tripod bracket 6 refers to the patent document CN204692962U. The bracket disclosed in this document is provided with an attachment element 61 to connect the eye tracker 3, and a plurality of support legs 62 that can be rotated to open / close and have adjustable lengths, as well as a universal ball joint 63 and a stop device 64 to cooperate to achieve the adjustment and locking of various heights and XYZ three-way rotation angles.

[0012] See Figure 17 , The application of the lightweight head support 7 is also relatively common. It can reduce the movement of the subject's head and can be applied to various occasions such as using a notebook computer or a desktop computer monitor as the test machine.

[0013] The common lightweight head support 7 includes a head support member 71, a height adjustment component 72, a base element 73, and a desktop fixing structure 74. The height adjustment component 72 includes a locking member 721, an annular tapered orifice member 723, a hollow pipe fitting 725, and a C-shaped member 726. The rod body 711 at the lower part of the head support member 71 is a smooth shaft, which can slide up and down in the hollow pipe fitting 725, and the annular tapered orifice member 723 and the C-shaped member 726 placed on the top of the hollow pipe fitting 725 are sleeved on the outside. The main body of the locking member 721 is a hollow cylinder, with a reduced opening 722 at the upper part and an internal thread structure 724 arranged on the inner side of the lower part. The upper end of the hollow pipe fitting 725 is provided with a matching external thread. Two threaded rods are arranged at the bottom of the base element 73, and a manual nut 741 and a claw 742 are arranged on each threaded rod.

[0014] After manually loosening the locking member 721, adjust the height of the head support member 71. After reaching the position, tighten the locking member 721. The C-shaped member 726 is squeezed to shrink by the conical surface of the annular tapered orifice member 723 opposite to the reduced opening 722, so as to lock the rod body 711 and the head support member 71, thereby realizing the fixation of the height. Manually tighten / loosen the manual nut 741 on the desktop fixing structure 74, and the fixation / release of the claw 742 and the test desktop can be realized.

[0015] For the above-mentioned kit and the previous structures, they can meet the basic usage requirements of the eye tracker, but for the application scenarios of the eye tracker, there are still some deficiencies. For example:

[0016] 1. The eye tracker should be horizontally centered relative to the notebook screen or the desktop computer monitor. When the notebook stand adapts to different notebook width sizes, the minimum adjustment unit of the right support foot 52 is the spacing of the positioning groove 532, and the adjustment amount needs to be determined after measuring the overall width of the screen. At the same time, the adjustment requires loosening the screw 513 and the nut 515 first, making the centering adjustment relatively inconvenient; in addition, this spacing adjustment will loosen the connection of the threaded rod 552 of the clamping knob 55, thereby making the locking of the eye tracker angle ineffective, and it is necessary to adjust and lock the angle of the portable eye tracker again after the left and right support feet and the centering adjustment are completed;

[0017] 2. Except for the pitching movement of the eye tracker relative to the horizontal edge line of the notebook computer or the desktop computer monitor screen, there is no other rotation requirement in the horizontal and vertical planes, which can be verified by the structure of the notebook stand; the triangular stand, as a general-purpose stand, has redundant degrees of freedom, making it necessary to take into account the adjustment of the horizontal height, horizontal rotation angle, etc. during the height and angle adjustment of the portable eye tracker, and this kind of adjustment is overall inefficient;

[0018] 3. When using a desktop computer monitor, the horizontal height of the subject's eyes should be level with about one-fourth of the upper part of the monitor. Therefore, the height of the lightweight head support needs to be determined after measuring multiple dimensions such as the height of the vertical monitor screen and the morphological facial length of the subject (the length from the eyes to the chin). Only after it is adjusted in place can subsequent adjustments such as the position and angle of the eye tracker be carried out;

[0019] 4. In the above structure, each step is manually adjusted and cannot be linked, resulting in low overall efficiency, which is particularly obvious when there are many types of subjects and multiple adjustments are required. Summary of the Invention

[0020] The present invention provides a portable eye tracker support, aiming to solve at least one of the above technical problems.

[0021] The present invention provides a portable eye tracker auxiliary kit, which can quickly and accurately find the best measurement pose whether using a desktop computer monitor as the test machine or a laptop as the test machine.

[0022] According to one aspect of the embodiment, a portable eye tracker support includes: a support base assembly and a three-joint robotic arm disposed thereon, which is composed of a large arm assembly, a small arm assembly, and a wrist assembly for connecting the eye tracker. The support base assembly, the large arm assembly, the small arm assembly, and the wrist assembly are sequentially hinged. The rotation axes of the large arm assembly, the small arm assembly, and the wrist assembly are parallel to each other. The large arm assembly, the small arm assembly, and the wrist assembly each have only the degree of freedom to rotate around their respective rotation axes and all have drive devices.

[0023] In some examples, the support base assembly includes a fixed foot portion and a right movable foot and a left movable foot that are movably disposed on the foot portion and can freely expand and contract along the width direction of the test machine to adapt to the size of the test machine. When moving one or both of the left movable foot and the right movable foot, the two open and close synchronously and move the same distance.

[0024] In some examples, the foot portion is U-shaped and includes two symmetrically arranged feet and a horizontal section connecting the two feet.

[0025] In some examples, both the right movable foot and the left movable foot are L-shaped. The right movable foot has a right foot vertical section and a right foot horizontal section, and the left movable foot has a left foot vertical section and a left foot horizontal section. The right foot horizontal section and the right foot vertical section are provided with racks, and the two are engaged by gears.

[0026] In some examples, a foot return spring is provided between the left foot horizontal section and the horizontal section of the foot portion to keep the right movable foot and the left movable foot in a tendency of moving towards each other.

[0027] In some examples, a foot buffer is provided on the horizontal section of the foot part, which contacts the end face of the right foot horizontal section when the right movable foot and the left movable foot are reset.

[0028] In some examples, positioning tabs are provided on both the vertical section of the right foot and the vertical section of the left foot, which are used to clamp the edge of the laptop when using the laptop as the test machine, and can enter the storage state when the laptop is not used as the test machine.

[0029] In some examples, the right foot horizontal section and the left foot horizontal section respectively have claws extending towards the back of the screen of the test machine.

[0030] In some examples, a driving device installation part is connected to the foot part. It is U-shaped, and large arm support bearings are symmetrically arranged on the two vertical side walls. The large arm assembly includes a large arm driving device and separately arranged large arm left rod, large arm right rod and large arm shaping part; the large arm left rod, large arm right rod and large arm shaping part are connected to form an H-shaped structure. A large arm left flange is installed on the large arm left rod, and a large arm right flange is installed on the large arm right rod. The large arm left flange and the large arm right flange respectively cooperate with the inner rings of the large arm support bearings installed on the two vertical side walls of the driving device installation part to support the rotation of the H-shaped structure around the bracket base assembly. The large arm driving device is fixed on one of the vertical side walls of the driving device installation part to drive the rotation of the H-shaped structure.

[0031] In some examples, the small arm assembly is driven by a small arm driving device installed on the other vertical side wall of the driving device installation part and rotates around its hinge axis with the large arm assembly.

[0032] In some examples, the wrist assembly is connected to a wrist driving motor (2302) installed on the small arm assembly through a transmission chain, and the wrist driving motor drives the wrist assembly to perform pitching motion around its hinge axis with the small arm assembly.

[0033] Thus, the present invention can achieve the following beneficial effects:

[0034] 1. The centering adjustment of the portable eye tracker bracket is simple: the moving distances of the left and right movable feet are the same, and the synchronous forward / backward movement can be realized; the setting of the claws on the left and right feet enables the convenience of centering when using a desktop computer monitor as the test machine.

[0035] 2. The portable eye tracker bracket has no redundant rotational degrees of freedom, and the centering adjustment is independent of the height and pitching angle adjustment of the eye tracker, with high overall adjustment efficiency.

[0036] 3. The portable eye tracker bracket realizes the integration of different brackets in two modes of using a laptop and a desktop computer monitor as the test machine, reduces the number of components carried by the user, and lowers the assembly difficulty.

[0037] 4. The head support device and the portable eye tracker bracket are associated through a control system, and the attitude can be automatically adjusted or manually adjusted by the user. The efficiency is high and the convenience is strong during multiple adjustments. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 is a schematic diagram of the overall structure when the present invention is applied to a laptop computer;

[0039] Figure 2 is a schematic diagram of the overall structure when the present invention is applied to a desktop computer monitor;

[0040] Figure 3 is an exploded view of the structure of the head support device of the present invention;

[0041] Figure 4 is a schematic diagram of the overall structure of the portable eye tracker bracket of the present invention;

[0042] Figure 5 is an exploded view of the base assembly of the portable eye tracker bracket of the present invention;

[0043] Figure 6 is a schematic diagram of the adjustment range of the base assembly of the portable eye tracker bracket of the present invention;

[0044] Figure 7 is an exploded view of the large arm assembly of the portable eye tracker bracket of the present invention;

[0045] Figure 8 is the present invention Figure 7 A-A rotational cross-sectional view in;

[0046] Figure 9 is an exploded view of the small arm assembly and the wrist assembly of the portable eye tracker bracket of the present invention;

[0047] Figure 10 is the present invention Figure 9 B-B sectional view in;

[0048] Figure 11 is a schematic diagram of the structure of the wrist drive pinion of the portable eye tracker bracket of the present invention;

[0049] Figure 12 is the present invention Figure 10 Schematic view in the direction of C;

[0050] Figure 13 is a schematic diagram of two postures of the portable eye tracker bracket of the present invention;

[0051] Figure 14 is a schematic diagram of the target posture of the portable eye tracker auxiliary kit of the present invention;

[0052] Figure 15 is a schematic diagram of the overall structure of an existing portable eye tracker kit;

[0053] Figure 16 is a schematic diagram of the overall structure of an existing laptop stand;

[0054] Figure 17 is a schematic diagram of the overall structure of an existing tripod and lightweight head support. Detailed implementation manners

[0055] Unless otherwise defined, the technical terms or scientific terms used herein shall have the ordinary meanings as understood by those of ordinary skill in the art to which the present invention pertains. Words such as "first", "second" and the like do not denote any order, quantity or importance, but are only used to distinguish different components. Words such as "comprising" or "including" mean that the elements or objects appearing before this word cover the elements or objects listed after this word and their equivalents, without excluding other elements or objects. Words such as "connected" or "coupled" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Upper", "lower", "left", "right", etc. are only used to represent relative positional relationships, and when the absolute position of the object being described changes, the relative positional relationship may also change accordingly. The coordinate system indicating the orientation is given in the accompanying drawings of the specification.

[0056] Refer to Figure 1 、 Figure 2 , the auxiliary kit of the portable eye tracker of the present invention includes an automatically adjustable head support device 1, a portable eye tracker stand 2 and a control system (not shown). A laptop or desktop computer monitor can be used as the test machine, and the portable eye tracker stand 2 adopts different postures in two cases.

[0057] As Figure 3 shown, the head support device 1 has a head support assembly 11, a base 12, a lifting control assembly 13 and a desktop locking assembly 14.

[0058] The head support assembly 11 has a chin rest 111 adapted to the shape of the human chin. The chin rest 111 is connected to a sliding cylinder 113 through a connecting element 112. The connecting element can be a threaded structure or a snap structure. The main body of the sliding cylinder 113 is a hollow cylinder, and a guiding groove 114 is provided along the generatrix direction on the outer cylindrical surface; the internal cavity can accommodate and position the protruding structure of the nut seat 115. The outer diameter of the sliding cylinder 113 is not less than the outer diameter of the nut seat, and an installation hole for connecting the screw on the nut seat 115 is provided at the bottom.

[0059] The base 12 includes a hollow tube 121 for the sliding cylinder 113 to move up and down and a base 122.

[0060] On the cylindrical surface of the hollow tube body 121 close to the subject side, a threaded hole 123 is opened. The guiding and locking member 124 is a screw with a handle. When screwed into the threaded hole 123, it is inserted into the guiding groove 114 of the sliding cylinder body 113. When the screwing depth is relatively shallow, the end of the stud does not press the guiding groove 114, realizing the guiding of the lifting of the sliding cylinder body 113; after the sliding cylinder body 113 is lifted and lowered in place, the guiding and locking member 124 is tightened so that its end face is in close contact with the guiding groove 114, realizing the locking of the position of the sliding cylinder body 113. In some embodiments, staggered tooth shapes, protrusions and grooves and other structures can be provided on the end face of the guiding and locking member 124 and the guiding groove 114 to strengthen the locking effect; or the guiding and locking member 124 is a plug pin, and a plurality of slots are arranged at intervals on the sliding cylinder body 113, and the plug pin is inserted into the slot to realize the locking of the position of the sliding cylinder body 113.

[0061] In some embodiments, an image recognition device 125 is provided on the cylindrical surface of the hollow tube body 121 close to the test machine side, which can obtain parameters such as the distance between the head support assembly 11 and the screen of the test machine, the horizontal height relative to the top of the screen, and the inclination angle of the screen through image recognition. The image recognition device 125 can be a camera. Measuring the distance and angle by the camera (detecting parameters such as the distance between the head support assembly 11 and the screen of the test machine, the horizontal height relative to the top of the screen, and the inclination angle of the screen) is a conventional technique.

[0062] The base 122 is fixedly connected to the hollow tube body 121, and has a cavity 127 inside for accommodating the sliding cylinder body lifting motor 131 of the lifting control assembly 13 and the locking claw lifting motor 141 of the desktop locking assembly 14. The connecting part of the hollow tube body 121 and the base 122 is provided with an installation positioning structure 126 for the sliding cylinder body lifting motor 131 and corresponding screw holes.

[0063] The lifting control assembly 13 includes a sliding cylinder body lifting motor 131, which is a ball screw stepping motor.

[0064] The desktop locking assembly 14 includes a locking claw lifting motor 141, a base bottom cover 142, a locking claw guide rail 144, and a locking claw 145. The locking claw lifting motor 141 is a ball screw stepper motor. The base bottom cover 142 is provided with an opening and screw holes for installing and positioning the locking claw lifting motor 141, and a guide rail mounting threaded hole 143 for installing the end of the locking claw guide rail 144. A plurality of screw holes for connecting with the base 122 are provided around the base bottom cover 142. The upper end of the locking claw guide rail 144 is provided with threads, and the lower end is a smooth shaft. The locking claw is integrally of a J-shaped structure, and a locking claw lifting motor nut seat mounting hole 146 and corresponding threaded holes are provided on the front side, and two guiding through holes 147 for cooperating with the lower smooth shaft of the locking claw guide rail 144 are provided in the middle. The connecting line of the axes of the locking claw lifting motor nut seat mounting hole 146 and the two guiding through holes 147 forms an isosceles triangle in the horizontal section, so that when both locking claw guide rails 144 are tightly attached to the desktop edge, the head support device 1 can be ensured to face the direction perpendicular to the desktop.

[0065] In some embodiments, the sliding column lifting motor 131 and the locking claw lifting motor 141 can also be a combination of a stepper motor, a coupling, and a ball screw; it can be judged whether the locking claw 145 is in place by means of motor current, moving distance, etc. The desktop locking assembly 14 can also adopt the manual form in the background art, and at this time, the structure of the base 122 can be designed to be more compact.

[0066] Figure 4 It is a schematic diagram of the overall structure of the portable eye movement instrument bracket 2 of the present invention. As Figure 4 shown, the main body of the portable eye movement instrument bracket 2 is a three-joint robotic arm, including a bracket base assembly 21, a large arm assembly 22, a small arm assembly 23, and a wrist assembly 24.

[0067] Figure 5 It is an exploded view of the base assembly 21 of the portable eye movement instrument bracket 2, and it is the Figure 4 upward viewing direction. Refer to Figure 5 , the bracket base assembly 21 includes a bracket base 2101, and the bracket base 2101 includes a driving device installation part 2102, a foot part 2103, a right movable foot 2104, a synchronous gear 2105, a left movable foot 2106, and a base cover plate 2107.

[0068] The main body of the driving device installation part 2102 is U-shaped in the front view reference plane, and positioning holes 2108, driving device output shaft through holes 2109, driving device installation holes 2110, and large arm support bearing installation holes 2111 for installing the small arm driving device 2139 and the large arm driving device 2140 are symmetrically arranged on its two vertical side walls. Both the small arm driving device 2139 and the large arm driving device 2140 are stepper motors with integrated reducers. The driving device installation holes 2110 are evenly distributed in the circumferential direction by 4. Refer to Figure 5 、Figure 7 and Figure 13 For Figure 13 , both vertical side walls of the driving device installation part 2102 are integrally inclined downward in the rearward direction, so that the wrist assembly 24 has a larger angle adjustment space in the low position attitude after the eye tracker 3 is assembled.

[0069] The foot part 2103 is in an inverted U shape on the upper viewing reference plane (horizontal plane), and it has two symmetrically arranged feet 2112 and a horizontal section 2113 connecting the two feet 2112. The two feet 2112 are strip-shaped and extend forward in a direction perpendicular to the horizontal section 2113. The horizontal section 2113 rises relative to the feet 2112, so that after the base cover plate 2107 covers the horizontal section 2113, the cover plate 2107 is flush with the feet 2112. The middle of the horizontal section 2113 has a main groove 2114, which can accommodate the main body parts of the right movable foot 2104 and the left movable foot 2106; the rear side edge has two symmetrically arranged claw grooves 2115; the center position has a first stepped hole 2116 for installing and positioning the synchronous gear 2105; the left rear corner (the end facing the left movable foot 2106) is provided with a buffer mounting boss 2119 and an avoidance groove 2117 for installing the foot buffer 2118. The outer circumference of the foot buffer 2118 is a full thread, and the installation position can be adjusted through the threaded hole provided in the buffer mounting boss 2119. The front side wall of the buffer mounting boss 2119 and the front side wall of the main groove 2114 play a guiding role for the main body of the left movable foot 2106; the right front corner (the part near the foot 2112 at the end facing the right movable foot 2104) is provided with a guiding boss 2120, and the guiding boss 2120 and the rear side wall of the main groove 2114 play a guiding role for the main body of the right movable foot 2104; semi-cylindrical protrusions 2121 are provided on both the left and right sides of the main groove 2114 as the guiding and limit stops inside the right movable foot 2104 and the left movable foot 2106. A threaded hole for installing the spring fixing screw 2122 is provided between the guiding boss 2120 and the front side wall of the main groove 2114 on the horizontal section 2113.

[0070] The right movable support leg 2104 and the left movable support leg 2106 as a whole are both L-shaped. The right movable support leg 2104 has a right leg vertical section 2123 and a right leg horizontal section 2124, and the left movable support leg 2106 has a left leg vertical section 2134 and a left leg horizontal section 2132. The bottom surfaces of the right leg vertical section 2123 and the left leg vertical section 2134 are flush with the bottom surface of the support leg 2112, so that the bottom surface is at the same horizontal level, and a plurality of positioning tabs 2125 are provided on the bottom surfaces of the right leg vertical section 2123 and the left leg vertical section 2134, which are used to clamp the edge of the laptop when the laptop is used as the test machine, and can enter the storage state when the laptop is not used as the test machine without affecting the horizontality of the bottom surface of the support base assembly 21. In some embodiments, the positioning tabs 2125 are hinged to the right leg vertical section 2123 and the left leg vertical section 2134 along the axis in the front-rear direction, can be flipped to the vertical state during use, and are positioned by relying on the stepped surface on the hinge side, and are flipped into the receiving groove in the storage state; in some other embodiments, a structure such as a push-type ballpoint pen tip can be provided on the upper part of the positioning tab 2125 to realize pressing and protruding during use and returning in the storage state; in some other embodiments, through grooves can be provided on the right leg vertical section 2123 and the left leg vertical section 2134, and the positioning tab 2125 can be set as an independent insert piece matching the through groove, inserted during use and taken out in the storage state. In short, any existing technology can be adopted for the connection manner between the positioning tab 2125 and the right leg vertical section 2123 and the left leg vertical section 2134.

[0071] The right leg horizontal section 2124 of the right movable support leg 2104 has a right leg sliding notch 2126, a right leg claw 2127 protrudes backward in the middle, and a right leg rack 2128 is provided on the left side. The left leg horizontal section 2132 of the left movable support leg 2106 has a left leg sliding notch 2133, a left leg claw 2130 protrudes backward in the middle, a left leg rack 2129 is provided on the right side, and a rack avoidance groove 2131 for avoiding the right leg rack 2128 is also provided on the left leg claw 2130, and its size is set so that the left movable support leg 2106 can pass through the buffer mounting boss 2119 when sliding to the left extreme position. The right leg claw 2127 and the left leg claw 2130 can slide in the claw grooves 2115 on both sides of the horizontal section 2113 respectively, and gaskets are provided on the bottom surfaces of the ends of the two claws so that they are flush with the bottom surface of the support leg 2112.

[0072] One end of the support leg return spring 2135 is connected to the spring fixing screw 2122, and the other end is connected to the right end of the left support leg rack 2129 (the end facing the vertical section 2123 of the right support leg), so that the right movable support leg 2104 and the left movable support leg 2106 tend to move towards each other. The support leg buffer 2118 can contact the end face of the right support leg rack 2128 (the end face facing the vertical section 2134 of the left support leg) when the two support legs are reset, so as to realize the movement buffer at the end of the stroke to avoid damage caused by collision impact.

[0073] The synchronous gear 2105 includes a spur cylindrical gear, and stepped shafts and rotating shafts are arranged on both the upper and lower sides.

[0074] The right support leg rack 2128, the synchronous gear 2105, and the left support leg rack 2129 are meshed. When stretching one or both support legs, the moving distances on both sides are the same, and the synchronous movement of the two racks towards each other / backwards can be realized. This characteristic enables the support leg return spring 2135 and the support leg buffer 2118 not to be necessarily arranged on the same support leg side, making the overall layout more reasonable, and at the same time can also stably ensure the centering when the bracket is in use.

[0075] In addition, the display of a desktop computer usually has structural settings such as a base and a support frame that are symmetrically arranged about the central axis. Therefore, when using the display of a desktop computer as the test machine, by clamping the edges of the above symmetric structure with the right support leg claw 2127, the left support leg claw 2130 and the outer wall of the horizontal section 2113 of the support leg part 2103, the auxiliary kit of the portable eye tracker of the present invention can also achieve the convenience of centering in this application case.

[0076] In some embodiments, the two support legs 2112, the right support leg vertical section 2123 and the left support leg vertical section 2134 can also extend backward or simultaneously forward and backward. The left-right interval and the total length of the front-back dimension of the two support legs 2112, the right support leg vertical section 2123, the left support leg vertical section 2134, the right support leg claw 2127 and the left support leg claw 2130 are set to cover the variation range of the center of gravity within the normal set activity space of the portable eye tracker bracket 2, so as to make the overall use stable.

[0077] The base cover plate 2107 is generally rectangular in shape. On its left and right sides, first sliding positioning protrusions 2136 are provided, which match the horizontal sections 2124 of the right support leg, the horizontal section 2132 of the left support leg, and the semi-cylindrical protrusion 2121, and press the horizontal sections of the left and right support legs in the up and down directions. In the middle part, a second sliding positioning protrusion 2137 is provided. The second sliding positioning protrusion 2137 can be clamped into the main groove 2114 in the front and back directions and presses the rack 2128 of the right support leg and the rack 2129 of the left support leg in the up and down directions. A bottom-side stepped hole is provided at the center of the second sliding positioning protrusion 2137, which cooperates with the first stepped hole 2116 to realize the installation and positioning of the synchronous gear 2105. Around the first sliding positioning protrusion 2136 and the second sliding positioning protrusion 2137, screw holes and screw structures are provided to realize the fixation of the base cover plate 2107 and the horizontal section 2113 of the support leg, while taking into account the pressing and holding during sliding. An installation positioning protrusion 2138 is also provided on the front side of the middle part of the base cover plate 2107 to realize the positioning during the fixation with the horizontal section 2113 of the support leg.

[0078] Figure 6 The figure shows a schematic diagram of the adjustment range of the base assembly of the portable eye tracker bracket of the present invention, and the base cover plate 2107 has been hidden. The lower solid-line view is the contracted state, where the support leg return spring 2135 and the support leg buffer 2118 are in the contracted state, and the right support leg claw 2127 and the left support leg claw 2130 are respectively close to the sides of the two claw grooves 2115 close to the center line; the upper dashed-line view is the stretched state, where the support leg return spring 2135 and the support leg buffer 2118 are in the extended state, and the right support leg claw 2127 and the left support leg claw 2130 are respectively close to the sides of the two claw grooves 2115 far from the center line, and the right support leg sliding notch 2126 and the left support leg sliding notch 2133 respectively contact the semi-cylindrical protrusion 2121.

[0079] Figure 7 It is an exploded view of the boom assembly of the portable eye tracker bracket of the present invention. For a clearer display of the structure, some parts are made transparent. Figure 8 It is Figure 7 the A-A rotating cross-sectional view in

[0080] As Figure 7 - 8 shown, the boom assembly 22 includes a left boom rod 2202, a left boom flange 2203, a small arm drive 2204, a small arm drive connecting shaft 2205, a small arm keyless bushing 2206, a small arm link 2207, a boom shaping part 2210, a right boom flange 2212, and a right boom rod 2213.

[0081] As described above, on both vertical side walls of the drive device installation part 2102 of the support base 2101, large arm support bearing installation holes 2111 are provided, and one large arm support bearing 2201 is installed on each side.

[0082] The main body of the left arm rod 2202 is a flat and long rod. A second stepped hole 2214 for accommodating the mounting surface of the left arm flange 2203 is provided on the side connecting the arm support bearing 2201, and a third stepped hole 2215 is provided on the side connecting the forearm assembly 23. The forearm connecting left bearing 2216 is installed in the third stepped hole 2215. The left arm flange 2203 is a "convex" part, with a forearm output shaft through hole 2218 in the center, and its inner diameter is larger than the diameter of the output shaft of the forearm driving device 2139. See Figure 8 , after being fixedly connected to the left arm rod 2202 using screws, the protruding part 2217 of the left arm flange passes through the second stepped hole 2214 and fits with the inner ring of the arm support bearing 2201 on this side.

[0083] The forearm driving part 2204 is a short connecting rod part. A forearm driving shaft hole 2219 is provided at one end, and the forearm key-free bushing 2206 is installed in this hole to expand and lock the output shaft of the forearm driving device 2139 and the forearm driving part 2204; a forearm driving connection shaft through hole 2220 is provided at the other end of the forearm driving part 2204. The forearm connecting rod 2207 is a slender rod-shaped connecting part, with a connecting through hole 2221 provided at each end. The distance between the axes of the two connecting through holes 2221 is equal to the distance between the axes of the second stepped hole 2214 and the third stepped hole 2215 of the left arm rod 2202. The forearm driving connection shaft 2205 is a stepped shaft. After passing through the forearm driving connection shaft through hole 2220, it fits with the inner ring of the forearm connecting rod bearing 2208 provided in the connecting through hole 2221 at one end of the forearm connecting rod 2207, and a thread is provided at its end. The forearm driving connection shaft cover 2209 is threadedly connected to this end and axially locks the forearm connecting rod bearing 2208.

[0084] The main body of the right arm rod 2213 is a flat and long rod, with circular bosses provided at both ends. A fourth stepped hole 2223 is provided in the boss on the side connecting the arm driving device 2140, which can accommodate the arm key-free bushing 2211 and the right arm flange 2212. A fifth stepped hole 2224 is provided in the boss on the side connecting the forearm assembly 23, and the forearm connecting right bearing 2225 is installed in the fifth stepped hole 2224. The distance between the axes of the fourth stepped hole 2223 and the fifth stepped hole 2224 is equal to the distance between the axes of the second stepped hole 2214 and the third stepped hole 2215 of the left arm rod 2202. The right arm flange 2212 has the same structural form as the left arm flange 2203, and its inner diameter is larger than the diameter of the output shaft of the arm driving device 2140. See Figure 8 , after being fixedly connected to the right arm rod 2213 using screws, the protruding part of the right arm flange 2212 passes through the fourth stepped hole 2223 and fits with the inner ring of the arm support bearing 2201 on this side. The arm key-free bushing 2211 is installed in the fourth stepped hole 2223 to expand and lock the right arm rod 2213 and the output shaft of the arm driving device 2140.

[0085] A large arm shaping member 2210 is further provided between the left large arm rod member 2202 and the right large arm rod member 2213. Two cylindrical protrusions 2222 are respectively provided at both ends of the large arm shaping member 2210, which are matched with the holes provided on the left large arm rod member 2202 and the right large arm rod member 2213, and are locked by fasteners such as screws, spring washers, and gaskets.

[0086] The left large arm rod member 2202, the right large arm rod member 2213 and the large arm shaping member 2210 in the large arm assembly 22 together form an H-shaped structure. The left large arm flange 2203, the right large arm flange 2212 and the large arm support bearing 2201 form the axis around which the H-shaped structure rotates relative to the bracket base assembly 21. The above combined setting enables the weights of the large arm assembly 22 and the components such as the forearm assembly 23, the wrist assembly 24, and the eye tracker connected thereto to directly act on the bracket base assembly 21, so that the large arm driving device 2140 can only output torque to drive the H-shaped structure to swing, avoiding bearing radial bending moment during driving. At the same time, referring to Figure 7 the exploded view, the split setting of the H-shaped structure ensures the assembly convenience of the large arm assembly 22.

[0087] Figure 9 FIG. is the exploded view of the forearm assembly 23 and the wrist assembly 24 of the portable eye tracker bracket of the present invention, Figure 10 is Figure 9 the sectional view taken along line B-B in

[0088] As Figure 9 - 10 shown, the forearm assembly 23 includes a forearm box body 2301, a wrist driving motor 2302, a wrist transmission pinion 2303, a wrist transmission gear 2304, a wrist keyless bushing 2305, a forearm box body cover 2306, a wrist motor reducer 2307, a connecting seat 2308, a coupling 2309, a wrist driving shaft 2310, a wrist driving shaft bearing 2311, a bearing support cylinder 2312, a wrist first bevel gear 2313, a forearm sleeve 2314 and a wrist housing 2315.

[0089] The forearm box body 2301 is an overall hollow rectangular box body, and a partition 2316 divides it into a gear cavity 2317 and a driving device installation cavity 2318. The wrist driving motor 2302 and the wrist motor reducer 2307 are adjacent to each other and are both installed on the partition 2316 by screws. The output shaft of the wrist driving motor 2302 passes through the partition 2316 and is locked and connected to the wrist transmission pinion 2303. The input shaft of the wrist motor reducer 2307 passes through the partition 2316 and is tightly connected to the wrist transmission gear 2304 through the wrist keyless bushing 2305. The wrist transmission pinion 2303 and the wrist transmission gear 2304 are meshed and driven to transmit the torque output by the wrist driving motor 2302 to the wrist motor reducer 2307.

[0090] Referring toFigure 11 On the side of the wrist transmission pinion 2303, there is a C-shaped boss 2322, and a 1 / 4 circular cut-off groove 2323 is provided at the root, forming a cantilever part 2324. The relative fastening of the cantilever part is realized by using a screw thread fastening structure, and then the fastening connection with the output shaft of the wrist drive motor 2302 is realized. Correspondingly, operation holes 2325 for screwing the screws are respectively provided on the upper and lower sides of the forearm box body 2301.

[0091] On the right side of the forearm box body 2301, a stepped right connection boss 2319 is provided, and on the left side, a stepped left connection boss 2320 and a forearm connection boss 2321 are provided. The right connection boss 2319 is fitted with the inner ring of the right forearm connection bearing 2225; the axis of the left connection boss 2320 coincides with the axis of the right connection boss 2319 and is fitted with the inner ring of the left forearm connection bearing 2216; the forearm connection boss 2321 is fitted with the inner ring of the forearm connecting rod bearing 2208, and a thread is provided at the end, and the axial locking of the forearm connecting rod bearing 2208 is realized through the forearm connection boss cover 2326. The step sizes of the right connection boss 2319 and the left connection boss 2320 are set such that the center line of the reducer is located in the symmetry plane of the portable eye movement instrument bracket 2 in the left-right direction to ensure the centering of the eye movement instrument after final installation. At the same time, the forearm transmission chain including the forearm connecting rod 2207 and the wrist drive motor 2302 are respectively located on both sides of the center line, and the layout and weight distribution are more balanced. In addition, the distance between the axes of the left and right connection bosses 2320, 2319 and the forearm connection boss 2321 is equal to the distance between the axes of the aforementioned forearm drive shaft hole 2219 and the forearm drive connection shaft through hole 2220. Thus, the connecting lines of the intersections of the above four axes and the right viewing reference plane form a parallelogram, so that the rotation of the forearm drive member 2204 can be converted into the swing of the forearm assembly 23 (see Figure 4 、 Figure 13 ).

[0092] In some embodiments, related accessories such as the forearm drive member 2204, the forearm connecting rod 2207, the forearm connection boss 2321 and the bearing can be omitted, and the forearm drive device 2139 is arranged on the rotation axis of the forearm assembly 23 to directly drive the forearm assembly 23 to rotate.

[0093] The output shaft of the wrist motor reducer 2307 is connected to the wrist drive shaft 2310 through a coupling 2309, transmitting torque to the first wrist bevel gear 2313 connected to the front end of the wrist drive shaft. The forearm sleeve 2314 is fixedly connected to the wrist motor reducer 2307 through a connecting seat 2308. In some embodiments, a positioning structure additional to the connecting seat 2308 and the forearm housing 2301 can also be provided. A cavity for accommodating the coupling 2309 is provided at the rear side of the forearm sleeve 2314, and a stepped hole for accommodating two relatively arranged wrist drive shaft bearings 2311 is provided in the middle. The shaft diameter of the wrist drive shaft 2310 gradually decreases from the rear to the front. An outer sleeve of a bearing support cylinder 2312 is also sleeved on the shaft section between the two wrist drive shaft bearings 2311 to support the inner rings of the two wrist drive shaft bearings 2311. See Figure 12 , a rectangular section 2327 that mates with the first wrist bevel gear 2313 is provided at the front end of the wrist drive shaft 2310 to transmit torque, and at the same time, an annular groove 2328 is provided to install a snap ring to achieve axial positioning of the first wrist bevel gear 2313.

[0094] The wrist assembly 24 includes a wrist frame 2401, a wrist bearing 2402, a second wrist bevel gear 2403, a wrist balance shaft 2404, and a fixing knob 2405.

[0095] The front part of the wrist housing 2315 is in the shape of a hollow cylinder and can accommodate the meshing first wrist bevel gear 2313 and second wrist bevel gear 2403. A stepped hole is provided on each of the left and right sides to install the wrist bearing 2402. The rear part is in the shape of a hollow cuboid, and the left and right sides of the rear part are connected to the front part of the forearm sleeve 2314 through a screw and positioning pin structure (not shown in the figure).

[0096] The wrist frame 2401 is in the shape of an H. The boss of the second wrist bevel gear 2403 passes through the wrist bearing 2402 on one side of the wrist housing 2315 and is fixedly connected to the rear part of the corresponding side of the wrist frame 2401 through screws and pins; after the wrist balance shaft 2404 is inserted into the rear part of the corresponding side of the wrist frame 2401 from the other side, it is fixedly connected to the wrist frame 2401 through screws and is in fit with the inner ring of the wrist bearing 2402 on this side of the wrist housing 2315. The above settings provide support on both sides of the wrist rotation axis. During assembly, the wrist housing 2315 and the wrist bearings on both sides can be assembled first, and then the second wrist bevel gear 2403, the wrist frame 2401, and the wrist balance shaft 2404 can be assembled in sequence, and then this sub-assembly can be assembled with the forearm sub-assembly.

[0097] The fixing knob 2405 can be connected and positioned with the connection hole below the eye tracker 3. A corresponding positioning structure is provided on the mating surface at the front side of the wrist assembly 24.

[0098] With the above structure, the boom driving device 2140 can drive the boom assembly 22 to rotate around the axis of its output shaft, and the forearm driving device 2139 can drive the forearm driving member 2204 to rotate around the axis of its output shaft, thereby pushing the forearm link 2207 and the forearm connecting boss 2321, so that the forearm assembly 23 rotates around the axes of the left connecting boss 2320 and the right connecting boss 2319. The wrist driving motor 2302 can drive the wrist assembly 24 to rotate around the axis of the wrist second bevel gear 2403 through a transmission chain composed of the wrist transmission pinion 2303, the wrist transmission large gear 2304, the wrist motor reducer 2307, the wrist driving shaft 2310, the wrist first bevel gear 2313 and the wrist second bevel gear 2403, completing the pitching angle adjustment of the eye tracker 3 connected thereto.

[0099] The purpose of setting the wrist transmission pinion 2303, the wrist transmission large gear 2304 and the driving device installation cavity 2318 of the forearm box body 2301 is to make the front-to-back dimension of the portable eye tracker support 2 compact. In some embodiments, a stepper motor or a servo motor with or without an integrated reducer can be directly used as the driving device of the wrist driving shaft 2310.

[0100] Figure 13 These are two posture schematic diagrams of the portable eye tracker support of the present invention. The left side is the posture schematic diagram when the test machine is a laptop computer, and the right side is the posture schematic diagram when the test machine is a desktop computer monitor. When corresponding to monitors of different heights, the posture of the portable eye tracker support can be adjusted.

[0101] The auxiliary kit of the portable eye tracker of the present invention also has a control system (not shown). The control system includes: a controller; a driving circuit for driving the motors of the head support device 1 and the portable eye tracker support 2.

[0102] The control system can acquire and control the heights of the head support assembly 11 and the desktop locking assembly 14, and the rotation angles of the upper arm assembly 22, the forearm drive 2204, and the wrist rest 2401, and can adopt open-loop or closed-loop control. Under open-loop control, each component can be initialized to the zero point and then moved to the set position. Under closed-loop control, the existing technologies are adopted for obtaining the height and rotation angle. For example, the height can be measured by a displacement sensor, a grating scale, a reflection ranging sensor, etc., and the rotation angle can be measured by an absolute encoder, an angle sensor, a circular grating, etc. The control system also has an input device, and the user can input the type of the subject, such as adult or child, the type of the screen, such as a laptop computer or a desktop computer monitor, and its height, and the forward and reverse rotation angles or the number of turns of each motor of the portable eye tracker support 2. In some embodiments, the control device can also automatically determine the type of the test machine, the screen height, the distance, etc. based on the picture obtained by the image recognition device 125. In some embodiments, the control system includes a software system configured on a computer, and the input device is an input peripheral of the computer, such as a keyboard, a mouse, etc. The above information is input into the software system by using the input peripheral, and the software system controls each motor of the head support device 1 and the portable eye tracker support 2 through a drive circuit based on the information input by the user. It should be noted that the input device can also be independently configured as an auxiliary kit of the portable eye tracker of the present invention. For example, it is a terminal with a display screen, and the controller and the drive circuit can also be integrated in the terminal, and the head support device 1 and the portable eye tracker support 2 are controlled by using the terminal.

[0103] See Figure 14 , the following describes the specific usage method of the auxiliary kit of the portable eye tracker of the present invention when using a desktop computer monitor screen as the test machine:

[0104] Step 1: Preparation: Adjust the locking claw 145 of the head support device 1 to a position where it can clamp the experimental desktop, make the locking claw guide rail 144 of the head support device 1 close to the edge of the experimental desktop, make the chin rest 111 symmetric about the vertical symmetry plane of the test machine screen in the left-right direction, and determine the front-back direction distance L1 between the head support device 1 and the test machine screen, and lock the locking claw 145; Assemble the portable eye tracker support 2 and the eye tracker 3, adjust the portable eye tracker support 2 to an appropriate position in the front-back direction, determine the front-back direction distance L2 between the head support device 1 and the rotation axis of the upper arm of the support 2, and use the support base assembly 21 of the portable eye tracker support 2 to adjust the left-right direction position of the eye tracker 3 to make the eye tracker 3 symmetric about the vertical symmetry plane of the test machine screen in the left-right direction;

[0105] Step 2: Obtain the current attitude information of the head support device 1 and the portable eye tracker bracket 2: including the height dimension of the current position of the chin rest 111, and the current angles of the upper arm assembly 22, the forearm assembly 23, and the wrist assembly 24;

[0106] Step 3: Solve the target attitude: In the target attitude, the horizontal height of the subject's eyes should be flush with about one-fourth of the height from the upper edge of the display screen downward, the eye tracker is oriented towards the subject's eyeball, maintaining an appropriate distance d, and its vertical position is as high as possible without affecting the subject's line of sight.

[0107] In this step, the control system (controller or computational software system, the same hereinafter) can obtain the necessary information for solving the target attitude: the type of the subject, such as adult or child. The control system can store the corresponding data of the morphological face length g of different subject types, and this data can also be input by the user through the input device; the type of the screen, such as a laptop or a desktop computer monitor, the height H1 from the bottom point C of the screen to the desktop, and the distance between the bottom point C and the top point D of the screen, that is, the screen height H2;

[0108] The distances L1, L2, and the heights H1, H2 are input by the user, or calculated by the control system based on the pictures obtained by the image recognition device 125, or obtained by the sensors set accordingly;

[0109] Step 4: Solve and adjust: The geometric expression of the target attitude in Figure 14 is:

[0110] (1) The horizontal height of the subject's eyes should be flush with about one-fourth of the upper part of the display: The subject's eyeball is point A, the viewing point on the screen is E, and the horizontal line of sight AE of the subject is horizontal; the distance DE is about 0.25×H2; thus:

[0111] H3 = H1 + 0.75×H2 - g;

[0112] (2) The eye tracker is oriented towards the subject's eyeball: The center point of the front plane of the eye tracker is G, and the vertex of the upper edge of the front plane is F. The connection line AG is perpendicular to the connection line GF;

[0113] The eye tracker maintains an appropriate distance d from the subject's eyeball: In the normal mode (remote mode relative to the eye tracker), d is about 45 cm;

[0114] The position of the eye tracker is as high as possible without affecting the subject's line of sight: The point F is not higher than the connection line between points A and C.

[0115] Meanwhile, the control system stores the following parameters determined based on the hardware structure of the portable eye tracker and the bracket 2: the height e from the rotation axis of the large arm assembly 22 to the test tabletop, the distance from the rotation axis of the large arm assembly 22 to the rotation axis of the small arm assembly 23, i.e., the length a of the large arm, the distance from the rotation axis of the small arm assembly 23 to the rotation axis of the wrist assembly 24, i.e., the length b of the small arm, the distance h from the rotation axis of the wrist assembly 24 to the upper top surface of the eye tracker, and the distance w from the rotation axis of the wrist assembly 24 to the front plane of the eye tracker.

[0116] The control system solves for the target height H3 of the head support device 1 and the rotation angles θ1 of the large arm assembly 22, θ2 of the small arm assembly 23, and θ3 of the wrist assembly 24 of the portable eye tracker bracket 2 based on the above information, further calculates the conversion steps from the current posture to the target posture, and controls the corresponding driving devices to adjust to the proper positions.

[0117] When the type of the subject or the test machine is adjusted during the experiment, steps 2-4 can be repeated, and the postures of each joint can also be manually adjusted by the user.

[0118] In some embodiments, only one of the head support device 1 and the portable eye tracker bracket 2 of the present invention can also be used. Meanwhile, the control system obtains the corresponding required data: for example, when only the head support device 1 is used, the height dimension of the current position of the chin rest 111, the type of the subject and the corresponding data, the type of the screen, such as a laptop computer or a desktop computer monitor, and its height, distance, and other information can be obtained; the image recognition device 125 can also be used to determine whether the centering / angle / height of the tripod 6 in the prior art meets the requirements, for example, and issue a prompt in a timely manner; when only the portable eye tracker bracket 2 is used, the target rotation angles of the large arm assembly 22, the small arm assembly 23, and the wrist assembly 24 can be solved based on the obtained eye / pupil positions of the subject, or the rotation angles of the large arm assembly 22, the small arm assembly 23, and the wrist assembly 24 can be adjusted in response to follow-up according to the changes in the eye / pupil positions of the subject.

[0119] The above are only some embodiments of the present invention and do not impose any formal restrictions on the present invention. The various features / elements / components in the embodiments listed in the present invention can be combined arbitrarily without conflict.

[0120] Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to the above-disclosed technical content within the scope of the technical solution of the present invention to make equivalent embodiments with equivalent changes. However, as long as the content does not depart from the technical solution of the present invention, any simple modification, equivalent change, and modification made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A portable eye tracker stand, characterized in that: include: A support base assembly (21) and a three-joint mechanical arm arranged thereon, which is composed of a large arm assembly (22), a small arm assembly (23) and a wrist assembly (24) connected to an eye tracker. The support base assembly (21), the large arm assembly (22), the small arm assembly (23) and the wrist assembly (24) are hinged in sequence. The rotation axes of the large arm assembly (22), the small arm assembly (23) and the wrist assembly (24) are parallel to each other. The large arm assembly (22), the small arm assembly (23) and the wrist assembly (24) only have the degree of freedom to rotate around their respective rotation axes, and each has a driving device to achieve posture adjustment.

2. The portable eye tracker stand according to claim 1, characterized in that: The support base assembly (21) comprises a fixed support leg portion (2103) and a right side movable support leg (2104) and a left side movable support leg (2106) movably arranged on the support leg portion (2103) and capable of freely extending and retracting along the width direction of the test machine to adapt to the size of the test machine. When one or both of the left side movable support leg (2106) and the right side movable support leg (2104) are moved, the two are opened and closed synchronously and the moving distances are equal.

3. The portable eye tracker stand according to claim 2, characterized in that: The support leg portion (2103) is U-shaped and includes two symmetrically arranged support legs (2112) and a horizontal section (2113) connecting the two support legs (2112).

4. The portable eye tracker stand according to claim 3, characterized in that: The right movable support foot (2104) and the left movable support foot (2106) are both L-shaped. The right movable support foot (2104) has a right support foot vertical section (2123) and a right support foot horizontal section (2124). The left movable support foot (2106) has a left support foot vertical section (2134) and a left support foot horizontal section (2132). The right support foot horizontal section (2124) and the right support foot vertical section (2123) are provided with racks, and the two are meshed through a gear (2105).

5. The portable eye tracker stand according to claim 4, characterized in that: A support foot return spring (2135) is provided between the horizontal section (2132) of the left support foot and the horizontal section (2113) of the support foot portion (2103), so that the right movable support foot (2104) and the left movable support foot (2106) maintain a tendency to move toward each other.

6. The portable eye tracker stand according to claim 5, characterized in that: A foot buffer (2118) is provided on the horizontal section (2113) of the foot portion (2103) and contacts the end surface of the right foot horizontal section (2124) when the right movable foot (2104) and the left movable foot (2106) are reset.

7. The portable eye tracker stand according to claim 4, characterized in that: The right support leg vertical section (2123) and the left support leg vertical section (2134) are both provided with positioning protrusions (2125) for clamping the edge of the laptop computer when the laptop computer is used as a tested machine, and for entering a storage state when the laptop computer is not used as a tested machine.

8. The portable eye tracker stand according to claim 4, characterized in that: The right support leg horizontal section (2124) and the left support leg horizontal section (2132) respectively have a clamping claw extending toward the back side of the screen of the tested machine.

9. The portable eye tracker stand according to claim 2, characterized in that: The support foot part (2103) is connected with a driving device installation part (2102), which is U-shaped, and the two vertical side walls are symmetrically provided with a large arm support bearing (2201). The large arm assembly (22) includes a large arm driving device (2140) and a large arm left rod (2202), a large arm right rod (2213) and a large arm shaping member (2210) which are separately provided; the large arm left rod (2202), the large arm right rod (2213) and the large arm shaping member (2210) are connected to form an H-shaped structure, and the large arm left rod (2202) is provided with a large arm support bearing (2201). A left arm flange (2203) is provided, and a right arm flange (2212) is mounted on a right arm rod (2213). The left arm flange (2203) and the right arm flange (2212) respectively cooperate with the inner rings of the arm support bearings (2201) mounted on the two vertical side walls of the drive device mounting part (2102), so as to support the H-shaped structure to rotate around the bracket base assembly (21). The arm drive device (2140) is fixed on one of the vertical side walls of the drive device mounting part (2102), so as to drive the H-shaped structure to rotate.

10. The portable eye tracker stand according to claim 8, characterized in that: The forearm assembly (23) is driven by a forearm driving device (2139) installed on the vertical side wall on the other side of the driving device mounting part (2102), and rotates around the hinge axis between it and the upper arm assembly (22); the wrist assembly (24) is connected to the wrist driving motor (2302) installed on the forearm assembly (23) through a transmission chain, and the wrist driving motor (2302) drives the wrist assembly (24) to perform pitch motion around the hinge axis between it and the forearm assembly (23).

Images