Telescopic rod piece and sitting posture corrector

Abstract

A telescopic rod piece comprises at least three sections of sub rod pieces, and the sub rod pieces are sequentially connected into another sub rod piece in a sleeved mode in a position-adjustable mode. The first positioning assembly is connected with the first sub-rod and is suitable for controlling the length of the second sub-rod connected into the first sub-rod; and the second positioning assemblies are connected with the Nth sub-rod and are suitable for controlling the length of the part, connected into the Nth sub-rod, of the (N + 1) th sub-rod piece. According to the telescopic rod piece, the length of the part, entering the first sub-rod, of the second sub-rod is controlled through the first positioning assembly, the length positions of the other sub-rod pieces are controlled through at least one set of second positioning assembly, and the length of the whole telescopic rod piece is kept. The utility model further provides a sitting posture corrector, sitting posture limiting adapting to the height of a user is formed in front of the chest of the user through the telescopic rod piece, bad postures such as head lowering and humpback are reduced, and therefore damage to vision and cervical vertebra is reduced, and the probability of myopia, humpback and spinal curvature is reduced.

Description

Technical Field

[0001] The utility model relates to the field of sitting posture correction aids, and particularly relates to a telescopic rod member and a sitting posture corrector. Background Art

[0002] Most of the existing telescopic rods are formed by nesting and assembling multiple sub-rods through a tight-fitting installation method. Since there is no component for fixing the telescopic degree, the sub-rods are prone to sliding under the action of external force, thus changing the overall length of the telescopic rod, which brings certain inconvenience in use.

[0003] A sitting posture corrector is an auxiliary tool for correcting sitting postures. Usually, a rod member or a chest pressing member is arranged in front of the user to form a physical limit and restrict the user from leaning forward in the sitting posture. However, due to the differences in the heights of users, the current sitting posture corrector cannot well adapt to users of different heights.

[0004] Therefore, it is necessary to provide a telescopic rod member and a sitting posture corrector that can fix the telescopic degree. Summary of the Invention

[0005] To achieve the above object, the utility model provides the following technical solutions:

[0006] A telescopic rod member includes at least three sub-rods 1, and the sub-rods 1 are sequentially and adjustably sleeved in another sub-rod 1 to form a rod with a telescopic length. The outermost sub-rod 1 is the first sub-rod 11, and the sub-rods starting from the second section of the first sub-rod 11 are the Nth sub-rods in sequence, where N is greater than or equal to 2; it further includes a set of first positioning components 2 connected to the first sub-rod 11 and adapted to control the length of the second sub-rod inserted into the first sub-rod 11; at least one set of second positioning components 3 connected to the Nth sub-rod and adapted to control the length of the (N + 1)th sub-rod inserted into the Nth sub-rod.

[0007] Further, the second positioning component 3 can be received into the (N - 1)th sub-rod together with the Nth sub-rod.

[0008] Further, the second positioning component 3 includes a second positioning member 31, a second positioning portion 32, and a second reset member 33; the second positioning member 31 is movably connected to the Nth sub-rod; the second positioning portion 32 is arranged on the (N + 1)th sub-rod; one end of the second positioning member 31 passes through the Nth sub-rod and is in snap-fit connection with the second positioning portion 32, and the second reset member 33 is adapted to keep the second positioning member 31 and the second positioning portion 32 in snap-fit connection.

[0009] Further, the second positioning component 3 further includes a limit guiding portion 111; the limit guiding portion 111 is disposed on the inner wall of the (N - 1)th sub-bar, and is adapted to release the clamping connection between the second positioning member 31 and the second positioning portion 32 when the Nth sub-bar approaches the (N - 1)th sub-bar.

[0010] Further, the second positioning portion 32 is a plurality of second positioning teeth; the middle of the second positioning member 31 is hinged to the Nth sub-bar, an unlocking guiding surface 312 is disposed on the outer side of the second positioning member 31, a second tooth engaging portion 311 is disposed at one end of the inner side of the second positioning member 31, and the other end is connected to the second restoring member 33; or the second positioning member 31 is slidably connected to the Nth sub-bar along a direction perpendicular to the Nth sub-bar, a guiding groove or a guiding block is disposed on the second positioning member 31, and a second tooth engaging portion 311 is disposed at one end of the second positioning member 31 close to the Nth sub-bar.

[0011] Further, the first positioning component 2 includes a first positioning member 21 movably connected to the first sub-bar 11; a first positioning portion 22 disposed on the sub-bar 1 closest to the first sub-bar 11, one end of the first positioning member 21 passes through the first sub-bar 11 and is in clamping cooperation with the first positioning portion 22; a first restoring member 23 adapted to keep the first positioning member 21 and the first positioning portion 22 in clamping connection.

[0012] Further, the first positioning portion 22 is a plurality of first positioning teeth; the middle of the first positioning member 21 is hinged to the first sub-bar 11, a first tooth engaging portion 211 is disposed at one end of the inner side of the second positioning member 31, and the other end is connected to the first restoring member 23.

[0013] Further, an anti-pulling-off portion 12 is disposed at one end of the Nth sub-bar close to the first sub-bar 11, and is adapted to limit the Nth sub-bar from detaching from the (N - 1)th sub-bar.

[0014] The present invention also provides a sitting posture corrector, including a mounting member 20 adapted to mount the sitting posture corrector on the table edge or the tabletop for use; and the telescopic rod member 10 as described in any one of the above, a first external connection portion 13 is disposed on the first sub-bar 11, a mounting portion is disposed on the mounting member 20, and in cooperation with the first external connection portion 13, the telescopic rod member forms a sitting posture limit in front of the user's chest.

[0015] Further, it further includes a chest pressing member 30; a second external connection portion 14 is disposed on the sub-bar 1 farthest from the first sub-bar 11, at one end away from the first external connection portion 13; the chest pressing member 30 is connected to the second external connection portion 14.

[0016] The telescopic rod member of the present utility model controls the length of the second sub-rod entering the first sub-rod by setting a first positioning component, and controls the length positions of the remaining sub-rod members through at least one group of second positioning components, so as to keep the length of the entire telescopic rod member. Further, a sitting posture corrector is provided, which forms a sitting posture limit adapted to the user's height in front of the user through the above-mentioned telescopic rod member, reduces bad postures such as lowering the head and hunching the back, thereby reducing the damage to vision and cervical vertebrae, and reducing the probability of myopia, hunchback and spinal curvature. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention, and those of ordinary skill in the art can also obtain other drawings based on these drawings without creative efforts.

[0018] Figure 1 FIG. 9 is a schematic structural diagram of a telescopic rod member in an extended state according to Embodiment 1 of the present utility model.

[0019] Figure 2 is Figure 1 a schematic structural diagram of another perspective of the structure.

[0020] Figure 3 is Figure 1 a schematic cross-sectional diagram of the structure.

[0021] Figure 4 FIG. 25 is a schematic cross-sectional structure diagram of the telescopic rod member at a certain moment during the transition from the extended state to the contracted state.

[0022] Figure 5 FIG. 29 is a schematic cross-sectional structure diagram when the second sub-rod is retracted into the first sub-rod to the maximum extent.

[0023] Figure 6 FIG. 33 is a schematic structural diagram of the telescopic rod member in the contracted state according to Embodiment 1.

[0024] Figure 7 FIG. 37 is a schematic structural diagram of a sitting posture corrector in one of the use states provided by Embodiment 1.

[0025] Figure 8 is Figure 7 a schematic structural diagram of another use state of the sitting posture corrector.

[0026] Description of the reference numerals:

[0027] 1. Sub-rod member; 11. First sub-rod; 12. Anti-pulling-off part; 13. First external connection part; 14. Second external connection part; 111. Limit guiding part;

[0028] 2. First positioning component; 21. First positioning member; 22. First positioning portion; 23. First reset member; 211. First tooth engaging portion;

[0029] 3. Second positioning component; 31. Second positioning member; 32. Second positioning portion; 33. Second reset member; 311. Second tooth engaging portion; 312. Unlocking guide surface;

[0030] 10. Telescopic rod member; 20. Mounting member; 30. Chest pressing member. Detailed implementation manners

[0031] In order to make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments and the accompanying drawings. It should be noted that the embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as a limitation to the present invention.

[0032] For example, terms such as "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature; the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0033] Terms such as "mount", "connect", "couple", "fix", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and may be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly defined.

[0034] As the orientation or positional relationship indicated by terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, it is only for the convenience of describing the technical solution of the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. For example, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium; the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply indicates that the first feature has a higher horizontal height than the second feature; the first feature being "below", "beneath" and "underneath" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply indicates that the first feature has a lower horizontal height than the second feature.

[0035] The following describes the specific embodiments of the present utility model with reference to the accompanying drawings.

[0036] Embodiment 1

[0037] As Figures 1-6 shown, a preferred embodiment of a telescopic rod member 10 provided by the present invention includes at least three sub-rod members 1. The sub-rod members 1 are sequentially sleeved in another sub-rod member 1, and the sub-rod members 1 are adjustably sleeved in another sub-rod member 1, thereby forming a rod member with a variable telescopic length. The outermost sub-rod member 1 is the first sub-rod 11, and starting from the second sub-rod of the first sub-rod 11, they are sequentially named the Nth sub-rod, where N is greater than or equal to 2; it further includes a set of first positioning components 2 connected to the first sub-rod 11 and adapted to control the length of the second sub-rod inserted into the first sub-rod 11; at least one set of second positioning components 3 connected to the Nth sub-rod and adapted to control the length of the (N + 1)th sub-rod member 1 inserted into the Nth sub-rod.

[0038] Specifically, in this embodiment, three sub-members 1 are provided. The first sub-member 11 is sleeved outside the second sub-member, and the second sub-member is sleeved outside the third sub-member, so that the length of the third sub-member inserted into the second sub-member can be adjusted, and the length of the second sub-member inserted into the first sub-member 11 can be adjusted; further, the length of the second sub-member inserted into the first sub-member 11 is fixed by the first positioning component 2, and the length of the third sub-member entering the second sub-member is fixed by the second positioning component 3. In some other embodiments, more than three sub-members 1 are provided. The first positioning component 2 is provided on the first sub-member 11 to control the inserted length of the second sub-member. The second positioning components 3 are respectively provided on the second sub-member to the second-to-last sub-member 1 to respectively control the inserted length of the next sub-member 1. For example, when four sub-members 1 are provided, the first positioning component 2 is provided on the first sub-member 11, and the second positioning components 3 are provided on both the second sub-member and the third sub-member. The second positioning component 3 on the second sub-member is used to control the length of the third sub-member inserted into the second sub-member, and the second positioning component 3 on the third sub-member is used to control the length of the fourth sub-member inserted into the third sub-member; another example is an expansion member 10 with five sub-members 1. Similarly, the first positioning component 2 is provided on the first sub-member 11, and the second positioning components 3 are provided on the second to fourth sub-members, and so on.

[0039] The first positioning component 2 and the second positioning component 3 can be set with the same structure or different structures. In this embodiment, it is preferred that the structures of the first positioning component 2 and the second positioning component 3 are basically the same, and both are a combination of a lever-type positioning member and a positioning groove engaging structure.

[0040] In this embodiment, preferably, the first positioning component 2 is provided on the side close to the user, and the second positioning component 3 is provided on the side far from the user.

[0041] Further, the second positioning component 3 can be retracted into the (N - 1)-th sub-member 1 together with the N-th sub-member, so that when the expansion member 10 is in the retracted state, less space resources are occupied. In this solution, the second positioning component 3 can be retracted into the next sub-member 1. Another purpose is to cooperate with the limit guiding portion 111 preset on the inner wall of the next sub-member 1 to release the locking function of the second positioning component 3. For example, in this embodiment, when the second positioning component 3 is retracted into the first sub-member 11, the limit guiding portion 111 on the inner wall of the first sub-member 11 releases the limitation on the length of the third sub-member inserted into the second sub-member by the second positioning component 3.

[0042] To reduce interference, at least a part of the second positioning component 3 is always located in the opening at the end of the (N - 1)-th sub-member 1. For example, in this embodiment, the lower end of the second positioning member 31 of the second positioning component 3 is always located in the opening of the first sub-member 11, whether the expansion member 10 is in the fully extended state or the fully retracted state.

[0043] The second positioning assembly 3 includes a second positioning member 31, a second positioning portion 32 and a second reset member 33; the second positioning member 31 is movably connected to the Nth sub-bar; the second positioning portion 32 is provided on the (N + 1)th sub-bar member 1; one end of the second positioning member 31 passes through the Nth sub-bar and is in snap-fit connection with the second positioning portion 32, and the second reset member 33 is adapted to keep the second positioning member 31 and the second positioning portion 32 in snap-fit connection. By overcoming the potential energy of the second reset member 33 with an external force, the snap-fit connection between the second positioning member 31 and the second positioning portion 32 can be released, and thus the length of the telescopic rod member 10 can be adjusted.

[0044] Further, the second positioning assembly 3 further includes a limit guiding portion 111; the limit guiding portion 111 is provided on the inner wall of the (N - 1)th sub-bar member 1 and is adapted to release the snap-fit connection between the second positioning member 31 and the second positioning portion 32 when the Nth sub-bar approaches the (N - 1)th sub-bar member 1. In this embodiment, the limit guiding portion 111 is a raised rib provided on the inner wall of the first sub-bar 11, and the height of the raised rib gradually increases in the direction away from the second sub-bar.

[0045] The second positioning portion 32 is a plurality of second positioning teeth, which are preferably one-way teeth in this embodiment, and the tooth openings are inclined downward, which is convenient for directly stretching the telescopic rod member 10 upward to adjust the length.

[0046] The middle part of the second positioning member 31 is hinged to the outer wall of the Nth sub-bar. An unlocking guide surface 312 and a top surface are provided on the outside of the second positioning member 31, a second engaging tooth portion 311 is provided at one end on the inner side of the second positioning member 31, and the other end is connected to the second reset member 33.

[0047] In this embodiment, a strip-shaped groove for accommodating and installing the second positioning member 31 is formed in the outer wall of the second sub-bar, and the middle part of the second positioning member 31 is hinged in the strip-shaped groove; the inner side of the second positioning member 31 is the side close to the second sub-bar, and the unlocking guide surface 312 is an inclined surface provided on the outside of the second positioning member 31; the second reset member 33 is a compression spring, and the two ends respectively abut against the outer wall of the second sub-bar and one end of the second positioning member 31 away from the second engaging tooth portion 311; the second positioning portions 32 are arranged on the outer wall of the third sub-bar; the second engaging tooth portion 311 can pass through a hole preset in the second sub-bar and be in snap-fit connection with the second positioning teeth, so as to lock the length of the third sub-bar inserted into the second sub-bar.

[0048] During the process of the second positioning member 31 contracting with the second sub-bar into the first sub-bar 11, the unlocking guide surface 312 on the second positioning member 31 cooperates with the limit guiding portion 111, so that the second positioning member 31 overcomes the elastic force of the second reset member 33, and the second positioning teeth are separated from the second engaging tooth portion 311, thereby releasing the restriction on the third sub-bar.

[0049] The first positioning component 2 includes a first positioning member 21 movably connected to the first sub-bar 11; a first positioning portion 22 provided on the sub-bar member 1 closest to the first sub-bar 11, one end of the first positioning member 21 passing through the first sub-bar 11 and being snap-fitted with the first positioning portion 22; and a first reset member 23 adapted to keep the first positioning member 21 and the first positioning portion 22 in snap connection. By overcoming the potential energy of the second reset member 33 with an external force, the snap connection between the first positioning member 21 and the first positioning portion 22 can be released, thereby adjusting the length of the telescopic rod member 10.

[0050] The first positioning portion 22 is a plurality of first positioning teeth; preferably a one-way tooth in this embodiment, with the tooth opening inclined downward, facilitating directly upward stretching of the telescopic rod member 10 to adjust the length.

[0051] The middle of the first positioning member 21 is hinged to the first sub-bar 11. A first tooth engaging portion 211 is provided at the inner end of the second positioning member 31, and the other end is connected to the first reset member 23. In this embodiment, the first positioning member 21 is hinged to the outer wall of the first sub-bar 11; the first reset member 23 is a compression spring, with both ends respectively abutted against the outer wall of the first sub-bar 11 and the end of the first positioning member 21 away from the first tooth engaging portion 211; the first positioning portion 22 is arranged on the outer wall of the second sub-bar; the first tooth engaging portion 211 can pass through the hole preset in the first sub-bar 11 and be snap-fitted with the first positioning teeth, thereby locking the length of the second sub-bar inserted into the first sub-bar 11.

[0052] Further, anti-pulling-off portions 12 are provided at the ends of the Nth sub-bar close to the first sub-bar 11, adapted to limit the Nth sub-bar from detaching from the (N - 1)th sub-bar member 1. For example, a limiting edge can be provided at the upper port of the (N - 1)th sub-bar member 1 and a protruding edge can be provided at the lower end of the Nth sub-bar, and the two cooperate to achieve anti-pulling-off and limiting; or for example, a sliding groove can be provided on the inner wall of the (N - 1)th sub-bar member 1, cooperating with a protruding block provided at the lower end of the Nth sub-bar to achieve anti-pulling-off and limiting; or, as in this embodiment, anti-pulling-off is achieved through the cooperation of the anti-pulling-off portion 12 with the first positioning component 2 or the second positioning component 3. Specifically, the anti-pulling-off portion 12 is a groove provided on the Nth sub-bar, and the groove wall cooperates with the end of the first positioning member 21 having the first tooth engaging portion 211 or the end of the second positioning member 31 having the second tooth engaging portion 311 to form an anti-pulling-off and limiting structure.

[0053] To facilitate the application of the telescopic rod member 10 to other external structures, according to actual situations, structures for connecting to the outside can be respectively provided on the first sub-bar 11 and / or the last but one sub-bar member 1, such as mounting platforms, or mounting grooves, or mounting holes; in this embodiment, a first external connection portion 13 is provided on the first sub-bar 11, and a second external connection portion 14 is provided on the third sub-bar.

[0054] Please refer to Figure 7 、 8, this embodiment also provides a sitting posture corrector, which includes a mounting member 20 adapted to mount the sitting posture corrector on the edge or surface of a table for use; and the above-mentioned telescopic rod member 10. A first external connection portion 13 is provided on the first sub-rod 11, and a mounting portion is provided on the mounting member 20. In cooperation with the first external connection portion 13, the telescopic rod member 10 forms a sitting posture limit in front of the user's chest.

[0055] The function of the mounting member 20 is to mount the sitting posture corrector on a study table for use, and it is only necessary to preset a mounting portion on the mounting member 20 that matches the shape of the first external connection portion 13. For example, the mounting member 20 is a clamp seat fixed to the edge of the table by a clamping method, or for example, the mounting member 20 is a suction cup seat fixed to the tabletop by an adsorption method. Or, as in this embodiment, the mounting member 20 is a tabletop backing plate that is mounted in contact with the tabletop through a reference plane, so that the sitting posture corrector can be directly placed on the tabletop for use. In this embodiment, the first external connection portion 13 is a flat connecting block provided on the outer side wall of the first sub-rod 11, and the mounting portion is a mounting groove preset in the tabletop backing plate, which is provided on the end wall of the tabletop backing plate facing the user, so that the assembled telescopic rod member 10 can form a physical limit in front of the user's chest.

[0056] Furthermore, to optimize the use experience, it further includes a chest pressing member 30. Preferably, a soft pad is laid on the side of the chest pressing member 30 facing the user; a second external connection portion 14 is provided on the sub-rod member 1 farthest from the first sub-rod 11, located at one end away from the first external connection portion 13; the chest pressing member 30 is connected to the second external connection portion 14.

[0057] Working principle:

[0058] Taking the example of this embodiment having three sub-rod members 1, the process from the extended state to the contracted state:

[0059] 1. Press the unlocking end of the first positioning member 21 to squeeze the first reset member 23. At the same time, due to the lever effect, the first tooth engaging portion 211 at the other end of the first positioning member 21 disengages from the first positioning tooth outward, releasing the telescopic lock between the first sub-rod 11 and the second sub-rod;

[0060] 2. Press down the third sub-rod or the chest pressing member 30, and the second sub-rod will descend accordingly and contract more into the first sub-rod 11;

[0061] 3. As the second sub-rod descends, the limit guiding portion 111 on the inner wall of the first sub-rod 11 will gradually squeeze the unlocking guide surface 312 of the second positioning member 31, causing the second positioning member 31 to squeeze the second reset member 33. Similarly, due to the lever effect, the second tooth engaging portion 311 at the other end will disengage from the second positioning tooth outward, thereby automatically releasing the telescopic lock between the first sub-rod 11 and the second sub-rod;

[0062] 4. The conversion of the contracted state is completed.

[0063] The process from the contracted state to the extended state is the reverse process of the above steps and will not be elaborated here.

[0064] Embodiment 2

[0065] As a variation of the above embodiment, the movable connection of the above second positioning member is replaced from a hinge connection to a sliding connection, so that the second positioning member forms a self-locking structure similar to a reciprocating switch in the setting of the second sub-bar.

[0066] Specifically, the second positioning member is slidably connected to the Nth sub-bar in a direction perpendicular to the Nth sub-bar. A guide groove or a guide block is provided on the second positioning member, and a second tooth engaging portion is provided at one end of the second positioning member close to the Nth sub-bar. Correspondingly, a guide rail or a guide groove is provided on the inner wall of the Nth sub-bar; the second reset member is a tension spring, and both ends are respectively connected to the second positioning member and the Nth sub-bar.

[0067] In this embodiment, through the combined action of the guide groove and the guide rail, or the guide block and the guide groove, when the second sub-bar moves towards the first sub-bar, the second positioning member is guided to move in a direction away from the second sub-bar. While overcoming the pulling force of the second reset member, the second tooth engaging portion is disengaged from the second positioning tooth.

[0068] Embodiment 3

[0069] As a variation of the above embodiment, the above button-lock type first positioning assembly and second positioning assembly are replaced with a lever-lock type buckle.

[0070] Specifically, a notch is provided at the upper opening of each sub-bar to provide a certain deformation space; a lever is rotatably provided at the notch. The hinged end of the lever has an eccentric ball head. Through the protrusion of the ball head, the upper opening of the sub-bar is tightened or loosened, so as to lock the relative position between the sub-bars and fix the length of the telescopic member.

[0071] The telescopic member of the present utility model controls the length of the second sub-bar entering the first sub-bar by setting the first positioning assembly, and controls the length position of the remaining sub-bars through at least one group of second positioning assemblies, so that the length of the entire telescopic member can be maintained. Further, a sitting posture corrector is provided, which forms a sitting posture limit adapted to the user's height in front of the user through the above telescopic member, reduces bad postures such as lowering the head and hunching the back, enables the user to more easily maintain a comfortable and healthy good sitting posture for a long time, thereby reducing the damage to vision and cervical vertebrae, and reducing the probability of myopia, hunchback and spinal curvature.

[0072] The above embodiments only represent a part of the implementation manners of the present invention. Without departing from the inventive concept of the present invention, several deformations, substitutions and improvements made by those skilled in the art without creative labor all fall within the protection scope of the present invention.

Claims

1. A telescopic rod, comprising at least three sections of sub-rods (1), wherein the sub-rods (1) are sequentially and position-adjustably sleeved into another sub-rod (1), thereby forming a rod with a telescopic length, wherein the sub-rod (1) located at the outermost side is the first sub-rod (11), and the Nth sub-rods are sequentially arranged from the second section of the first sub-rod (11), where N is greater than or equal to 2; characterized in that: It also comprises a set of first positioning components (2), connected to the first sub-rod (11), and suitable for controlling the length of the second sub-rod connected to the first sub-rod (11); At least one set of second positioning components (3), connected to the Nth sub-rod, and adapted to control the length of the N+1th sub-rod connected to the Nth sub-rod; The second positioning assembly (3) comprises a second positioning member (31), a second positioning portion (32), and a second resetting member (33); The second positioning member (31) is movably connected to the Nth sub-rod; The second positioning portion (32) is arranged on the N+1th sub-rod; One end of the second positioning member (31) passes through the Nth sub-rod and is engaged with the second positioning portion (32), and the second resetting member (33) is suitable for keeping the second positioning member (31) engaged with the second positioning portion (32); The second positioning assembly (3) further comprises a limiting guide portion (111); The position limiting guide portion (111) is arranged on the N-1th sub-rod and is suitable for releasing the clamping connection between the second positioning member (31) and the second positioning portion (32) when the N-1th sub-rod approaches the N-1th sub-rod.

2. The telescopic rod according to claim 1, characterized in that: The second positioning assembly (3) can be stored in the N-1th sub-rod along with the Nth sub-rod.

3. The telescopic rod according to claim 1 or 2, characterized in that: The position limiting guide portion (111) is arranged on the inner wall of the N-1th sub-rod.

4. The telescopic rod according to claim 3, characterized in that: The second positioning portion (32) is a plurality of second positioning teeth; The middle part of the second positioning member (31) is hinged to the Nth sub-rod, an unlocking guide surface (312) is provided on the outer side of the second positioning member (31), a second latching tooth portion (311) is provided at one end of the inner side of the second positioning member (31), and the other end is connected to the second reset member (33); or the second positioning member (31) is slidably connected to the Nth sub-rod in a direction perpendicular to the Nth sub-rod, a guide groove or a guide block is provided on the second positioning member (31), and a second latching tooth portion (311) is provided at one end of the second positioning member (31) close to the Nth sub-rod.

5. The telescopic rod according to claim 4, characterized in that: The first positioning assembly (2) comprises a first positioning member (21) movably connected to the first sub-rod (11); A first positioning portion (22) is provided on the sub-rod (1) closest to the first sub-rod (11); one end of the first positioning portion (21) passes through the first sub-rod (11) and is engaged with the first positioning portion (22); The first restoring member (23) is suitable for maintaining the first positioning member (21) in engagement with the first positioning portion (22).

6. The telescopic rod according to claim 5, characterized in that: The first positioning portion (22) is a plurality of first positioning teeth; The middle part of the first positioning member (21) is hinged to the first sub-rod (11), and a first latching tooth portion (211) is provided at one end inside the second positioning member (31), and the other end is connected to the first resetting member (23).

7. The telescopic rod according to any one of claims 1, 2, 4-6, characterized in that: An anti-pull-off portion (12) is provided at one end of the Nth sub-rod close to the first sub-rod (11), suitable for limiting the Nth sub-rod from being separated from the N-1th sub-rod.

8. A sitting posture corrector, comprising a mounting member (20), suitable for mounting the sitting posture corrector on a table edge or a table top for use; characterized in that: It also comprises the telescopic rod (10) as claimed in any one of claims 1 to 7, The first sub-rod (11) is provided with a first external connection portion (13), and the mounting member (20) is provided with a mounting portion, which cooperates with the first external connection portion (13) so that the telescopic rod forms a sitting position limiter in front of the user's chest.

9. The sitting posture corrector according to claim 8, characterized in that: Also includes a chest top member (30); A second external connection portion (14) is provided on the sub-rod (1) farthest from the first sub-rod (11), and is located at an end farthest from the first external connection portion (13); The top chest piece (30) is connected to the second external connection portion (14).

Images