Child safety seat having a support leg

Abstract

The invention relates to a child safety seat (1) for attaching to a motor vehicle seat, comprising a seat element and at least one support leg (2) for supporting the child safety seat on a base surface, wherein the support leg (2) has at least one upper portion (10) and one lower portion (11) which can be moved relative to one another telescopically in order to extend and shorten the support leg, wherein a locking device (12) is provided which can be brought into a release position and into a locking position and by means of which the support leg (2) can be locked at least with respect to a shortening of the support leg, and wherein an anti-unlocking device (26) is provided which prevents the locking device from unlocking in the event of an impact against a rear side of the support leg.

Description

[0001] Child seat with support leg

[0002] Description

[0003] The invention relates to a child seat for mounting on a motor vehicle seat.

[0004] It is already known in the prior art to equip a child seat with a support leg, as described, for example, in DE 20 2015 104 792 U1. This document shows a support leg by which the child seat can be supported on a surface (in particular, the footwell). This support leg comprises an upper and a lower telescopic section, which can be moved relative to one another to extend and shorten the support leg. A locking device, which can be actuated via an actuating device, is provided to lock the position of the upper and lower telescopic sections relative to one another.

[0005] The object of the invention is to propose a child seat with a support leg in which the length of the support leg can be adjusted safely and reliably.

[0006] Furthermore, it is an object of the invention to propose a corresponding support leg.

[0007] This object is achieved in particular by a child seat according to claim 1.

[0008] In particular, the object is achieved by a child seat for attachment to a motor vehicle seat, comprising a seat element (in particular with a child support unit, e.g., seat shell, and optionally a seat base) and at least one support leg for supporting the child seat on a surface (in particular, a footwell within the vehicle), wherein the support leg has at least one upper (telescopic) section and a lower (telescopic) section, which are displaceable relative to one another (telescopically) to lengthen and shorten the support leg. Furthermore, a locking device (in particular, as a component of the support leg) is provided, which can be moved into a release position and a locking position and by means of which the support leg can be locked, at least with respect to a shortening thereof.Furthermore, an unlocking blocking device is preferably provided, which can counteract unlocking of the locking device (in particular if an impact occurs on the rear side of a support leg), in particular can block (prevent) such unlocking. The unlocking blocking device is preferably movable relative to a main body of the support leg and / or relative to the upper and / or lower section and is configured to interact with a structure impacting the support leg (in particular on a rear side thereof, in particular at least at the level of the locking device and / or at the level of a preferably manual actuating device) in such a way that unlocking of the locking device is blocked (i.e., prevented or at least made more difficult).

[0009] One idea of ​​the invention is that in the event of an impact on the support leg, in particular an impact on the back of the support leg, unlocking of the lock is prevented or at least made more difficult due to the unlocking blocking device. It was recognized that in an accident situation, for example, in the event of a collision with another vehicle from behind or in a frontal collision with an obstacle in front of the vehicle (front crash), a situation may arise in which the back of the support leg strikes a structure at the installation location of the child seat (e.g., the upwardly projecting wall of a bench seat or other motor vehicle seating), such that an impact on the support leg, in particular on the back of the support leg, may occur.This impact can result from the vehicle accelerating (for example, in a rear-end collision), with the child seat, which is held in place by the belt system, initially attempting to remain in its position. Rotations and / or rebound movements of the child seat can also cause such impacts. In such scenarios, the locking mechanism may also be unintentionally released due to inertia and accelerate relative to a main body of the support leg, particularly relative to a locking latch.

[0010] The unlocking blocking device provides a measure that counteracts such release. Considering, for example, Fig. 1 of DE 20 2015 104 792 U1 and assuming an impact on the right side (rear) of the support leg shown in section, this impact could cause the release button located on the front to be moved or accelerated to the right against the spring relative to a main body of the support leg, which could ultimately lead to the locking device being released. The invention counteracts such a risk. Overall, the safety and reliability of the support leg and thus of the entire child seat are improved.

[0011] The child seat can be a child seat for older children (with a backrest section that is structurally separated from a seat section) or, for example, a child seat that is formed by or includes a seat shell (infant seat) in which a seat section and a backrest section are formed by a common shell. Preferably, the child seat is a child seat that has a (separate) seat base that can be removed, if necessary, from a child support unit (for supporting the child), e.g., a seat shell or, if necessary, an infant seat.

[0012] The support leg is (in at least one position) preferably at least 25 cm, more preferably at least 40 cm long and / or preferably extends (in at least one position) by at least 25 cm, preferably at least 40 cm downwards (starting from a lowest point of the seat element, in particular a base thereof) when the seat element is arranged on a horizontal surface.

[0013] The locking device is, in particular, a device that (in principle) prevents shortening of the support leg when the support leg is in a configuration in which it could be shortened (with the locking device released). Preferably, the locking device can also prevent extension when the support leg is in a position in which it could be extended (without the locking device being activated). However, since the support leg rests against the ground during use, it may generally be sufficient to ensure locking with respect to shortening.

[0014] Release of the locking device means, in particular, that the length of the support leg can be extended and / or shortened in this position. A locking position is understood to mean a position in which the length of the support leg cannot be shortened (further) or, if applicable, neither shortened nor extended.

[0015] The impact on the back of the support leg may be an impact from a vertically oriented rigid surface impacting the back of the support leg at a relative speed of at least or exactly 20 km / h, or at least or exactly 40 km / h.

[0016] The term "rear" in relation to the support leg is intended to mean in particular that this is a section which, when the child seat is correctly installed, is directed towards the installation location (in particular the vehicle seat and / or rear seat). Alternatively or additionally, this may be a section which points towards the rear of the vehicle when the child seat is correctly installed (in particular on a forward-facing rear seat). The rear of the support leg is intended to mean in particular a side which is arranged "rear" or points backwards. The information given here is intended to apply in particular to a position of the support leg in which it is supported on the ground.

[0017] In general, the support leg can be pivoted if necessary, for example, for storage, and can be placed against the seat element. This can then be referred to as a storage position.

[0018] In embodiments, the unlocking blocking device can be part of the locking device. Alternatively or additionally, the unlocking blocking device is designed to be movable (in particular rigidly movable) with the locking device. In specific embodiments, the unlocking blocking device (or at least a portion thereof) and the locking device (or at least a portion thereof) can be formed by a common (possibly one-piece, in particular monolithic) component (e.g., a latch, in particular a pin and / or bar). This achieves in a simple manner that blocking, in particular preventing, a movement of the unlocking blocking device also results in an (unintentional) movement of the locking device being prevented or at least made less likely. Security can thus be improved with simple measures.

[0019] Preferably, at least one contact section of the unlocking blocking device is configured to be at least in one position relative to a main body of the support leg (in particular projecting rearward). The position mentioned in the previous sentence preferably corresponds to a release position of the locking device. With such a solution, a structure impacting the support leg from behind drives the unlocking blocking device forward (and / or blocks its rearward movement), so that the unlocking blocking device can, in turn, block unlocking of the locking device, in particular if the latter is configured to be movable, in particular rigid, with the unlocking block.

[0020] If the unlocking blocking device protrudes rearward in at least one position, it can be freely accessible from the outside or covered (for example, by a cover or a possibly elastic membrane). Of particular relevance is that the rearward protrusion is such that the above-described impact from behind causes or can cause the unlocking blocking device to be moved forward, or that its rearward movement is prevented or at least limited from the outset. The impacting structure itself, causing the impact, can then contribute in a simple manner to preventing unintentional release.

[0021] Preferably, a (manual) actuating device, in particular a confirmation button, is provided to actuate the locking device. Alternatively or in addition to an actuating button, an actuating slide and / or an actuating lever can also be used. The (manual) actuating device is preferably arranged on a front side of the support leg and / or at a lower end of the upper section and / or at an upper end of the lower section.

[0022] The unlocking blocking device is preferably configured to prevent the (manual) actuating device from moving to release the lock.

[0023] The locking device can be arranged at a lower end of the upper section and / or at an upper end of the lower section. Alternatively or additionally, the unlocking blocking device can also be arranged at a lower end of the upper section and / or at an upper end of the lower section.

[0024] The (manual) actuating device is preferably arranged opposite the unlocking blocking device (so that the actuating device and the unlocking blocking device are arranged on different sides of the support leg).

[0025] If the (manual) operating device is arranged on the front side of the support leg (i.e. at the front of the support leg), it is clearly visible to the user, which promotes simple and therefore safe adjustment of the sitting leg, especially insofar as it is particularly easy for the user to recognize that an adjustment can (and should) be made here.

[0026] If the (manual) operating device is located on the side of the support leg or even on the back, this is much more difficult to recognize.

[0027] In this context, however, it was recognized that such an arrangement (at the front) is associated with the problems already explained above, namely that the actuating device is accelerated or moved towards the rear relative to the support leg in the event of an impact from behind (particularly if it is spring-loaded), which can lead to unintentional actuation. However, such unintentional actuation is counteracted synergistically by the unlocking blocking device, so that the combination of the arrangement at the front and the unlocking blocking device results in a support leg that is easy and safe to operate. Preferably, the (manual) actuating device is preloaded, in particular by means of a compression and / or tension spring, preferably a compression spring.The actuating device is preferably configured to be actuated, in particular pressed, by the finger of a human hand and preferably has an (accessible) surface of at least 25 mm. 2 and / or a maximum of 10 cm 2 , if necessary, a maximum of 4 cm 2 , on.

[0028] The actuating device is preferably designed to be movable with the locking device (in particular, it is designed to be rigidly movable or rigidly connected to it). Alternatively or additionally, the unlocking blocking device is preferably designed to be movable with the actuating device (in particular, it is designed to be rigidly movable).

[0029] The actuating device and locking device, and if applicable, the unlocking blocking device, can form a common (particularly inherently rigid) assembly and / or be constructed in one piece. Furthermore, the actuating device and the unlocking blocking device, and if applicable, the locking device, can form a common (particularly inherently rigid) assembly and / or be constructed in one piece.

[0030] It is also conceivable that the locking device and the unlocking blocking device are designed to be movable relative to one another, for example in a solution in which a spring acts between the locking device and the unlocking blocking device, so that the unlocking blocking device already projects outwards without external force (and in the locking position of the locking device) and is pushed forwards from the rear in the event of (or by) an impact (for example against a spring load), so that the path of the locking device in the direction of the release position is then blocked.

[0031] In specific embodiments, the locking device and / or the unlocking blocking device can comprise or be formed from a (common) pin and / or a (common) rod and / or a (common) pivot arm. The upper (telescopic) section and the lower (telescopic) section are at least 5 cm long, preferably at least 10 cm long, optionally at least 20 cm long, and / or at most 40 cm long, optionally at most 30 cm long.

[0032] The upper section and / or the lower section can be formed by a tube (or profile, for example a C- or U-profile). The upper section is preferably an outer tube (or outer C- or U-profile). The lower section is preferably an inner tube (or inner profile, in particular a C-profile or U-profile). Conversely, the upper section can also be an inner tube (C- or U-profile) and the lower section an outer tube (or outer profile, in particular a C-profile or U-profile). The upper section can enclose the lower section in an overlapping area, or vice versa (at least partially).

[0033] The child seat, in particular the support leg, preferably has at least one recess, in particular a series of recesses (e.g., formed by an integral or separate recess strip). The recess(es) is / are preferably configured to receive at least one complementary locking structure of the locking device (e.g., a pin, a rod, a projection, or a hook). Alternatively or additionally, the locking device can also have a recess that corresponds to a complementary projection (in particular, a pin, rod, and / or hook). The respective structure (in particular, recess) complementary to the locking device is preferably provided on the upper and / or lower portion of the support leg, according to the embodiment, on the lower portion.

[0034] The support leg can have exactly two (or possibly more) sections that can be telescopically moved relative to each other. At a lower end of the support leg, there can be a foot that is, for example, connected to the lower section (possibly without being movable relative to it) or formed by the lower section.

[0035] The support leg can have a spring. The spring can urge the locking device towards the locking position and / or urge the actuating device against an actuating direction, for example, urging it forward. The locking device is preferably movable in the locking position towards the release position (i.e., not locked). In particular, the locking device (and / or the actuating device) is held in the locking position at least substantially only by a pretensioning force, in particular a spring. The locking device can therefore, in particular, arrest (lock) the upper section relative to the lower section, at least against (further) shortening of the support leg, but is not itself fundamentally prevented from moving.This allows for simple locking, and the resulting risks can be mitigated by the unlocking blocking device.

[0036] According to the embodiment, the seat element comprises a child support unit, in particular a seat shell, and a seat base. The support leg is preferably attached to the seat base (in particular a front end thereof), further preferably pivotably mounted.

[0037] The above-mentioned object is further achieved by a support leg for supporting a child seat (which is configured for attachment to a motor vehicle and comprises a seat element) on a surface, wherein the support leg has at least one upper telescopic section and a lower telescopic section which are displaceable relative to one another for lengthening and shortening the support leg, wherein a locking device is provided which can be brought into a release position and into a locking position and by means of which the support leg can be locked at least with respect to a shortening thereof, wherein an unlocking blocking device is provided which counteracts an unlocking of the locking device when an impact occurs on a rear side of the support leg.

[0038] Further embodiments of the invention emerge from the subclaims.

[0039] In principle (apart from the unlocking blocking device), the support leg can be designed as described in DE 20 2015 104 792 U1. The invention is described below using an exemplary embodiment, which is explained in more detail with reference to the figures. Herein:

[0040] Fig. 1 is a schematic side view of a child seat according to the invention with a motor vehicle seat;

[0041] Fig. 2 the support leg of the child seat according to Fig. 1 in an oblique view;

[0042] Fig. 3 shows a section of the support leg according to Fig. 2;

[0043] Fig. 4 the support leg according to Fig. 2 in a view from behind,

[0044] Fig. 5 shows a section of the support leg according to Fig. 4;

[0045] Fig. 6 the support leg according to Fig. 2 in a different position;

[0046] Fig. 7 shows a section of the support leg according to Fig. 6;

[0047] Fig. 8 the support leg according to Fig. 6 in a view from behind;

[0048] Fig. 9 shows a section of the support leg according to Fig. 8;

[0049] Fig. 10 the support leg according to Fig. 2 in a cross section;

[0050] Fig. 11 shows a section of the support leg according to Fig. 10;

[0051] Fig. 12 the support leg according to Fig. 10 in a different position;

[0052] Fig. 13 shows a section of the support leg according to Fig. 12;

[0053] Fig. 14 a horizontal cross-section through the support leg according to Fig. 2;

[0054] Fig. 15 is an exploded view of components of the support leg according to

[0055] Fig. 2. In the following description, the same reference numbers are used for identical and equivalent parts.

[0056] Fig. 1 shows a child seat 1 according to the invention (mounted on a highly schematically illustrated motor vehicle seat). The child seat 1 can comprise a seat shell 3 (or other child-receiving unit) and optionally a base 4. The child seat further comprises a support leg 2. The support leg 2 can be attached (preferably hinged) to a front end (in particular to an underside) of the base 4 and can extend from the base 4 (or the seat shell 3) toward a vehicle floor (at least in one position, in particular in the position shown in Fig. 1).

[0057] The support leg 2 comprises an upper section 10 and a lower section 11, which are telescopically movable relative to each other. The upper section 10 is closer to the base 4 of the child seat. The lower section 11 is closer to a foot 23 of the support leg. The foot 23 can also be omitted or formed by the lower section itself.

[0058] In this case, the telescopic support leg 2 comprises precisely two sections 10, 11, which are telescopically movable relative to each other. However, it cannot be ruled out that additional (possibly telescopically movable) sections are provided. The lower section 11 can be guided within the upper section 10 (in an overlapping area).

[0059] A locking device 12 (in a housing 14) is provided to lock the upper section 10 relative to the lower section 11.

[0060] 2 and 3 show the locking device 12 from the front. The locking device 12 can be arranged in a housing 14 and can be connected to an actuating element (actuating button) 22. The actuating element 22 is not actuated (or in particular not pressed in) in the position shown in Figs. 2 and 3. The locking device 12 is in the locked position. A length adjustment of the support leg or a telescopic movement between the upper and lower sections 10, 11 of the locking device is not possible in this position (at least no shortening is possible). Figs. 4 and 5 show the locking device 12 in a locked position from the rear. The locking device 12 comprises a locking element (bar) 13 which lies in an opening 19. In this position, the locking element 13 is preferably located completely within the opening 19 or within the housing 14.

[0061] Figs. 6 and 7 show the locking device 12 from the front. The actuating element 22 has been actuated (or pressed in), so that the locking device 12 is in a release position. The length of the support leg 2 (i.e., in particular, the relative position between the upper and lower sections 10, 11) can be adjusted in this position; in particular, it can also be shortened if the support leg is not yet in the shortest possible configuration.

[0062] Figs. 8 and 9 show the locking device 12 of Fig. 4 (when the actuating element is actuated) from the rear. In this position, the locking element 13 is located at least partially outside the opening 19 or outside the housing 14 or protrudes from the housing 14. The protruding part (in this position) forms an unlocking blocking device 26, since it blocks unlocking if a structure strikes this location, i.e., from the rear. This part is an integral part of the locking device in the present case, but can also be designed as a structurally separate part.

[0063] Figs. 10 and 11 show parts of the support leg 2 and the locking device 12 in the locked position in a section from the side. The lower section 11 is preferably guided in the upper section 10.

[0064] A row 17 of recesses 18 is formed on the lower section 11 (for example, in the form of a recess strip). The row 17 of recesses 18 comprises recesses 18 formed one above the other, preferably in a vertical direction. The locking device 12 is preferably fixedly connected to a lower end of the upper section 10.

[0065] The housing 14 can enclose the upper and lower sections 10, 11.

[0066] Preferably, the housing 14 is (fixedly) connected to the upper section 10. A drive element (drive device) 15 can be arranged (attached) in the housing 14 and can be enclosed and optionally guided thereby. The drive element 15 can enclose the upper and lower sections 10, 11 and can move in the housing between a first position (locking position of the locking device 12) and a second position (release position of the locking device 12). The housing 14 preferably comprises a cavity 25 that can allow movement of the drive element between the first and second positions. The drive element 15 can be connected at the first end to the actuating element 22, which can be guided in an actuating guide 21.

[0067] The actuating element 22 can be at least partially flush with an outer surface of the housing 14 (possibly covered by a cover and / or elastic, possibly transparent, membrane) in order to be accessible to a user.

[0068] A spring 20 can be supported at its first end on the upper section 10 and at its second end on the actuating element 22 and can thus force the drive element 15 into the locking position.

[0069] The drive element 15 can be connected at its other end to the locking element 13, which comprises a front end 13b and a rear end 13a (contact section). The front end 13b can be mounted in the locking holder 16 of the drive element 15 and can thus be connected thereto. The rear end 13a of the locking element 13 (as well as a locking holder 16) can lie in the opening 19 of the housing and can be guided thereby. The front end 13b can be guided through a connecting hole 24 in the upper section and, in the locked position, can engage in one of the recesses 18 of the recess strip 17.

[0070] The drive element 15 (together with the actuating element 22 and the locking element 13) can move through the cavity 25 of the housing 14 from a locking position to a release position (upon actuation of the actuating element 22). The foot 23 can be fixedly connected to the lower section 11 at a lower end thereof. Figs. 12 and 13 show parts of the support leg 2 in the release position in a vertical section. The actuating element 22 has been actuated, thus moving the drive element 15 through the cavity 25 of the housing 14 from the first to the second position (or from the locking position to the release position). The locking element 13 has also been moved from the first to the second position, so that a front end 13b no longer engages in one of the recesses 13 of the row of recesses 17 and its rear end 13a (as well as the locking holder 16) protrudes from the opening 19 or the housing 14.

[0071] Fig. 14 shows parts of the support leg 2 in the locked position of the locking device in a horizontal section. The lower section 11 is guided in the upper section 10. The drive element 15 can enclose the upper and lower sections 10, 11. The housing 14 can in turn enclose the drive element 15 and thus also the upper and lower sections 10, 11. Furthermore, the housing 14 can comprise the cavity 25 in which the drive element 15 can move between the locking and release positions. The drive element 15 can be connected at a first end to the actuating element 22, which is guided in an actuating guide 21 and can be at least partially flush with an outer surface of the housing 14. The spring 20 can be supported at one end on the upper section 10 and at another end on the actuating element 22 and can thus force the drive element 15 into the locked position.The rear end 13a can be mounted in the locking bracket 16 of the drive element 15 and can be located in the opening 19 of the housing 14. The front end 13b can be guided through a connecting hole 24 in the upper section and can engage in a recess 18.

[0072] Fig. 15 shows the area around the locking device 12 in an exploded view.

[0073] At this point, it should be noted that all parts described above, viewed individually and in any combination, particularly the details shown in the drawings, are claimed as essential to the invention. Modifications to these provisions will be familiar to those skilled in the art. Furthermore, it is pointed out that the broadest possible scope of protection is sought. Therefore, the disclosure contained in the claims may also be further clarified by features that are described with additional features (even without these additional features necessarily being included). It is explicitly pointed out that parentheses and the term "in particular" are intended to emphasize the optionality of features in the respective context (which does not imply, conversely, that without such identification, a feature is to be considered mandatory in the corresponding context).The term "element / elements" is preferably intended to designate a coherent structure, which in turn may be connected to at least one other structure (to form a possibly integral and / or inherently immobile overall structure) or may be separated from all other structures.

[0074] Reference symbol

[0075] 1 child seat

[0076] 2 support legs

[0077] 3 seat shell

[0078] 4 Base

[0079] 10 upper section

[0080] 11 lower section

[0081] 12 Locking device

[0082] 13 Locking element (bolt)

[0083] 13a rear end (plant section)

[0084] 13b front end

[0085] 14 housings

[0086] 15 Drive element (drive device)

[0087] 16 Locking bracket

[0088] 17 Recess strip

[0089] 18 recesses

[0090] 19 Opening

[0091] 20 springs

[0092] 21 Actuating guide

[0093] 22 Actuating element (actuating button)

[0094] 23 feet

[0095] 24 Connection hole 25 Cavity

[0096] 26 Unlocking blocking device

Claims

Child seat with support leg Claims 1. A child seat (1) for attachment to a motor vehicle seat, comprising a seat element and at least one support leg (2) for supporting the child seat on a surface, wherein the support leg (2) has at least an upper section (10) and a lower section (11) which are telescopically displaceable relative to one another for lengthening and shortening the support leg, wherein a locking device (12) is provided which can be brought into a release position and into a locking position and by means of which the support leg (2) can be locked at least with respect to a shortening thereof, wherein an unlocking blocking device (26) is provided which counteracts an unlocking of the locking device if an impact occurs on a rear side of the support leg.

2. Child seat (1) according to claim 1, characterized in that the unlocking blocking device (26) is part of the locking device (12) and / or is designed to be movable therewith.

3. Child seat (1) according to claim 1 or 2, characterized in that at least one contact section of the unlocking blocking device (26) projects rearwardly at least in one position relative to a main body of the support leg, wherein the position preferably corresponds to a release position of the locking device.

4. Child seat (1) according to one of the preceding claims, characterized in that a (manual) actuating device (22), in particular an actuating button, is provided, which is preferably arranged on a front side of the support leg and / or at a lower end of the upper section and / or at an upper end of the lower section and / or opposite the unlocking blocking device, wherein the locking device (12) and / or the unlocking blocking device (26) are preferably designed to be movable with the actuating device (22) and / or form a common assembly with the latter and / or are designed in one piece with the latter.

5. Child seat (1) according to one of the preceding claims, characterized in that the locking device and / or the unlocking blocking device (26) comprises or is formed from a pin and / or a rod and / or a pivot arm.

6. Child seat (1) according to one of the preceding claims, characterized in that the upper and / or lower section is / are at least 5 cm, preferably at least 10 cm, optionally at least 20 cm, and / or at most 40 cm, optionally at most 30 cm long.

7. Child seat (1) according to one of the preceding claims, characterized in that at least one recess (18), in particular a series of recesses (18), is / are provided, specifically for receiving at least one complementary locking structure of the locking device (12).

8. Child seat (1) according to one of the preceding claims, characterized in that a spring (20) is provided which urges the locking device (12) towards the locking position.

9. Child seat (1) according to one of the preceding claims, characterized in that the locking device (12) is movable in the locking position in the direction of the release position, in particular is held in the locking position at least substantially only by a pretensioning force, in particular a spring (20).

10. Child seat (1) according to one of the preceding claims, characterized in that the seat element comprises a child receiving unit, in particular a seat shell, and a seat base, wherein the support leg (2) is preferably attached to the seat base.

11. Child seat (1) according to one of the preceding claims, characterized in that the actuating device and locking device (12) are connected to one another via a drive device (15), wherein the drive device is preferably guided past the upper or lower section at least on one side, preferably on both sides from front to rear.

12. Support leg (2) for supporting a child seat for attachment to a motor vehicle seat, comprising a seat element, on a base, wherein the support leg (2) has at least one upper telescopic section (10) and a lower telescopic section (11), which are displaceable relative to one another for lengthening and shortening the support leg, wherein a locking device is provided which can be brought into a release position and into a locking position and by means of which the support leg (2) can be locked at least with respect to a shortening thereof, wherein an unlocking blocking device (26) is provided which Counteracts unlocking of the locking device (12) when an impact occurs on the back of the support leg.

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