JPH024317Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Field of industrial application The present invention relates to an elevating device for use in electric fans, bonnet dryers, etc., and a support rod that supports the main body of the device so that it can be raised and lowered.

(b) Conventional technology The technology that precedes this invention is
Publication No. 27639, Utility Model Publication No. 10231, Utility Model Publication No. 10231, Utility Model Publication No. 10231
- As shown in Publication No. 18438, etc., a support rod supported by a hollow column so as to be able to rise and fall is surrounded by a ring-shaped locking body within the hollow column, and the locking body is made rotatable or slidable. It engaged with the support rod and prevented it from rising. However, the force of the support rod trying to rise was received only at the part where it engaged with the locking body, and when a large force was applied, the engaging part slipped and the engagement came off in the former two publications. The support rod may be scratched, and in the latter publication, the engaging portion may be damaged.

Furthermore, since the locking body is ring-shaped, it is necessary to form a storage space for the locking body around the entire circumference of the support rod and the hollow column. Japanese Utility Model Publication No. 45-15588 discloses a support rod lifting device that can reduce the storage space, but it does not automatically shift from a disengaged state to an engaged state as in the above-mentioned publications; It was inconvenient to use because it required an operation each time it was engaged.

(c) Problems to be solved by the invention The present invention is capable of reliably holding the hollow column and the support rod in a locked state without damaging the support rod lifting device even when force is applied to the support rod lifting device. Furthermore, the present invention provides a support rod lifting device that can simplify and downsize the structure by reducing the storage space for the locking body.

(d) Means for Solving the Problems The present invention includes an equipment frame formed with a hollow support, a support rod that is supported by the hollow support so as to be able to rise and fall and forms an engagement part, and a support rod that forms an engagement part. a locking body having a locking portion formed on the upper part and a pivot portion to the hollow support; a spring body biasing the locking body in the direction of engagement; and a spring body formed on the hollow support and supporting the support. a bearing portion that pivotally supports the locking body so as to move in the vertical direction of the rod; a contact portion formed on the hollow column and with which the upper portion of the locking body comes into contact when the locking body moves upward; This problem is solved by means comprising an operating body that moves the body downward and releases the body from the engaging portion.

(E) Function The present invention is designed so that when the support rod moves upward while the locking body is engaged with the engaging portion, the locking body also moves upward, and the locking portion comes into contact with the abutment portion formed on the hollow support. The contact portion substantially prevents the support rod from rising, and the force applied to the locking portion is also received by the contact portion, and the force applied to the locking body is dispersed, so that the locking body is not damaged.

(f) Embodiment The present invention will be explained based on an elevating device for a support rod lifted and lowered by a hollow support 5 of a stand 2, using the electric fan 1 shown in FIGS. 1 to 21 as an embodiment.

FIG. 16 is a cross-sectional view of the support rod 3 supported by the stand 2 so as to be able to rise and fall freely, and FIGS. 2 to 4 are cross-sectional views taken along the -, -, - portions in FIG. 16. Fig. 5 is a perspective view of the electric fan 1 with the support rod 3 raised to its highest position, Fig. 6 is a right side view of the fan 1 in the same state as Fig. 5, with the guard body 4 in section, and Fig. 7 is the same sectional view. be. FIG. 8 shows that the support rod 3 is inserted into the hollow column 5 of the stand 2, and a constant load spring 7 is inserted to bias the support rod 3 in the upward direction and balance the fan main body 6 supported at the upper end of the support rod 3. 9 and 10 are exploded cross-sectional views showing the process of installing the supporting mounting rod 8 into the hollow support 5.
, is a sectional view taken at the - portion. 1st
FIG. 1 is a sectional view of the support rod 3 in its lowest position. FIG. 12 is a cross-sectional view of the bottom plate 10 that closes the lower surface of the base 9 of the stand 2 in an exploded state.
FIG. 13 shows the first part with the bottom plate 10 attached.
A sectional view of the - part in Figure 2, and Figure 14 is a cross-sectional view of the - part in Figure 1.
FIG. 2 is a cross-sectional view of the − part in FIG. 2; FIG. 15 is a rear view of a portion of the operating body 11 that holds the support rod 3 in its lowest position, FIG. 1 is a sectional view of the same portion, and FIG. FIG. 18 is an exploded perspective view of the locking body 12, spring body 13, bearing frame 14, and operating body 11 that hold the support rod 3 attached to the hollow column 5;
The figures to FIG. 21 are cross-sectional views illustrating the movement of each component shown in FIG. 18.

The stand 2 includes a synthetic resin base 9 having a board 15 on which a switch control circuit is mounted, a hollow support 5 protruding from the base 9, and a support rod 3 supported by the hollow support 5 so as to be movable up and down. and a bottom plate 10 that closes the lower opening of the base 9. The electric fan main body 6 supported on the upper part of the support rod 3 so as to be able to adjust the angle of elevation and elevation includes a neck piece 16 and a neck piece 16.
an electric motor 18 formed on the front surface of the upright wall of the L-shaped substrate 17 that is pivotally supported by the L-shaped substrate 17; a swinging device 19 formed on the horizontal wall of the L-shaped substrate 17; and an air blower attached to the rotor of the electric motor 18 with a spinner. It consists of a blade 20, a synthetic resin front and rear split cover body 21 that covers the L-shaped substrate 17 and the swinging device 19, and a guard body 4 that covers the blower blade 20. As the electric motor 18, an epidermal type De brushless motor is used, and as the oscillating device 19, a oscillating motor is used.

The support rod 3 has a support portion 23 formed with a bifurcated portion 22 for pivotally supporting the neck piece 16, and a lifting and lowering portion 24 formed with a storage holding portion 24 of a spiral portion of a constant force spring 7 fixed at one end to the mounting rod 8. It consists of a guide part 25, a decorative cylinder part 26 located between the support part 23 and the elevation guide part 25, and a reinforcing metal column part 27.
The support rod 23, the lifting guide section 25, and the decorative cylinder section 26
is molded from synthetic resin. The metal column portion 27 is formed of a pipe body. The decorative tube portion 26 is formed to have an egg-shaped cross section, and is connected to the support portion 23 and the lifting guide portion 2.
It is fitted into the protrusions 28 and 29 formed in 5. The lower end portion of the metal column portion 27 is inserted and fitted into an insertion hole 30 formed in the elevation guide portion 25, and the upper end portion is inserted and fitted into an insertion hole 31 formed in the support portion 23. A semi-circular rib 34 is formed at the lower end of the insertion hole 30 and fits into the inner surface of the lower end of the metal column 27.
The lower part of the decorative cylinder part 26, the lower part of the lifting guide part 25, and the lower part of the metal column part 27 are provided with screws 32 that are screwed in from the sides.
are fixedly connected and integrated. The support part 23
and the decorative cylinder portion 26 are integrated by connecting with a screw 33. The upper end portion of the metal column portion 27 is only inserted into the insertion hole 31, and is not connected to the upper portions of the support portion 23 and the decorative tube portion 26, and the metal column portion 27 can slide within the insertion hole 31 in the insertion direction. are connected like this. The insertion direction of the metal column part 27 into the insertion hole 31 of the support part 23 is set at a distance h as shown in FIG.
It forms a gap. The support rod 3 expands and contracts due to changes in the ambient temperature of the support rod 3. There is a difference in expansion and contraction between the synthetic resin decorative cylinder part 26 and the metal pillar part 27, and the change in the metal pillar part 27 is larger than that of the decorative cylinder part 26. In this embodiment, the decorative cylinder part 26 and the metal column part 2
The lower end of 7 is fixed, but the upper end is movable in the direction of expansion and contraction through the insertion hole 31, and absorbs the difference in expansion and contraction described above.

A screw (not shown) that presses the rib 34 inward is screwed into the lifting guide part 25, and an electric cord (not shown) inserted into the metal column part 27 is clamped and fixed from both sides.

As shown in the above embodiments, the supporting part 23 and the upper end part of the decorative cylinder part 26 are connected and integrated by screws 33 and 38, or the outer integrated structure is integrated at the time of molding, and the metal column part The lower end portion of 27 and the lifting guide portion 25 are connected and integrated with screws 32 and 37, or are fitted with an inner integrated structure formed by press fitting or molding so as to be relatively expandable and contractible. The lower end of the decorative cylinder part 26 is fixed to the lifting guide part 25 or the metal column part 27 as a relatively expandable structure, and the upper end of the metal column part 27 is a free end. The part is fixed to the support part 23, and the lower end part of the decorative cylinder part 26 is a free end, and the two integrated structures are connected by a screw inserted through a long hole.
In the direction of expansion and contraction, various structures are possible, such as a structure that allows expansion and contraction within the range of the elongated hole.

At the upper part of the hollow support 5, there is a support rod 3 that has risen the most.
A rib 40 is provided inside to stably support the lower part of the shaft and prevent it from rising any further. A rib 41 is formed in the rear surface of the hollow support 5 for inserting and guiding a mounting rod 8 having one end of the constant load spring 7 fixed to the upper end thereof. Elevating guide ribs 43 for guiding the grooves 42 of the elevating guide portion 25 are formed on both sides of the rear inner surface of the hollow support 5. At the top of the rib 41 of the hollow support 5 is a locking portion 4 that clamps and fixes the upper end of the mounting rod 8.
4 is formed by forming a notch at the lower end of the rib. The lower end of the mounting rod 8 is provided with a screw 46 that is screwed into a boss 45 hanging down from the joint between the base 9 and the support column 5. Since the boss 45 is formed at the joint portion, it can be formed without noticeable sink marks, and the strength can also be improved.
The storage holding part 24 formed in the lifting guide part 25 is box-shaped and opens downward, and the mounting rod 8
When the constant force spring 7 is inserted and installed, the elasticity of the constant force spring 7 causes the spiral part and the fixed end of the drawer part to engage at the lower edge of one end of the storage holding part 24, and the spiral part automatically holds the storage part. It is housed and held in the section 24.

The bottom plate 10 is made of synthetic resin and has a dish shape.
It is fixed to the base 9 with a screw 48 screwed into a boss 47 vertically provided on the base 9. An elastic bumper body 49 is sandwiched between the outer peripheral side wall joining edge of the bottom plate 10 and the base 9. A regulating support portion 50 that supports the lower end portion of the elevation guide rib 43 is provided in a protruding manner on the bottom plate 10 . The regulating support portion 50 clamps the lower end of the elevation guide rib 43 to prevent it from deflecting. The regulation support portion 50 protrudes laterally and inwardly from the elevation guide rib 43 and is wider than the groove portion 42 of the elevation guide portion 25.
The lifting guide portion 25 is prevented from being guided along the lifting guide rib 43, and further lowering is stopped.
By forming the regulating support part 50 on the bottom plate, which does not cause any problem in appearance even if it is formed with sufficient strength even if it is forcefully lowered by the lowering of the support rod 3 against the bias of the constant force spring 7, It is possible to prevent its descent without fear of damage or the like. The regulation support part 50
Although the structure is formed by a protrusion having a forked tip as in this embodiment, it is also possible to have a structure that can prevent the lower portion of the elevating guide rib 43 from swinging and deflecting, and also prevent the elevating guide portion 25 from descending. Bye. In order to smoothly prevent the support rod 3 from descending and to absorb the impact when the support rod 3 is prevented from descending, an elastic piece may be formed on the bottom plate 10 to reduce the descending force. Alternatively, a structure may be adopted in which a platform portion that abuts the spiral portion of the constant force spring 7 is formed on the bottom plate 10 so that the elasticity of the constant force spring 7 is utilized to absorb the downward force and the shock at the time of blocking.

The support rod 3 is balanced with the weight of the fan main body 6 by the biasing force of the constant load spring 7, and the frictional force with each part of the hollow support 5 allows the support rod 3 to be adjusted to the vertically adjustable position as appropriate even without a special stopping device. It can be stopped stably. When carrying the electric fan 1, if it is desired to carry it smoothly by carrying it by the handle portion 51 formed on the electric fan body 6, it is necessary that the support rod 3 is locked in the lowest position. becomes. The support rod 3 is locked in the lowest position by the locking body 12.
This is performed by engaging and disengaging the lifting locking device formed by the spring body 13, the bearing frame body 14, and the operating body 11 into the engagement recess 52 formed in the support rod 3. The structure and operation will be explained based on FIGS. 19 to 21.

The locking body 12 is formed in a dogleg shape, and has an engagement claw portion 53 for engaging the engagement recess 52 at its upper end, an operating portion 54 of the operating body 11 at its lower end, and a foldable portion. Pin-shaped pivot portions 55 are formed on both sides of the curved portion. The operating body 11 is connected to the opening 5 of the bearing frame 14.
6 and the above-mentioned locking body 12.
A protrusion 58 is formed to operate the action section 54 of the holder. The bearing frame 14 is formed in a box shape with an opening on the rear surface, and an opening 59 is formed on the upper rear surface of the hollow support 5.
will be installed on the Attachment to the opening 59 is carried out by locking a protrusion 60 formed at the upper end to the upper edge of the opening 59 and locking an elastic claw piece 61 formed at the lower part to the lower part of the opening 59. A bearing part 62 for pivotally supporting the pivot part 55 of the locking body 12 is formed in the bearing frame 14, and in this embodiment, the bearing part 62 is formed as a long hole extending in the vertical direction of the support rod 3. are doing. The locking body 12 is pivotally supported to the bearing part 62 by the bearing frame 1.
This is done by utilizing the elastic deformation of 4. At the same time as the locking body 12 is pivoted to the bearing frame 14, the locking body 1
The coiled spring body 13, which biases the coil spring body 13 in the direction of engagement with the engagement recess 52, is fitted onto the pivot portion 55. One end of the spring body 13 is locked to the locking body 12, and the other end is pressed against the inner surface of the bearing frame 14. The locking body 12 has an engaging recess 52 as shown in FIG.
, and prevents the support rod 3 from rising. If an attempt is made to raise the support rod 3 in this state, the pivot portion of the locking body 12 is located outside the point of action on the engagement recess 52, so the locking body 12 rotates in the direction of releasing its engagement. try to. At this time, due to the pivot structure of the pivot portion 55 and the bearing portion 62, the locking body 12 moves upward before rotating, and its upper end abuts and engages with a stepped portion 63 formed on the ceiling of the bearing frame 14. This prevents the locking body 12 from rotating. Therefore, even if an attempt is made to raise the support rod 3, the locking body 12 will not disengage from the engagement recess 52. Further, since the engaging claw portion 53 comes into contact with the ceiling of the bearing frame 14, the bearing frame 14 acts as a reinforcing member for the engaging claw portion 53. By moving the operating body 11 downward along the opening 56, the protrusion 58 comes into contact with the action part 54 of the locking body 12, and the locking body 12 is lowered and rotated at the same time, so that the engaging claw The engagement between the portion 53 and the engagement recess 52 is released. The locking body 12 is biased in the engaging direction by the spring body 13, so that a force to move the operating body 11 upward acts on the locking body 12.
4 is formed in the shape of a recess that matches the shape of the tip of the protrusion 58, so that the force that tends to move the operating body 11 upward is converted into a force that pushes the operating body 11 outward. Further, the elastic claw pieces 5 are provided on both sides of the opening 56.
By forming the protrusion 64 which can be climbed over to such an extent that the locking body 7 does not disengage, the operating body 11 is reliably held in the two positions where the locking body 12 is engaged and disengaged.

It should be noted that the present invention is not limited to the above-described embodiments, but can be implemented with various changes without departing from the effects and effects of the present invention. That is, after the locking body 12, the spring body 13, and the operating body 11 are assembled into the bearing frame 14, the bearing frame 1 is attached to the opening 59 of the hollow support 5.
4 may be integrally molded with the hollow support 5. Alternatively, the spring body 13 may be formed into one piece by forming an elastic piece on the locking body 12. Furthermore, the bearing part 62 and the pivot part 5
5 may be of any structure as long as it can pivot to move the support rod 3 in the vertical direction, and the bearing portion 62 may be formed of a pin, and the pivot portion 55 may be formed of a long groove. The support rod 3 is formed at a position where the engaging recess 52 of the locking body 12 engages when it is lowered most, but it may also be formed at the highest raised position or a height position where it is frequently used. . When a plurality of the engagement recesses 52 are formed, the upper inclined surface of the engagement claw portion 53 of the locking body 12 acts effectively and the support rod 3 can be lowered without resistance.

A stepped portion 63 is formed in the portion of the bearing frame 14 that the locking body 12 abuts to prevent rotation of the locking body 12.
Depending on the position of the engaging claw portion 53, it will not receive rotational force from the support rod 3, and in this case, it is sufficient to simply bring it into contact. Further, by forming the abutting portion of the locking body 12 as a slope that slopes upward toward the support rod 3, the engagement force between the engagement claw portion 53 and the engagement recess 52 can be strengthened.

(g) Effects of the invention The present invention allows the locking part of the locking body to be brought into contact with the abutting part of the hollow support of the equipment frame by raising the support rod when the locking body is engaged with the engaging part. By making them contact each other, it is possible to substantially prevent the support rod from rising, thereby ensuring that the hollow support rod and the support rod are held in a locked state, and also to prevent the force applied to the locking part of the locking body from being applied. By receiving the force through the contact part, the force applied to the locking body is dispersed, so the locking body can be reinforced, and even if a large force is applied, the locking body will not be damaged, making it stable over a long period of time. In addition, since the locking body is not ring-shaped as in the conventional case, the storage space for the locking body is small, and a support rod lifting device whose structure can be simplified and made compact can be obtained. .

[Brief explanation of the drawing]

The figures show an embodiment of the present invention, in which Fig. 1 is a sectional view of the main part of the invention, Fig. 2 is a - sectional view of Fig. 16, Fig. 3 is a - sectional view of Fig. 16, and Fig. The figure is a sectional view of the fan in Fig. 16, Fig. 5 is a perspective view of the electric fan with the support rod raised, Fig. 6 is a right side view of the fan, Fig. 7 is a sectional view of the fan, and Fig. 8 shows the constant force spring device. 9 is an exploded sectional view of the fan shown in FIG. 8, FIG. 10 is a sectional view of FIG. Figure 13 is an exploded cross-sectional view of Figure 12.
14 is a cross-sectional view of FIG. 12, and FIG. 15 is a rear view of the support rod locking part.
Figure 6 is a cross-sectional view of the support rod, Figure 17 is a cross-sectional view of Figure 15, Figure 18 is an exploded perspective view of the support rod lifting and lowering locking device, and Figures 19 to 21 are the support rod lifting and lowering locking device. FIG. 2...Stand (equipment frame), 3...Support rod,
5...Hollow strut, 11...Operation body, 12...Locking body, 13...Spring body, 14...Bearing frame (equipment frame), 52...Engagement recess (engagement part), 53 ...Engaging claw part, 55... Pivotal part, 62... Bearing part, 63...
...Stepped part (contact part).

Claims (1)

[Claims for Utility Model Registration] (1) A device frame forming a hollow support, a support rod supported by the hollow support so as to be able to rise and fall and forming an engaging portion, and a locking portion for the engaging portion. a locking body formed on the upper part and forming a pivot portion to the hollow support; a spring body biasing the locking body in the direction of engagement; a bearing part that pivotally supports the locking body so as to move in the direction; a contact part formed on the hollow support column and with which the top of the locking body comes into contact when the locking body moves upward;
A support rod lifting device for equipment comprising an operating body that moves the locking body downward and releases it from the engagement portion. (2) The utility model registration claim set forth in claim 1, in which the pivot portion and the bearing portion are formed on the side of the hollow column from the support rod, and the abutting portion is formed as a stepped portion that engages with the locking body. Equipment support rod lifting device. (3) Utility model registration claim No. 1, in which a bearing part and an abutting part are formed on a lid body that closes an opening formed in a hollow support, and a locking body, a spring body, and an operating body are attached to the lid body. A support rod lifting device for the equipment according to item 1 or 2.