Abstract:
It is an object to decrease the size of the intake unit and to increase possibility of incorporating this intake unit to the existing drawer, sliding door, and so on. The intake unit engaging with a projection portion of the drawing device to move a drawer in the predetermined direction comprises a basic substrate; a cylindrical shock absorber; a movement member releasably engaged at one end of movement stroke; a pulley supported on the side of movement of the cylindrical shock absorber; and a flexible member in which a middle portion thereof is suspended to the pulley, one end is connected to said movement member, and the other end is connected to said basic substrate. When the movement member is released from the lock state, said movement member moves by predetermined stroke in one direction due to urging force of the urging means, and against this movement, a brake of said cylindrical shock absorber is applied through said flexible member.

Description:
BACKGROUND OF THE INVENTION  
       [0001]     The present invention relates to an intake unit used for a drawing device such as a drawer, sliding unit, and so on.  
         [0002]     The intake unit to be used for a conventional drawing device such as a drawer, sliding unit, and so on has employed a structure to let a long-sized rack gear be engaged with a pinion gear to control the rotation of the above-mentioned pinion gear by a rotary damper mechanism.  
         [0003]     If employing a structure to use a rack gear and pinion gear to convert to a rotary movement from a linear movement of a movement member movably supported to a basic substrate of a drawing device, there are following two methods. One is a method in which the long-sized rack gear  22  is attached to the side of the movement member  2 , the rotary damper  4  is attached to the fixed side (basic substrate  12 ) to let the gearwheel  20  provided on the rotary portion of the rotary damper  4  be engaged with the tooth portion of the above-mentioned rack gear  22  as shown in  FIGS. 17 and 18 . The other is a method to attach the long-sized rack gear to the fixed side (basic substrate side), and attach the rotary damper to the movement member to let the gearwheel provided on the rotary portion of the rotary damper be engaged with the tooth of the above-mentioned rack gear. (for example, refer to Japanese Published Unexamined Patent Application No. H5-317133).  
         [0004]      FIGS. 17 and 18 , and  FIGS. 19 and 20  show a conventional device which employed the second method.  
         [0005]     In  FIG. 17 , the reference numeral  2  is a movement member  2 , numeral  4  is a rotary damper mounted on the movement member, numeral  12  is a basic substrate, numerals  14  and  16  are support blocks to fix the basic substrate  12  to the drawer of drawing device or the bottom plate of the external box and numeral  18  is a coil spring movably supported by the basic substrate  12  to urge the movement member  2  toward the opposite support block  14  in the longitudinal direction of the basic substrate  12 . On the rotary side of the rotary damper  4  whose axis side was fixed to the movement member  2 , the gearwheel  20  is securely installed and the foregoing gearwheel  20  is engaged with the rack gear  22  on the basic substrate  12 . Numeral  24  is a slider movably supporting the engagement member  26  formed with the first and second engagement portions  8  and  10 , and is slidably attached to the basic the basic substrate  12  and connected to the movement member  2 . In  FIG. 19 , numeral  28  is a holding body which is securely installed in the gearwheel  20  and supports the engagement member  26  at the right angle to the mounted position of the rotary damper  4  in the movement direction of the movement member  2  of the unit. The structure other than mentioned above is the same as that of the conventional device shown in  FIG. 17 .  
         [0006]     In the structure of above-mentioned conventional device, when the drawer is pulled out from the external box, the movement member  2  is moved to the right end of the basic substrate  12  in the drawing against the springing force of the spring  18  and is locked in the foregoing position with a locking means (not illustrated). If pushing the drawer toward the back of the external box by hand from the condition in which the drawer is pulled out from the external box, the projection portion  6  is engaged with the 1st engagement portion  8 , the pressing force to the first engagement portion  8  of the projection portion  6  releases the locked conditions to the movement member  2 , and the movement member  2  is moved leftward by the springing force of the spring  18  along the basic substrate  12  in the drawing. At this time, the projection portion  6  is engaged with the second engagement portion  10  to transfer the movement force on the movement member  2  side by the springing force of the spring  18  to the drawer, which is pulled in toward the back side of the external box by the springing force. For the movement of the movement member  2  by the springing force of the spring  18  along the basic substrate  12 , the braking force by the rotation damper  4  is applied to the movement of the movement member  2 , which causes the drawer to be slowly pulled in toward the back side without quick action.  
         [0007]     If the first method is employed, since the movement member  2  is moved with the long-sized rack gear  22  mounted as shown in  FIG. 16 , the intake unit becomes extremely long-sized along the movement direction of the above-mentioned movement direction to have to be large-sized.  
         [0008]     Meanwhile, if the second method is employed, the movement member  2  will move with the rotary damper  4  mounted on the movement route formed with the basic substrate  12  as shown in  FIGS. 17 and 19 . In this case, in this movement member  2 , the movement member  2  needs to be provided with the first engagement portion  8  which can be engaged with the projection portion  6  in one movement route, which is provided in the above movement member  2  as protruding in the movement route for the projection portion  6  provided in the pulled-in member, and second engagement portion  10  which can be engaged in movement routes in other directions. Depending on the position where the rotary damper  4  is mounted on the movement member  2 , as the conventional device shown in  FIG. 16 , the above-mentioned first engagement portion  8  and the second engagement portion  10  have to be placed as protruding at the right angle (width direction) to the above-mentioned rotary damper  4  mounting position and the movement direction of the above-mentioned movement member  2 , and/or in the movement direction X of the above-mentioned movement member  2 , or at the right angle Y (thickness direction) to the above-mentioned movement member  2  as shown in  FIGS. 19 and 20 .  
         [0009]     If the above-mentioned first engagement portion  8  and second engagement portion  10  are placed at the right angled (width direction) to the above-mentioned rotary type damper mounted position and the above-mentioned movement member  2  movement direction, the direction, that is the size in the width direction of the intake device becomes larger, causing the entire device size to be larger in the result. In addition, if the above-mentioned first engagement portion  8  and second engagement portion  10  are placed at the right angle (Y) (thickness direction) to the above-mentioned rotary damper  4  mounted position, a space needs to be provided in the thickness direction. In addition, particularly if the above-mentioned first engagement portion and second engagement portion are placed at the right angle (d) (width direction) to the above-mentioned rotary damper mounted position and the movement direction of the above-mentioned movement member, or if placed at the right angle (Y) of the device (thickness direction), the device will occupy a space throughout a range of movement.  
         [0010]     After all, either in the first method or second method, if the structure using a rack gear and a pinion gear is employed, a space to be occupied by the intake unit will become larger and the size of the intake unit has to be large-sized entirely.  
         [0011]     In case that this intake device is assembled and produced from the design stage of a drawing device such a drawer, sliding door, and so on, even if a space to be occupied by the intake device is larger, design can be performed and such a big problem will not be arisen. However, if attaching an intake unit to a drawer, sliding door, and so on which were already completed, that is, if an intake device is regarded as a unit itself, a space where an intake device unit is placed in the completed drawer, sliding door, and so on is limited, and there are many cases of insufficient placement space for an intake device. In these cases, it is impossible even to assemble an intake device unit.  
         [0012]     The present invention has an object to miniaturize the intake unit as much as possible and to greatly increase the possibility to assemble it into a ready-made drawer, sliding door, and so on in order to solve the above-mentioned problems.  
       SUMMARY OF THE INVENTION  
       [0013]     An intake unit engaging with a projection portion of a drawing device to move a drawer in the predetermined direction, comprises:  
         [0014]     a basic substrate;  
         [0015]     a cylindrical shock absorber;  
         [0016]     a movement member;  
         [0017]     a movement member guide mechanism provided to foregoing basic substrate for movably and linearly guiding foregoing movement member along foregoing basic substrate within a scope of predetermined stroke;  
         [0018]     an urging means provided on foregoing basic substrate side for urging foregoing movement member in one direction;  
         [0019]     a first engagement portion provided in foregoing movement member for engaging with foregoing projection portion when foregoing projection portion moves relatively to foregoing movement member in one direction;  
         [0020]     a second engagement portion provided in foregoing movement member for engaging foregoing projection portion when foregoing projection portion moves relatively to foregoing movement member in the other direction;  
         [0021]     an locking means which releasably locks movement of foregoing movement member at the end of movement of foregoing movement member resisting an urging force of foregoing urging means and which releases this lock by pressure due to one direction relative movement of foregoing projection portion with respect to foregoing first engagement portion; and  
         [0022]     a pulley which is supported to the foregoing movement side as interlocking with the movement side of the shock absorber of the foregoing cylindrical shock absorber; and  
         [0023]     a flexible member in which a middle portion is engaged with the foregoing pulley and one end is connected to the foregoing movement member and the other end is connected to the foregoing basic substrate.  
         [0024]     The foregoing cylindrical shock absorber has a structure of applying a braking force to a telescopic relative movement between a cylinder and a piston rod, one end of which is a movable side and other end is a fixed side, the cylindrical shock absorber being attached to foregoing basic substrate on the fixed side. The foregoing movement member is released from the lock state, said movement member moves by predetermined stroke in one direction due to urging force of said urging means, and against this movement, a braking force of said cylindrical shock absorber is applied through said flexible member  
         [0025]     It is preferable that the foregoing cylindrical shock absorber comprises an initial position returning means pushing the piston rod outward from the cylinder.  
         [0026]     It is preferable that the foregoing urging means is a coil spring which is connected to said movement member at one end thereof and connected to said basic substrate at the other end thereof, and which changes direction by a direction change mechanism in the middle thereof.  
         [0027]     It is preferable that the foregoing cylindrical shock absorber which comprises: a cylinder filled with oil; a piston formed with a bore for passing through the oil substantially without resistance; a piston rod connected to foregoing piston; a valve opening foregoing bore when foregoing piston moves in one direction inside foregoing cylinder and closing foregoing bore when foregoing piston moves in other direction; and a coil spring disposed between a back end of foregoing cylinder and a spring receiver attached to foregoing piston rod, wherein foregoing coil spring comprises an initial position returning means pushing the piston rod outward from the cylinder.  
         [0028]     The present invention enables an intake device unit to be miniaturized and to greatly increase the possibility to assemble it into a ready-made drawer, sliding door, and so on than before by composing the system as above mentioned. 
     
    
     DESCRIPTION OF DRAWINGS  
       [0029]      FIG. 1  is an elevational graphical view showing an intake unit according to the present invention.  
         [0030]      FIG. 2  is an A-A line sectional view showing an intake unit.  
         [0031]      FIG. 3  is an elevational view showing an intake unit.  
         [0032]      FIG. 4  is a right-side elevational view showing an intake unit.  
         [0033]      FIG. 5  is a left-side side elevational view showing an intake unit.  
         [0034]      FIG. 6  is a rear elevational view showing an intake unit.  
         [0035]      FIG. 7  is a plan view showing an intake unit.  
         [0036]      FIG. 8  is a elevational view showing an intake unit whose cover is removed.  
         [0037]      FIG. 9  is a rear elevational view showing a cover.  
         [0038]      FIG. 10  is a bottom plan view showing a cover.  
         [0039]      FIG. 11  is an operational graphical view according to the present invention.  
         [0040]      FIG. 12  is an operational graphical view according to the present invention.  
         [0041]      FIG. 13  is an operational graphical view according to the present invention.  
         [0042]      FIG. 14  is an operational graphical view according to the present invention.  
         [0043]      FIG. 15  is a sectional view showing examples other than the present invention.  
         [0044]      FIG. 16  is an elevational graphical view according to a prior art.  
         [0045]      FIG. 17  is an elevational graphical view according to a prior art.  
         [0046]      FIG. 18  is plan graphical view according to a prior art.  
         [0047]      FIG. 19  is an elevational graphical view according to a prior art.  
         [0048]      FIG. 20  is plan graphical view according to a prior art. 
     
    
     DETAILED DESCRIPTION OF THE INVENTION  
       [0049]     Embodiments according to the invention are hereinafter described with reference to the accompanying drawings.  
         [0050]     In  FIG. 1 , numeral  30  is a basic substrate of an intake unit  32  according to the present invention and serves as a casing. The foregoing basic substrate  30  is a resin molded product and comprises a main body  34  and a cover  36  fixed to some part of an opening thereof as shown in  FIG. 2  and  FIG. 3 . In a storage space of the foregoing basic substrate, an intake composition element described below is stored and placed, and the foregoing substrate  30  and these composition elements are entirely simplified (unified) as an intake unit. The both-side wall portions of the foregoing basic substrate  30  is formed with a groove  38 . The foregoing groove  38  is equipped with a linear portion  38   a  extended in the longitudinal direction of the basic substrate  30 , locking portion  38   b  which is semi-perpendicular to the above  38   a  and a curved portion  38   c  formed in a connection portion between the foregoing locking portion  38   b  and the linear portion  38   a . Numeral  40  is a resin-made movement member, which is protruded by axial convex fitting portions  42  and  44  which are extended horizontally being located around the forging member in a predetermined interval with each other. The foregoing fitting convex portions  42  and  44  are slidably fitted into the foregoing groove  38 . The foregoing movement member  40  is in a unified manner formed with a U-shaped chuck portion  46 . Around the foregoing chuck portion  46 , a first engagement portion  48  and a second engagement portion  50  are formed with a predetermined interval.  
         [0051]     In addition, the foregoing movement member  40  is in a unified manner formed with an emergent-use engagement member  52 , which is in a unified manner connected to the movement member  40  through an elongated spring portion  52 . The foregoing emergent-use engagement member  52  is formed with a 3rd engagement portion adjacent to an inclined plate  52   b . In addition, the foregoing engagement member  52  is in unified manner formed with a projected piece  52   c  for locking and the end of the projected piece  52   c  for locking has a little space and faces to a stopper  56  formed in the movement member  40 .  
         [0052]     Numeral  58  is cylindrical shock absorber and incorporates a resisting means in a cylinder  60  for a case to apply a braking force to a relative movement along the linear direction of a piston rod  62  and the cylinder  60 . According to the present embodiment, an oil-type shock absorber with the cylinder  60  filled with oil is employed but not to limited to a shock absorber illustrated, and if a composition can apply a predetermined braking force to a relative movement in one-way direction or reciprocating (2-way) direction along the linear direction between the cylinder  60  and the piston rod  62 , it is preferable to compose whatever instead of the shock absorber illustrated.  
         [0053]     The cylindrical shock absorber  58  according to the present embodiment as shown in  FIG. 1 , comprises a cap  64 , a seal  66  for rod, an accumulator  68  composed of a sponge and a foamed rubber to adjust the capacity in the cylinder  58 , an accumulator holder  70 , a piston  72 , a valve  74  to open/close a through-hole of the piston  72 , a spring holder  76 , a coil spring  78  for rod recovery, a rear-end-side seal  80 , a rear-end lid  82 , a pulling-prevention stopper  84  for piston rod, and so on. When the cylindrical shock absorber  58  is moved leftward from the original position which the piston  62  protrudes uppermost rightward to the cylinder  58  in  FIG. 1 , the piston  72  which is secured to the piston rod  62  and interlocked with it, takes against the springing force of the coil spring  78  and moves leftward in the cylinder  58 .  
         [0054]     At this time, since the piston  72  is moved leftward in the cylinder  58  with the through-hole clogged with the valve  74 , the piston  72  receives much more fluid pressure by oil passing over a little clearance (not illustrated) between the piston  72  and the cylinder  58 . This fluid pressure affects much more braking force to the leftward movement to the cylinder  58  in  FIG. 1 .  FIG. 1  shows a condition where the piston  62  is pressed into the cylinder  60  uppermost. Meanwhile, if the leftward pressing force to the piston rod  62  is released, the piston  72  is pressed rightward by the springing force of the coil spring  78  and is moved in a rightward recovery direction in the cylinder  58  by this pressure force in  FIG. 1 .  
         [0055]     At this time, the piston  72  is moved backward along the piston  62  until the valve  76  is locked in the spring holder  76  by the oil pressure passing over the through hole of the piston  72  and is separated from the through-hole of the piston  72  and moved in the recovery direction without receiving much oil resistance due to the release of the through-hole, and is moved in the recovery direction by the springing force of the coil spring  78  in the cylinder  60  in  FIG. 1 . This prevents a large amount of braking force to being applied to the rightward recovery movement of the piston rod  62  in  FIG. 1 . The foregoing cylindrical shock absorber  58  is located sideways in the basic substrate  30  and is fitted and maintained to a holder portion  86  formed with one end of the cylinder  60  in the basic substrate  30 . A rod cap  88  is secured to the end of the piston rod  62  of the cylindrical shock absorber  58  and this curved holding surface is rotatably supported by a pulley  90 .  
         [0056]     On a side wall of the foregoing basic substrate  30  and a inner wall of the cover  36 , guide grooves  92 ,  92  extending in a linear direction in parallel with the linear portion  38   a  of the foregoing groove  38  is formed and a shaft portion  90   a  of the foregoing pulley  90  (refer to  FIG. 2 ) and foregoing rod cap  88  are slidably fitted into the foregoing guide grooves  92 ,  92 . An intermediate portion of a flexible member  94  composed of a wire is engaged with the V-shaped groove of the foregoing pulley  90  as making a U-turn around this pulley  90  as a standard, one end of the foregoing flexible member  94  is connected to the lower part of the foregoing movement member  40  through a wire fixing member  96  and the other end of the flexible member  94  is attached to the basic substrate  30  through the wire locking member  98 .  
         [0057]     The foregoing pulley  90  comprises a guide portion to guide the foregoing flexible member  94  in the U-turn direction. This guide portion at the movement side of the shock absorber  58  is not limited to the special composition of the pulley but can undergo various design changes. For example, as shown in  FIG. 15 , it is preferable that the movement side of the shock absorber  58  such as the piston rod  62 , and so on is provided with a convex portion  89  having a curved surface in unified manner, the flexible portion  94  which is engaged with the curved surface of the foregoing convex portion  89 , that is, and the guiding surface is moved in a U-turn direction while sliding on the guiding surface of the foregoing convex surface  89  to compose the foregoing convex section  89  as a guiding portion. In this case, it is preferable that the guide portion of the convex section  89  is provided with a restricting means such as guide grooves to prevent the misalignment in the detachment direction of the flexible member  94  from the foregoing guide surface. In addition, the compositions other than the intake unit shown in  FIG. 15  are the same as those shown in  FIG. 1 .  
         [0058]     Numeral  100  is an intake spring composed of a coil spring, one end thereof is connected to an fitting  102  formed in a lower portion of the movement member  40  and the other end thereof is position-adjustably connected to one side of the basic substrate through a fitting  104 . The intermediate portion of the foregoing intake spring  100  is placed crookedly in a laid-down U-shaped manner by a direction change mechanism composing of a curved guide surface  106  formed in the basic substrate  30 .  
         [0059]     Next, an intake operation where an intake unit is attached to a drawing device is hereinafter described with reference to  FIG. 11  through  FIG. 13 . In addition,  FIG. 12  shows a drawing device viewing from overhead and  FIG. 13  shows a drawing device viewing end-on. The conditions from (A) to (D) in  FIG. 12  correspond to the conditions from (A) to (D) in  FIG. 13 .  
         [0060]     In  FIG. 12 , numeral  108  is an external box (main body) of the drawing devices such as a drawer, sliding door, and so on, into which a drawer slidably fitted. The drawer  110  shows a movement body such as a drawer, sliding door, and so on.  
         [0061]     The bottom plate of the drawer  110  is protruded by projection portion  6  composed of a pin. The basic substrate is secured to the bottom plate of the external box  108  as a chuck portion  46  of the foregoing movement member  40  is placed on a movement route of the foregoing projection portion  6  and the linear portion  38   a  of the groove portion  38  is in parallel with the movement direction of the drawer  110 . It is preferable that the basic substrate  30  is attached to the drawer  110  side. In this case, the projection portion  6  is provided in the external box  108 .  
         [0062]     As shown by (A) of  FIG. 12 , in a condition that the drawer  110  is pulled out from the external box  108  and the projection portion  6  is detached from the chuck section  46 , the fitting convex portion  44  is located in the locking portion  38   b  of the groove  38  as shown in (A) of  FIG. 11 , by which the movement member  40  is locked to the intake movement standby position at one end of the movement stroke. In this condition, a tensile strength due to the intake spring  100  affects the movement member  40 , which is strongly pulled leftward in  FIG. 11  by the foregoing intake spring  100 .  
         [0063]     In a condition that the fitting convex portion  44  is fitted into the locking portion  38   b  of the groove  38 , the movement member  40  is clockwise inclined around the fitting convex portion  42  by a predetermined angle as shown in (A) of  FIG. 11 , and this inclination causes the emergent-use engagement portion member  52  to be moved downward as shown in (A) of  FIG. 11 . In addition, in the condition that this movement member  40  is inclined, the portion between the engagement surface of the first engagement portion  48  and the projection portion  6  at the drawer  100  side is opened and the upper end of the second engagement portion  50  and the upper end of the emergent-use engagement member  52  are detached from the movement route of the projection portion  6 .  
         [0064]     In the above-mentioned condition, when the drawer  100  is inserted into the external box  108  by hand and the drawer  110  is moved to the predetermined position in the arrow&#39;s direction in  FIG. 12 , the projection portion  6  abuts on the first engagement portion  48  of the movement member  40 .  
         [0065]     Furthermore, if the drawer  110  is moved in the arrow&#39;s direction, the movement member  40  is pushed leftward in  FIG. 11  by the projection portion  6  and is anti-clockwise rotated around the fitting convex portion  42  as shown in (A) of  FIG. 11 . This causes the fitting convex portion  44  to be lifted up from the locking portion  38   b  and ride on the linear portion  38   a  of the groove  38  through the curved portion  38   c  of the groove  38  as shown in (B) of  FIG. 11 . If the movement member  40  is anti-clockwise rotated around the fitting convex portion  42  by the predetermined angle in  FIG. 11 , the second engagement portion  50  is lifted up. This causes the projection portion  6  to be engaged with the chuck portion  46  between the first and second engagement portions  48  and  50  and placed as shown in (B) of  FIG. 11 .  
         [0066]     If the fitting convex portion  44  is detached from the engagement portion  38   a  of the groove  38  by the pressure force from the projection portion  6 , the locking condition to the movement member  40  by the locking portion  38   b  is released, the movement member  40  is moved along the linear portion  38   a  of the groove  38  leftward in  FIG. 11  and toward the backside of the external box  108  in the arrow&#39;s direction in  FIG. 12  by the tensile strength of the intake spring  100 . If the movement member  40  is moved leftward in  FIG. 11  by the tensile strength of the intake spring  100 . the second engagement portion  5  of the movement member  40  is engaged with the projection portion  6  (refer to C of  FIG. 11  and C of  FIG. 12 ), and the movement member  40  draws the drawer  110  toward the back side of the external box  108  by the movement force (refer to D of  FIG. 11  and D of  FIG. 12 ).  
         [0067]     At this time, the movement operation of the movement member  40  by the intake spring  100  is transferred through the flexible member  94  to the pulley  90 , which is moved leftward in  FIG. 11  along the guide groove  92  while rotating in association with the leftward movement. In association with this movement of the pulley  90 , the piston rod  62  of the cylindrical shock absorber  58  is moved linearly toward the back side of the cylinder  60 , the braking force by the cylindrical shock absorber  58  affects the leftward movement operation of the movement member  40  in  FIG. 11  and the drawer  110  is drawn slowly at a proper seed toward the back side through the projection portion  6  without quick movement by the tensile strength of the intake spring  100 . The piston rod  62  is urged rightward in  FIG. 11  by the coil spring  78  for recovery, however, the leftward tensile strength by the intake spring  100  in  FIG. 11  is designed to be larger than this urging force.  
         [0068]     If the drawer  110  is moved to the uppermost back side of the external box  108 , as shown in (D) of  FIG. 11 , in the fitting convex portion  42 , the attachment position of the basic substrate  30  to the external box  108  is adjusted in advance as reaching the intake end of the linear portion  38   a  of the groove  38  or the vicinity. The movement stroke along the guide groove  92  of the foregoing pulley  90  in association with the movement along the linear portion  38   a  of the groove  38  of the foregoing movement member  40  becomes half of the movement stroke of the movement member  40  on the basis of principle of the movable pulley, which enables the whole length of the guide groove  92  to be shortened and the basic substrate  30  to be miniaturized.  
         [0069]     If the drawer  110  is pulled out outward by hand from the condition inserted into the external box  108 , the projection portion  6  is moved rightward from the condition (D) in  FIG. 11  with it engaged with the second engagement portion  50  of the movement member  40  and the movement member  40  takes against the tensile strength of the intake spring  100  and is moved rightward along the liner portion  38   a  of the groove  38 . If the drawer  110  is pulled out up to the predetermined position by hand, the fitting convex portion  44  is guided by the locking portion  38   b  of the groove  38  and reaches the back side end of the locking portion  38   b.    
         [0070]     At this time, the movement member  40  is inclined clockwise around the fitting convex portion  42  in  FIG. 11  and the projection  6  is released from the engagement condition with the second engagement portion  50 . This causes the projection portion  6  to interlock with the movement in the drawing direction of the drawer  110 , be detached from the chuck portion  46  of the movement member  40  and be moved rightward in  FIG. 11 . Little braking force is applied to the movement of the movement member  40  linking with the drawer  110  from the cylindrical shock absorber  58 . If the movement member  40  is moved rightward, in association with this movement, the pulley  90  is moved rightward along the guide groove  92  due to the springing force of the coil spring  78  of the cylinder  58 .  
         [0071]     When the foregoing fitting convex portion  44  is fitted into the locking portion  38   b  of the foregoing groove  38 , the position of the joint portion between the foregoing intake spring  100  and the movement member  40 , that is, the position of the fitting  102  is located slightly lower than the fitting convex portion  44  in the locking portion  38   b . This lets the intake spring  100  pull leftward the lower portion than the engagement position of the movement member  40  with the locking portion  38   b  to prevent the fitting convex portion  44  from being detached from the locking portion  38   b.    
         [0072]     In addition, in a condition that the drawer  110  is pulled out from the external box  108  as shown in (A) of  FIG. 12 , the movement member  40  is normally located on the left end of the movement stroke (right end in case of in (A) of  FIG. 11 ) and locked by the locking portion  38  of the groove  38 , however, in a condition that the drawer  110  pulled out due to some accident, the movement member  40  can be moved to the right end of the movement stroke (left end in case of  FIG. 1 ).  
         [0073]     In this case, it is necessary to return to the left end as a steady position (right end in case of  FIG. 1 ) as shown in (A) of  FIG. 14 . The emergent-use engagement member  52  is provided as a remedy.  FIG. 14  shows the movement to return the position of the movement member  40  to the steady position.  
         [0074]     First, if the drawer  110  is pushed by hand in the closing direction as shown by the arrow&#39;s direction in  FIG. 14  to let the projection portion  6  collide with the inclined surface  52   b  of the emergent-use engagement member  52  (refer to (B) of  FIG. 14 ), furthermore is pushed toward the back side as shown in (C) of  FIG. 14 , the engagement member  52  takes against the spring force of the spring portion  52   a  (refer to  FIG. 1 ) and is pushed in the pulling direction from the basic substrate  30 , that is, in the lower direction in  FIG. 1  by the projection portion  6 .  
         [0075]     After the projection portion  6  climbs over the inclined surface  52   b , the emergent-use engagement-use engagement member  52  is recovered to the original position by the spring force of the spring portion  52   a , the projection portion  6  is fitted into the section between the 3rd engagement portion  54  and the second engagement portion  50  and the projection portion  6  is chucked between the engagement portions  54  and  50  (refer to (C) of  FIG. 14 ). Next, if the drawer  110  is pulled by hand as shown in (D) of  FIG. 14 , the leftward movement is transferred to the movement member  40  through the 3rd engagement portion  54 , the movement member  40  is moved leftward together with the drawer  110  along the groove  38 , the fitting convex portion  44  is fitted into the locking portion  38   b  of the groove  38  and the movement member  40  is returned to the steady position and locked to the foregoing position.  
         [0076]     While the movement member  40  is returned to the steady position, the 3rd engagement portion  54  receives the pressure at the right side from the projection portion  6  in  FIG. 1  and the spring  52   a  is bent by this pressure and the engagement member  52  is inclined to slightly lift up the a projected piece  52   c  for locking, however, the lift-up displacement of this projected piece  52   c  for locking is locked by the stopper  56  formed in the movement member  40 .  
         [0077]     For this reason, the engagement member  52  is not greatly inclined by the pressure from the projection portion  6  and the projection portion  6  is not detached from the 3rd engagement portion  54  of the engagement member  52 .  
         [0078]     According to the above-mentioned embodiments, the linear portion  38   a  of the foregoing groove  38  and the fitting convex portions  42 ,  44  fitted into them, comprise a movement member guide mechanism to linearly and movably guide the foregoing movement member  40  along the foregoing basic substrate  30  within the predetermined stroke. In addition, the fitting convex portion  44  which is protruded by the foregoing movement member  40  and is slidably fitted to the groove  38 , the first engagement portion  48  formed in the foregoing movement member  40 , and the locking portion  38   b  perpendicularly formed in the foregoing groove  38  comprise a locking means designed to let the movement of the foregoing movement member  40  releasably locked to the movement end in the movement direction of the movement member  40  taking against the urging force of the urging means. In addition, various compositions can be employed as these locking means but not limited to the composition shown in the present embodiments in particular.