JPH053193Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial field of application This invention indicates the pattern selected by the operator using a light-emitting display means such as a lamp, and forms a desired pattern on the work cloth according to the pattern cam related to the selection. In a pattern stitch sewing machine, a light-emitting display means flashes while the operator is selecting a pattern, and after the selection is completed, the light-emitting display means is turned on and a sounding means such as a buzzer is activated to remind the operator of the pattern. The present invention relates to a pattern sewing machine configured to visually and audibly notify whether a pattern is being selected or whether pattern selection has been completed.

Prior Art A desired cam is selected from a plurality of built-in pattern cams by rotating a selection operation body represented by a dial, and a pattern is mechanically formed on the work cloth according to the selected pattern cam. Pattern-stitch sewing machines that perform this type of sewing have become popular in general. This pattern stitch sewing machine is, for example, as shown in Figs. 2 and 3.
A pattern cam 12 for needle swinging is provided above the sewing machine frame 10.
A pattern cam 14 for feeding the fabric is rotatably disposed, and a selection operation body 1 consisting of a pattern selection dial is provided on the front side of the pillar 16 in the sewing machine frame 10.
8 and a swing width adjustment dial 20 are arranged in parallel. The selection operation body 18 is inserted into and fixed to the tip of a rotary shaft 22 rotatably supported in the sewing machine frame 10, and a release cam 24 and a selection operation body are provided at a portion of the rotary shaft 22 facing inside the sewing machine frame 10. cam 2
6 are commonly inserted and fixed.

As shown in FIGS. 2 and 4, the release cam 24 has a plurality of pattern cams 1 on its circumferential surface.
A cam surface 24a for engaging and disengaging a contactor to be described later with respect to each of 2 and 14 is formed corresponding to each pattern. Further, the pattern cam 12 for needle swinging and the pattern cam 14 for cloth feeding include
The swingable support frames 28 and 30 are arranged close to each other, and the contacts 32 provided on these support frames 28 and 30 can be engaged with and disengaged from each of the pattern cams 12 and 14, respectively. ing. Furthermore, sewing machine frame 10
A swing lever 34 that can swing by engaging with the cam surface 24a of the release cam 24 is pivotally supported on a support shaft 35, and the open end 34a of this lever is connected to the support frame 2.
8, 30 and is engaged with an engaging piece 36 that hangs down. Therefore, when the selection operation body 18 is rotated, the release cam 24 is also rotated, swinging the swing lever 34 that is engaged with the cam surface 24a, and moving the support frame through the engagement piece 36. By swinging 28 and 30, the contact 32 can be engaged with and disengaged from each of the pattern cams 12 and 14.

Further, the selection cam 26 has a double cylindrical wall, and a cam surface 26a for selecting the pattern cam 14 for cloth feeding is formed at the open end of the cylindrical wall located on the outside, and a cam surface 26a located on the inside. A cam surface 26b for selecting the pattern cam 12 for swinging the needle is formed at the open end of the cylindrical wall. The corresponding pattern cam 14 and cam surface 26a and pattern cam 12 and cam surface 26b are connected to the link lever mechanism 38 shown in the drawings, respectively.
By rotating the selection operation body 18, the rotation position of the selection cam 26 is changed to a rotation position corresponding to the desired pattern, and the desired pattern is selected according to the selected pattern cams 12, 14. can be formed on the processed fabric.

Problems to be solved by the invention In this type of pattern sewing machine, the selection operation body 18
Generally, various display means, such as a display, are provided for the purpose of visually and/or aurally displaying information regarding the pattern, etc. selected by the rotation operation to the operator. . For example, in the pattern sewing machine shown in FIG. 3, the upper arm 40
Display 42 on the front side of the operator's side is composed of a group of light emitting diodes that displays information regarding various stitch patterns, stitch widths, types of presser feet, etc., and indicates the selected information by light.
is installed. Then, the operator selects the operating object 1.
When a desired pattern is selected by rotating 8, a light emitting diode provided in the display section of the information related to the selection among the various information displayed on the display 42 lights up, indicating that the selection is complete. This information is now displayed to the operator.

However, when selecting a pattern, if the selection operation body 18 is stopped rotating approximately halfway between two circumferentially adjacent pattern selection positions due to operator inexperience, the desired pattern cam may not be selected. Therefore, if pattern stitching is performed in this state, an unexpected pattern will be formed on the workpiece cloth. In order to deal with this problem, when the selection operation body is rotated, a lamp is separately provided to indicate that the pattern is being selected and lights up, and as disclosed in Publication No. 59-40942, the pattern selection Measures such as having a buzzer sound inside have been proposed.

However, in the former case, in addition to the light-emitting display means that indicates information about the selected pattern using light, a means such as a lamp is required to indicate when the pattern is being selected, and in the latter case, the buzzer continues to sound while the pattern is being selected. It has the drawbacks of harming the environment and being audible. The latter problem is particularly significant when the desired pattern to be selected is located far away, requiring a large rotation of the selection operation body 18.

Purpose of the invention This invention was proposed in order to solve the above-mentioned drawbacks inherent in pattern stitch sewing machines according to the prior art. When selecting a pattern by rotating it to a certain position, the light-emitting display means blinks during the pattern selection operation, and after the selection is completed, the light-emitting display means is turned on and a sounding means such as a buzzer is activated to select the corresponding pattern. It is an object of the present invention to provide a means by which an operator can reliably visually and audibly recognize whether a pattern is being selected or whether the pattern selection has been completed.

Means for Solving the Problems In order to overcome the above problems and achieve the intended purpose, the present invention provides a contactor for each of a plurality of pattern cams prepared for forming a plurality of patterns. A release cam is formed with a cam surface for engagement and disengagement corresponding to each pattern, and is rotatably supported on a sewing machine frame, and the contact is positioned at a position facing each of the plurality of pattern cams. A selection cam is formed with a cam surface corresponding to each pattern, and is rotatably supported on the sewing machine frame, and the release cam and selection cam are rotated to correspond to the desired pattern. A code for generating a pattern code signal indicating a pattern corresponding to a rotational position of the selection cam in a sewing machine including a selection operation body operable to change the rotation position of the selection cam and operatively connected to both cams. a signal generating means; a state detecting means disposed in relation to the release cam for detecting the engagement state and disengagement state of the contact with each of the pattern cams and generating an engagement state signal and a disengagement state signal; an optical display means that operates according to the pattern code signal to display a desired pattern selected by the selection operation body; and an optical display means that continuously performs a display operation on the optical display means according to the engagement state signal. a display control means for causing the optical display means to perform an intermittent display operation in accordance with the disengagement state signal; and a sound generation means for operating for a certain period of time from the start of generation of the engagement state signal to generate a pattern completion notification sound. It is characterized by having the following.

Embodiments Next, preferred embodiments of the pattern stitch sewing machine according to the present invention will be described below with reference to the accompanying drawings. Note that the same members as those described in relation to the prior art will be indicated by the same reference numerals.

As shown in FIG. 2, the selection cam 26, which has cam surfaces 26a and 26b on one side for selecting the pattern cams 12 and 14, respectively, has a plurality of rows of uneven cam portions 44 on the other side. , the selected cam 2
6 are integrally formed in four rows in an arc shape with different radii in the rotation direction. Further, a support substrate 46 is fixed at a fixed position inside the sewing machine frame 10 and close to the uneven cam portion 44 of the selection cam 26. On this support substrate 46, four switches SW ₁ to _{SW 4} typified by micro switches are arranged at predetermined positions, and switch pushing pieces P ₁ to P projecting from these switches SW ₁ to SW ₄ , respectively. ₄ , above 4
It is oriented correspondingly to the concave and convex cam portions 44 of the row.
Then, by rotating the selection cam 26, each uneven cam portion 4
When the switches SW ₁ -SW 4 engage and disengage from the corresponding push pieces P 1 -P ₄ , each switch SW ₁ -SW ₄ performs an on operation and an off operation.

The switches SW ₁ to _{SW 4} are electrically connected to a code signal generating means 48 that generates a code signal instructing a pattern corresponding to the rotational position of the selection cam 26 according to the on and off operations of the switches. has been done. This code signal generating means 48, for example, as shown in _FIG .
The encoder 50 is connected to a memory 52 that stores various pattern guide information (for example _, display data for zigzag stitches and display data for decorative patterns), and the memory 52 is connected to a driver. It is connected via 54 to a display 42 consisting of a liquid crystal display panel.

Further, as the release cam 24 rotates, the swing lever 34, which engages and disengages from the cam surface 24a and swings around the support shaft 35, has a release cam 24.
A pin 56 protruding parallel to the support shaft 35 is fixed at a portion adjacent to the support shaft 35 . Furthermore, a state detection means 58 (hereinafter referred to as "pattern selection state detection switch"), which is represented by a micro switch, is disposed at an appropriate fixed position in the sewing machine frame 10.
The pushing piece 58a of the detection switch 58 is positioned so as to face the swinging area of the pin 56 which is arranged to protrude from the swinging lever 34. When the release cam 24 rotates and swings the swing lever 34, the pin 56 provided on the lever presses and releases the push piece 58a of the detection switch 58, turning the switch on and off. An action is taken. That is, when the detection switch 58 is turned on,
It detects that the contactor 32 is engaged with each pattern cam 12, 14 and generates an engagement state signal, and when the switch 58 is turned off, the contactor 32 is turned off. Each pattern cam 12,
14 and generates a detached state signal. The engaged state signal or disengaged state signal from the detection switch 58 is input to an inverter 60 and a mono-multivibrator _MM1 , as will be described later with reference to FIG.

Furthermore, in the control circuit for the sewing machine drive system and pattern selection display system shown in FIG. In order to display the desired pattern that has been created, it operates in accordance with a pattern code signal from the code signal generating means 48. Further, reference numeral 64 causes the optical display means 62 to perform a continuous display operation according to the engagement state signal from the detection switch 58, and causes the optical display means 62 to perform an intermittent display operation according to the disengagement state signal. The display control means for performing the following is shown. Similarly, reference numeral 66 indicates a sounding means, typified by a piezoelectric buzzer, which operates for a certain period of time from the start of generation of the engagement state signal from the detection switch 58 to generate a pattern completion notification sound.

Next, the operation of the pattern sewing machine according to the embodiment of the present invention constructed as described above will be explained.
When forming a desired pattern, when the operator rotates the selection operation body 18 to select a pattern, the selection cam 26 that operates in conjunction with this also changes to a rotation position corresponding to the desired pattern, and the cam surfaces 26a, The pattern cam 14 for cloth feeding and the pattern cam 12 for needle swinging corresponding to 26b are selected. As the selection cam 26 rotates, the uneven cam portion 44 formed on one side of the selection cam engages and disengages the push pieces P ₁ to _{P 4} provided on each switch SW ₁ to SW ₄ in a corresponding manner. As a result, each switch SW ₁ to SW ₄ is turned on and off. Turn on/off the four switches SW ₁ to SW ₄ .
The electrical intermittent signal due to the off operation is generated by the encoder 50 in the code signal generating means 48.
converted into a coded address signal.

This address signal is input to a memory 52 that stores pattern guide information regarding zigzag stitches and various decorative patterns whose shapes are displayed on a pattern display board (not shown), and specifies a desired memory area here. The pattern guide information specified in the memory 52 is transferred to the selection cam 2 by rotating the selection operation body 18.
6 corresponds to the selected pattern cams 12, 14, and this pattern guide information is transmitted via the driver 54 to operate the display 42 consisting of a liquid crystal display board, and displays the selected pattern name, needle swing amount, fabric feed amount, etc. Displays information such as the type of presser foot.

Further, the release cam 24 is also rotated synchronously by the rotation operation of the selection operation body 18, thereby causing the swing lever 34 that engages with the cam surface 24a to swing. As a result, the pin 56 protruding from the lever 34 presses and releases the pushing piece 58a of the detection switch 58, turning the switch on and off. When this detection switch 58 is turned on, the contactor 32 is turned on for each pattern cam 1, as described above.
2 and 14, and when the switch 58 is turned off, the contact 32
shows a state in which the pattern cams 12 and 14 are detached from each other. Therefore, if the engagement state signal from the detection switch 58 is set to the H level and the disengagement state signal is set to the L level, the detection switch 58 will output the H level as the swinging lever 34 swings due to the rotation of the release cam 24. This means that the level signal and the L level signal are generated alternately and intermittently.

Therefore, the H level signal and L level signal from the detection switch 58 are input to the AND circuit 68 after having their phases inverted by the inverter 60. Also
Since the pulse signal from the oscillator 70 is also input to the AND circuit 68, only when both the outputs from the inverter 60 and the oscillator 70 become H level signals, the AND circuit 68 outputs the
A level signal is output intermittently. That is, the withdrawal state signal (L level signal) serves as a trigger for causing the AND circuit 68 to output an H level signal.

Further, the address signal encoded by the encoder 50 is input to a decoder 72.
The decoder 72 outputs a signal corresponding to the address signal, and the optical display means 6
An L level signal is input to the light emitting diodes (LEDs) among the plurality of light emitting diodes (LEDs) constituting the device.
Further, the collector of the chopping transistor TR is connected to the optical display means 62, and the above-mentioned
The output terminal of the AND circuit 68 is the transistor TR
is connected to the base. And AND circuit 68
When the output from the transistor is at L level, the transistor
The TR is made conductive to light up a selected one light emitting diode (LED) in the optical display means 62.

However, while the selection operation body 18 is being rotated to select a pattern, the H level signal is intermittently outputted from the AND circuit 68 as described above. This H level signal is input to the base of the transistor TR to intermittently make the collector-emitter non-conductive, so that the optical display means 62 is intermittently activated in accordance with the disconnection state signal from the detection switch 58. Perform display operation. In other words, selection operation body 1
8, the swinging lever 34 is moved to the release cam 2.
4, the light emitting diode flashes to visually notify the operator that the pattern is being selected.

When the selection of the pattern by rotating the selection operation body 18 is completed, the swing lever 34 is moved to the release cam 24.
It is stabilized by engaging with the required cam surface 24a at. At this time, as described above, the detection switch 58
Since an H level signal is generated from the inverter 60 and the output of the inverter 60 is set to L level, the output from the AND circuit 68 is also set to L level, and one selected light emitting diode (LED) in the optical display means 62 is lit continuously. let In addition, the H level signal from the detection switch 58 is a mono multivibrator.
MM ₁ is triggered to output an H pulse of a constant width from the vibrator MM ₁ .

Further, the output of the L level signal from the inverter 60 is branched and input to one side of the second AND circuit 74. The other input terminal of the second AND circuit 74 is connected to the sewing machine start/stop switch 7 shown in the figure.
The output from switch 76 is connected to
generates an L level signal when not operated. Therefore, the second AND circuit 74 outputs an L level signal, and the mono multivibrator MM ₂ shown in the circuit diagram
is not triggered. For this reason, the 3-input OR circuit 78
outputs only a single pulse from the mono-multivibrator _MM1 , which operates the sounding means 66 represented by the piezoelectric buzzer via the driver 80 to generate a pattern completion notification sound once. Since the mono multi-vibrator MM ₁ itself functions as an on-delay timer, the pattern completion notification sound continues for a certain period of time.

Further, the rotation of the selection operation body 18 is stopped midway,
When no pattern is selected, the swing lever 34 is disengaged from the cam surface 24a of the release cam 24. Therefore, detection switch 5
A withdrawal state signal is generated from 8, and as described above, one selected light emitting diode (LED) in the optical display means 62 is made to blink intermittently to visually inform the operator that no pattern selection has been made. make you aware.

Despite this state, when the operator turns on the sewing machine start/stop switch 76 mentioned above, the switch 76 generates an H level signal, which is input to the second AND circuit 74. Note that the second AND
Since the H level signal from the inverter 60 is input to the circuit 74, the AND circuit 74 outputs the H level signal. Therefore, to the motor control device 82 shown in the circuit diagram, a stop command is issued by the H level signal from the AND circuit 74 in priority to the start command from the start/stop switch 76, and the sewing machine motor 84 is not started. Also
The H level signal from the AND circuit 74 triggers the mono multivibrator MM ₂ to generate a pulse with a constant width, thereby causing the 3-input OR circuit 7
A single pulse is outputted from 8 to operate the sound generating means 66, and a single notification sound is generated for only a single time.
Furthermore, the falling signal of the pulse from the mono multivibrator MM ₂ triggers the subsequent mono multivibrator MM ₃ with a time difference, so that the vibrator MM ₃ generates a pulse of a constant width, and the pulse from the 3-input OR circuit 78 is generated. The sounding means 66 is operated by a single pulse to again generate a single notification sound for a single time. That is, in a state where no pattern has been selected, the light emitting diode (LED) in the optical display means 62 is intermittently blinked to visually remind the operator, and if the start/stop switch 76 is turned on, The sound generating means 66 generates a single-time notification sound twice with a time difference,
It also gives an audible warning to the operator.

Effects of the invention As explained above, the present invention provides a pattern sewing machine in which a pattern selected by an operator is indicated by a light-emitting display means such as a lamp, and a desired pattern is formed on a workpiece cloth according to a pattern cam related to the selection. During the pattern selection operation by the operator, the light-emitting display means blinks to visually indicate this, and after the pattern selection is completed, the light-emitting display means is turned on and a sounding means such as a buzzer is activated, The apparatus is configured to allow the operator to visually and audibly recognize that the pattern selection has been completed, and to ensure that the selection operation tool selects the pattern.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a control circuit in the sewing machine drive system and pattern selection display system used in a pattern stitch sewing machine according to an embodiment of the present invention, and FIG. 2 is a longitudinal sectional view of the sewing machine according to an embodiment of the present invention. FIG. 3 is a front view of the pattern stitch sewing machine according to the embodiment, and FIG. 4 is a schematic diagram showing the positional relationship between the release cam, the swing lever, and the contactor used in the pattern stitch sewing machine according to the embodiment. 10... Sewing machine frame, 12, 14... Pattern cam, 18... Selection operation body, 24... Release cam, 24a... Cam surface, 26... Selection cam, 26
a, 26b...cam surface, 32...contact, 34...
... Swinging lever, 48 ... Code signal generating means, 5
8... Status detection means, 62... Optical display means, 6
4... Display control means, 66... Sound generation means.

Claims (1)

[Claims for Utility Model Registration] [1] Cam surface 2 for engaging and disengaging the contactor 32 with each of a plurality of pattern cams 12 and 14 prepared for forming a plurality of patterns.
4a is formed corresponding to each pattern, and a release cam 24 is rotatably supported on the sewing machine frame 10.
Cam surfaces 26a and 26b for positioning the contactor 32 at positions facing each of the plurality of pattern cams 12 and 14 are formed corresponding to each pattern, and are rotatable on the sewing machine frame 10. A supported selection cam 26 is operable to change the rotational position of each of the release cam 24 and selection cam 26 to a rotational position corresponding to a desired pattern, and is operatively connected to both cams 24 and 26. A sewing machine equipped with a selection operation body 18, comprising: code signal generation means 48 for generating a pattern code signal instructing a pattern corresponding to the rotational position of the selection cam 26; and contact with each of the pattern cams 12, 14. Child 3
a state detection means 58 disposed in relation to the release cam 24 to detect the engaged state and disengaged state of the release cam 24 and generate an engaged state signal and a disengaged state signal; an optical display means 62 that operates according to the pattern code signal to display a desired pattern; and an optical display means 62 that continuously performs a display operation according to the engagement state signal, and displays the disengagement state signal. Accordingly, a display control means 64 causes the optical display means 62 to perform an intermittent display operation, and a sound generation means 66 operates for a certain period of time from the start of generation of the engagement state signal to generate a pattern completion notification sound.
A pattern sewing machine characterized by being equipped with. [2] The state detection means 58 includes a switch that is opened and closed by a swinging lever 34 that engages with the cam surface 24a of the release cam 24 and swings.
Pattern stitch sewing machine described in section.